taxonID	type	description	language	source
677387C4F346FFD7D6E9FBCEFA3FFA0F.taxon	type_taxon	Type species: Iphinoe trispinosa (Goodsir, 1843)	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD7D6E9FBCEFA3FFA0F.taxon	diagnosis	Diagnosis. Five pedigerous somites visible, the first short. Pereopod 2 6 - articulated. Uropod endopod 2 - articulated.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD7D6E9FBCEFA3FFA0F.taxon	discussion	Remarks. At present, the combination of these morphological characters, in Day’s diagnosis (1978), except for “ uropod rami shorter than peduncle ” (subequal in a Iphinoe crassipes specimen ibid), is enough for the identification of the genus in the subfamily Bodotriinae. Thereafter, Haye (2007) described rather more detailed morphological characters of the genus but showed that each character exhibits considerable variation between species. Therefore, it is difficult to include other characters in the diagnosis above.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD2D6E9FA1EFDAAF98A.taxon	description	(Fig. 1) Gamô (1958): 23 – 24, fig. 1; Gamô (1962): 22 – 24, fig. 9.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD2D6E9FA1EFDAAF98A.taxon	diagnosis	Diagnosis. Ovigerous female. Carapace 0.23 – 0.26 times total body length, 2.1 – 2.5 times as long as wide, 2.1 – 2.7 times depth; median dorsal ridge with 8 – 16 teeth; width of round eye lobe 0.15 – 0.20 times carapace width, 0.9 – 1.2 times eye lobe length; antero-lateral angle with 3 – 6 teeth; inferior margin without teeth. Antenna 1 peduncle article 1 0.90 – 1.10 times as long as article 3. Pereopod 1 propodus with long seta on inner distal corner; dactylus 0.78 – 0.89 times as long as carpus. Uropod peduncle with spiniform setae. Adult male. Median dorsal ridge of carapace very weak or obsolete, with 1 – 2 prominent spines; eye lobe 0.20 – 0.28 times as carapace width, 1.1 – 1.4 times as long as eye lobe length; antero-lateral angle with 3 – 6 teeth; inferior margin without teeth. Antenna 1 main flagellum article 1 with 2 – 4 aesthetascs.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD2D6E9FA1EFDAAF98A.taxon	materials_examined	Material examined. Five ovigerous females, 6.6 – 7.6 mm, dissected, 5 adult males, 6.0 – 7.0 mm, 3 specimens dissected (NSMT Cr- 32961), Omaezaki, southern coast of Honshu, 34 ° 38.26 ' N, 138 ° 17.86 ' E – 34 ° 38.12 ' N, 138 ° 17.86 ' E, 70.5 – 71 m (KT- 10 - 16, St. OM), 13 August 2010; 4 ovigerous females, 4.9 – 6.1 mm, 1 adult male, 5.2 mm, partially dissected, Shimoda, Sagami Bay, 34 ° 39.16 ' N, 138 ° 57.04 ' E – 34 ° 38.98 ' N, 138 ° 56.81 ' E, 42 – 47 m, 25 October 2017; 3 preparatory females, 5.8 – 6.3 mm, partially dissected, off Shimoda, 34 ° 41 ' N, 138 ° 57 ' E, 14 m, 27 November 2014; 2 ovigerous females, 7.0, 7.2 mm, 3 preparatory female, 6.7 – 7.7 mm, partially dissected, Misaki, Sagami Bay 35 ° 09.44 ' N, 139 ° 36.85 ' E, 4 m, 19 January 2015; 1 ovigerous female, 8.3 mm, 3 adult males, 7.3 – 8.0 mm, partially dissected, Misaki, Sagami Bay, 35 ° 09.55 ' N, 139 ° 36.98 ' E, 4 – 4.5 m, 13 March 2013; 1 ovigerous female, 6.7 mm, partially dissected, Misaki, Sagami Bay, 35 ° 09.55 ' N, 139 ° 36.94 ' E, 4.5 m, 24 January 2014; 1 ovigerous female, 8.2 mm, partially dissected, Enshu-nada, southern coast of Honshu, 34 ° 37.52 ' N, 137 ° 59.38 ' E – 34 ° 37.46 ' N, 137 ° 59.53 ' E, 52 – 62 m (KT- 02 - 5, St. EN 4 - 1), 27 May 2002; 1 ovigerous female, 8.3 mm, 2 preparatory females, 9.3, 10.0 mm, partially dissected Enshu-nada, 34 ° 34.78 ' N, 138 ° 04.89 ' E – 34 ° 34.63 ' N, 138 ° 04.82 ' E, 69 – 74 m (KT- 02 - 5, St. EN 2 - 2), 26 May 2002; 3 ovigerous females, 6.1 – 7.5 mm, 1 preparatory female (damaged), partially dissected, Enshu-nada, 34 ° 34.79 ' N, 138 ° 04.0 ' E – 34 ° 34.76 ' N, 138 ° 03.88 ' E, 84 – 88 m (KT- 10 - 16, St. EN- 1), 13 August 2010; 1 subadult male, 7.1 mm, partially dissected, Cape Toi, eastern coast of Kyushu, 31 ° 20.05 ' N, 131 ° 17.46 ' E – 31 ° 20.07 ' N, 131 ° 16.88 ' E, 101 m (TY 02), 22 May 2002, collected by M. Shimomura.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD2D6E9FA1EFDAAF98A.taxon	description	Description of selected characters. Ovigerous females, 4.9 – 8.3 mm. Carapace 0.24 – 0.26 times total body length, 2.14 – 2.55 times width, 2.09 – 2.70 times depth; median dorsal ridge with 8 – 16 teeth; pseudorostral lobes 0.11 – 0.16 times carapace length, not in contact at anterior end (Fig. 1 B); width of eye lobe (Fig. 1 B) 0.15 – 0.20 times carapace width, 0.93 – 1.17 times eye lobe length; antennal notch deep; antero-lateral angle (Fig. 1 A) rather pointed, succeeded by 3 – 6 teeth; inferior margin smooth. Pereon 0.96 – 1.20 times as long as carapace. Pleon 0.48 – 0.50 times total animal length. Antenna 1 (Fig. 1 C) peduncle article 1 1.1 – 1.5 times as long as article 2, 0.9 – 1.1 times as long as article 3; article 3 1.1 – 1.4 times as long as article 2; main flagellum biarticulate, 0.24 – 0.34 times as long as peduncle article 3, accessory flagellum uniarticulate, 0.4 – 0.7 times as long as main flagellum article 1. Antenna 2 with 2 – 3 plumose setae. Maxilliped 2 coxa (Fig. 1 D) rudimentary oostegite strongly bent, with 7 – 13 setae. Pereopod 1 (Fig. 1 E) basis 0.7 – 0.9 times as long as distal articles together, with one spine on distal end of ventral surface; carpus 1.2 – 1.4 times as long as merus, 0.7 – 0.9 times as long as propodus; propodus 1.3 – 1.6 times as long as dactylus, with long simple seta on inner distal corner (arrowed on figure); dactylus 0.8 – 0.9 times as long as carpus. Uropod peduncle with 11 – 12 spiniform setae on inner margin. Adult males, 5.2 – 8.0 mm. Carapace (Fig. 1 F, G) 0.24 – 0.27 times total body length, 2.63 – 2.98 times as long as wide, 2.29 – 2.45 times depth; median dorsal surface nearly straight, seen from side; weak median dorsal ridge on frontal lobe, with 1 – 2 prominent spines, without minute spines; pseudorostrum 0.11 – 0.16 times carapace length; left and right pseudorostral lobes not in contact at anterior end (Fig. 1 G); width of round eye lobe (Fig. 1 G) 0.22 – 0.28 times carapace width and 1.1 – 1.4 times eye lobe length; antennal notch triangular; anterolateral angle not pointed, succeeded by 3 – 6 teeth; lower margin smooth. Antenna 1 (Fig. 1 H) peduncle article 1 1.3 – 1.5 times as long as article 2 and 1.0 – 1.2 times as long as article 3; article 3 1.2 – 1.4 times as long as article 2; main flagellum biarticulate, 0.3 – 0.5 times as long as peduncle article 3; article 1 with 2 – 4 aesthetascs; accessory flagellum uniarticulate, 0.4 – 0.6 times as long as main flagellum article 1. Pereopod 3 (Fig. 1 I) basis 1.0 – 1.2 times as long as distal articles together, globular protrusion near basal end of basis with 4 – 5 pappose setae.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD2D6E9FA1EFDAAF98A.taxon	discussion	Remarks. Iphinoe sagamiensis was described from specimens from the southern coast of Honshu (female specimens from Sagami Bay, 20 m (Gamô 1958), and male specimens from Tanabe Bay, Kii Peninsula (Gamô 1962). The specimens examined in this study, from the southern coast of Honshu and Kyushu, agree with the description by Gamô. Iphinoe sagamiensis is similar to Iphinoe tenera Lomakina, 1960 from the Yellow Sea, Bo Hai in the shape of the carapace, but is distinguished from the latter by (1) the anterior portion of carapace in females is without a longitudinal ridge in females, (2) the dorsal surface of the carapace has 1 – 2 spines and the anterolateral corner has teeth in males, (3) the pereopod 1 propodus has a long seta on inner distal corner, (4) the uropod peduncle is without long setae on the inner margin (Table 1). Iphinoe sagamiensis is also similar to Iphinoe gurjanovae from the Yellow Sea but is distinguished from the latter by (1) the median dorsal ridge on the carapace has more teeth, (2) the dorsal surface of carapace has 1 – 2 spines in males, (3) the uropod peduncle is without long setae (Table 1).	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F346FFD2D6E9FA1EFDAAF98A.taxon	distribution	Distribution. Pacific coast of Honshu (southern area) and Kyushu Islands, Japan, 4 – 101 m.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F343FFDCD6E9F9ABFC51FC5B.taxon	description	(Figs 2 – 4)	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F343FFDCD6E9F9ABFC51FC5B.taxon	diagnosis	Diagnosis. Ovigerous female. Carapace 0.25 – 0.27 times total body length, 2.0 – 2.3 times as long as wide, 2.2 – 2.4 times depth. median dorsal ridge with 17 – 27 teeth present for entire length of carapace; width of round eye lobe 0.11 – 0.14 times carapace width, 0.8 – 0.9 times eye lobe length; antero-lateral angle pointed, succeeded by 12 – 20 teeth on anterior half of inferior margin of carapace. Antenna 1 peduncle article 1 1.08 – 1.48 times as long as article 3. Pereopod 1 propodus with long simple seta on distal end; dactylus 0.90 – 1.11 times as long as carpus. Uropod peduncle with spiniform setae. Adult male. Carapace with weak median dorsal ridge running for anterior half of carapace, with 2 – 5 distinct and 5 – 10 minute spines; width of eye lobe 0.17 – 0.19 times carapace width, 0.8 – 1.0 times eye lobe length; antero-lateral angle forming obtuse angle, succeeded by 11 – 19 teeth on anterior half of inferior margin of carapace. Antenna 1 main flagellum article 1 with 2 – 4 aesthetascs.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F343FFDCD6E9F9ABFC51FC5B.taxon	materials_examined	Type material. Holotype ovigerous female, 9.7 mm (NSMT Cr- 32962), NE off Nomuro-zaki, western Wakasa Bay, the Sea of Japan, 35 ° 45.26 ' N, 135 ° 20.88 ' E – 35 ° 45.04 ' N, 135 ° 21.03 ' E, 99.2 – 100 m, 27 May 2013, Collected by H. Saito and Y. Kai. Paratypes. 30 ovigerous females, 26 preparatory females, 37 adult males, 17 subadult males, 10 juveniles (4 ovigerous females, 8.7 – 9.8 mm and 3 adult males, 9.3 – 10.3 mm dissected) (NSMT Cr- 32963), same locality and date as the holotype female; 15 ovigerous females, 44 preparatory females, 10 adult males, 11 subadult males, 6 juveniles, 12 manca larvae (1 ovigerous female, 7.9 mm dissected) (NSMT Cr- 32964), NE off Nomuro-zaki, western Wakasa Bay, the Sea of Japan, 35 ° 45.09 ' N, 135 ° 20.44 ' E – 35 ° 45.09 ' N, 135 ° 20.17 ' E, 96 – 96.3 m, 2 September 2010, collected by H. Saito and Y. Kai. Other material examined. Six ovigerous females, 7.0 – 7.8 mm, 3 adult males, 8.1 – 8.2 mm (1 specimen damaged), partially dissected, Enshu-nada, 34 ° 36.11 ' N, 137 ° 59.06 ' E – 34 ° 36.01 ' N, 137 ° 59.27 ' E, 113 – 172 m (KT- 02 - 5, St. EN 4 - 2), 27 May 2002; 3 ovigerous female, 7.3 – 7.7 mm, 1 preparatory female, 7.5 mm, partially dissected, western coast of Izu Peninsula, 34 ° 50.88 ' N, 138 ° 44.78 ' E – 34 ° 50.77 ' N, 138 ° 44.69 ' E, 128 – 136 m (KT- 02 - 5, St. IZW- 1), 29 May 2002; 1 ovigerous female, 7.4 mm, 2 preparatory females, 7.1, 7.7 mm, 4 adult males, 8.2 – 8.5 mm, partially dissected, Kumano-nada, 34 ° 13.12 ' N, 136 ° 38.98 ' E – 34 ° 13.29 ' N, 136 ° 39.10 ' E, 107 – 109 m (KT- 03 - 1, St. KN- 3), 7 April 2003, collected by T. Sasaki; 2 ovigerous females, 7.5, 8.4 mm, 1 preparatory female, 7.9 mm, partially dissected, off Kamogawa, Boso Peninsula, 34 ° 59.11 ' N, 140 ° 03.29 ' E – 34 ° 59.33 ' N, 140 ° 03.35 ' E, 104 – 108 m (KT- 03 - 17, St. KG- 1), 17 Nov., 2003; 1 ovigerous female, 6.7 mm, 2 adult males, 8.0, 8.2 mm, partially dissected, off Kamogawa, 34 ° 58.19 ' N, 140 ° 05.19 ' E – 34 ° 58.40 ' N, 140 ° 05.12 ' E, 169 – 200 m (KT- 03 - 17, St. KG- 2), 17 Nov., 2003; 1 ovigerous female, 7.6 mm, partially dissected, 34 ° 17.71 ' N, 136 ° 71.92 ' E – 34 ° 17.61 ' N, 136 ° 71.92 ' E, 139 – 140 m, sand, 22 May, 2014, collected by H. Saito and K. Kimura.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F343FFDCD6E9F9ABFC51FC5B.taxon	description	Description. Holotype ovigerous female, 9.7 mm (Fig. 2 A – D). Body moderately calcified, almost naked. Carapace smooth, 0.25 times total body length, 2.0 times as long as wide, 2.3 times depth; dorsal surface with median ridge running for entire length of carapace, with 26 teeth, prominent for anterior half; pseudorostrum (Fig. 2 C, D) 0.12 times carapace length; distal end in contact each other; width of round eye lobe (Fig 2 B, D) 0.14 times carapace width, 0.9 times eye lobe length; antennal notch (Fig. 2 C) deep; antero-lateral angle pointed, lower margin of carapace with 12 teeth for anterior half of carapace. Pereon 1.08 times carapace length; pereonite 2 well developed; pereonite 3 and 4 with projection at hind margin. Pleon 0.48 times total body length; without ridges or ornaments. Paratype five ovigerous females, 7.9 – 9.8 mm. Carapace 0.25 – 0.26 total body length, 2.0 – 2.1 times as long as wide, 2.2 – 2.3 times depth. median dorsal ridge with 18 – 27 teeth; pseudorostrum 0.12 – 0.14 times carapace length; width of eye lobe 0.11 – 0.12 times carapace width, 0.8 – 0.9 times eye lobe length; antennal notch deep; antero-lateral angle pointed, lower margin with of carapace with 13 – 20 teeth for anterior half of carapace. Pereon 1.01 – 1.08 times carapace length. Pleon 0.47 – 0.49 times total body length; without ridges. Antenna 1 (Fig. 2 E) peduncle almost naked, article 1 weakly curved, 1.4 – 1.5 times as long as article 2, 1.2 – 1.4 times as long as article 3; article 3 1.1 – 1.2 times as long as article 2; main flagellum biarticulate, 0.4 times as long as peduncle article 3, article 1 2.0 – 2.7 times as long as article 2; accessory flagellum uniarticulate, 0.5 – 0.6 times as long as main flagellum article 1. Antenna 2 (Fig. 2 F) biarticulate, basal article with three pappose setae on distal margin; article 2 with three broom setae distally. Left and right mandibles (Fig. 2 G) with 14 – 15, 13 setae, respectively; lacinia mobilis tridentate; incisor process 4 - dentate. Labium (Fig. 2 H) distal end slightly projected narrowly, with five dentate setae. Maxilla 1 (Fig. 2 I) outer endite with 12 – 14 spiniform setae; inner endite with one tridentate, 3 – 4 setulate, and one simple setae; palp with two terminal setae. Maxilla 2 (Fig. 2 J) narrow endites with 6 – 7 setae on each; broad endite with 24 – 29 thin (broad at base) setae. Maxilliped 1 (Fig. 2 K, L) with 16 – 18 branchial lobules; basis 1.3 – 1.5 times combined length of distal articles; carpus (numerous setae on ventral surface omitted in Fig. 2 K), with seven thin dentate setae on inner margin; propodus with two plumose and one simple setae on inner distal corner; dactylus with three minute terminal setae. Maxilliped 2 (Fig. 3 A) basis 1.7 – 1.9 times as long as distal articles together, with pappose seta in inner distal corner; carpus with 10 – 11 setae on inner margin; propodus with 9 – 11 simple setae on inner margin; dactylus with three terminal and two simple subterminal setae; rudimentary oostegite of coxa strongly bent, with 12 – 13 setae. Maxilliped 3 (Fig. 3 B) basis 1.7 – 1.9 times as long as remaining distal articles, with 2 – 3 plumose seta on inner distal region, outer distal corner strongly projected reaching proximal region of carpus, with 14 – 16 plumose setae; ischium with 2 – 3 plumose setae on inner margin; merus outer distal corner projected, with 3 – 5 setae, inner margin with 1 – 2 plumose and 0 – 1 simple setae; carpus with 5 – 6 plumose setae on inner margin; propodus with 5 – 6 simple setae on inner margin; dactylus with 4 – 6 terminal setae; exopod flagellum of five articles. Pereopod 1 (Fig. 3 C) basis 0.7 – 0.8 times as long as distal articles together, with one spine on distal end of ventral surface, outer and inner margins serrated; carpus 1.2 – 1.4 times as long as merus, 0.8 – 0.9 times as long as propodus; propodus 1.1 – 1.3 times as long as dactylus, with long simple seta on inner distal corner; dactylus 1.0 – 1.1 times as long as carpus, with four simple terminal setae; exopod flagellum of five articles. Pereopod 2 (Fig. 3 D) basis 0.7 times as long as remaining articles together, with 3 – 4 plumose setae on outer margin; merus with large spiniform seta on inner distal corner; carpus 1.0 – 1.3 times as long as merus, with spiniform seta on inner distal corner; dactylus 1.4 – 1.8 times as long as carpus and 2.7 – 3.4 times as long as dactylus, with 8 – 12 setae. Pereopod 3 (Fig. 3 E) basis 1.1 – 1.3 times as long as distal articles together, with one plumose and one simple setae on distal corner; ischium with one plumose and 2 – 4 simple setae on distal corner; carpus with 4 – 5 simple setae on distal region; dactylus small. Pereopod 4 (Fig. 3 F) basis 0.8 – 0.9 times as long as distal articles together, with 5 – 7 plumose setae on outer margin, plumose seta on distal corner; ischium with one plumose and 4 – 8 simple setae; carpus with five simple setae on distal region; dactylus small. Pereonite 5 (Fig. 3 G) basis 0.8 times as long as distal articles together, with 1 – 3 plumose setae on lateral margin, plumose seta on distal corner; ischium with plumose or simple setae on distal corner; carpus with 4 – 5 simple setae on distal region; dactylus small. Uropod (Fig. 3 H) peduncle 1.3 – 1.4 times as long as pleonite 6, 1.3 – 1.4 times as long as exopod and 1.4 – 1.5 times as long as endopod, with 9 – 14 spiniform setae on inner margin; exopod 1.0 – 1.1 times as long as endopod, with four plumose setae on outer margin, 15 – 17 plumose setae on inner margin and apical end; endopod biarticulate, article 1 0.5 – 0.6 times as long as article 2; article 1 with five spiniform setae on inner margin; article 2 with 11 – 15 spiniform setae on inner margin and 6 – 8 plumose setae on outer margin and apex. Paratype 1 preparatory female, 8.4 mm. The specimen is similar to the ovigerous females, except that the width of the posterior margin of the carapace is narrow (carapace 2.5 times as long as wide). Paratype three adult males, 9.3 – 10.3 mm (Fig. 4). Body moderately calcified. Carapace (Fig. 4 A – D) 0.24 – 0.25 times total body length, 2.6 – 2.7 times as long as wide and 2.1 – 2.3 times depth; dorsal surface weakly arched, with very weak median ridge on frontal lobe; 2 – 5 prominent and 5 – 10 minute spines on median dorsal ridge; pseudorostrum 0.10 – 0.12 times carapace length; left and right pseudorostrum in contact at distal end; width of round eye lobe (Fig. 4 B, D) 0.17 – 0.18 times carapace width and 0.9 – 1.0 times eye lobe length; antennal notch (Fig. 4 C) shallow; anterolateral angle (Fig. 4 C) not pointed, succeeded by 12 – 18 teeth on anterior half of lower margin of carapace. Pereon 0.93 – 0.96 times as long as carapace; pleon 0.52 – 0.53 times total body length. Antenna 1 (Fig. 4 E) peduncle article 1 1.5 – 1.6 times as long as article 2 and 1.3 – 1.5 times as long as article 3; article 3 1.1 – 1.2 times as long as article 2; main flagellum biarticulate, 0.4 – 0.5 times as long as peduncle article 3; article 1 2.2 – 2.6 times as long as article 2, with 2 – 4 aesthetascs; accessory flagellum biarticulate, 0.5 times as long as main flagellum article 1. Antenna 2 (Fig. 4 F) peduncle article 5 3.6 – 4.4 times as long as article 4; flagellum exceeds posterior end of pleonite 6. Maxilliped 3 (Fig. 4 G) basis 1.8 – 1.9 times as long as distal articles together, outer distal corner projected, with 11 – 19 plumose setae; ischium with three plumose setae on inner margin; merus with 0 – 1 plumose seta on inner margin, with 2 – 4 plumose setae, inner margin with one plumose and 0 – 1 simple setae; carpus with 5 – 7 plumose and 0 – 2 simple setae on inner margin; propodus with 3 – 6 simple setae on inner distal region; dactylus with 3 – 4 terminal setae. Pereopod 1 (Fig. 4 H) basis 0.8 times as long as distal articles together, with 19 – 24 spiniform setae on basal region of ventral surface; carpus 1.3 – 1.4 times as long as merus, 0.8 – 0.9 times as long as propodus; propodus 1.1 – 1.2 times as long as dactylus, with long simple seta on distal end; dactylus 1.0 – 1.1 times as long as carpus, with four terminal setae. Pereopod 2 (Fig. 4 I), basis 0.7 – 0.8 times as long as distal articles together, with 2 – 4 plumose setae on inner margin and 4 – 5 plumose setae on outer margin, 0 – 2 plumose setae on outer and inner distal corner; merus with robust seta on inner distal corner; carpus 0.9 – 1.1 times as long as merus, with robust seta on inner distal corner; dactylus 1.5 – 1.9 times as long as carpus and 2.9 – 3.3 times as long as propodus. Pereopod 3 (Fig. 4 J) basis 1.2 – 1.3 times as long as distal articles together, with 5 – 6 plumose setae on outer margin; globular protrusion with 5 – 7 plumose setae present near inner proximal end of basis; ischium with one plumose and 3 – 5 simple setae on distal end; carpus with five simple setae on distal region. Pereopod 4 (Fig. 4 K) basis 0.9 – 1.0 times as long as distal articles together, with 5 – 6 plumose setae on outer margin, two setae on outer distal corner; ischium with 0 – 2 plumose and 2 – 3 simple setae on distal corner; carpus with 5 – 6 simple setae on distal region. Pereopod 5 (Fig. 4 L) basis 0.8 – 0.9 times as long as distal articles together, with plumose seta on lateral margin, two plumose setae on distal corner; ischium with 0 – 1 plumose and 3 – 4 simple setae on distal corner; carpus with five simple setae on distal region. Pleopod 1 (Fig. 4 M) peduncle 3 – 4 plumose and 6 – 7 simple setae on inner margin; inner ramus biarticulate, outer ramus distal article with 25 – 29 plumose setae; inner ramus without lateral process, with 20 – 25 plumose setae. Uropod (Fig. 4 N) peduncle 1.4 – 1.5 times as long as pleonite 6, 1.4 – 1.6 times as long as exopod, 1.5 – 1.6 times as long as endopod, with 54 – 58 stiff setulate or serrated setae on inner margin; exopod 1.0 times as long as endopod, with 24 – 25 plumose setae; endopod biarticulate; article 1 0.4 – 0.5 times as long as article 2, with 8 – 9 spiniform setae on inner margin; article 2 with 12 – 20 spiniform setae on inner margin, 5 – 8 plumose setae on outer margin and apex.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F343FFDCD6E9F9ABFC51FC5B.taxon	discussion	Remarks. Iphinoe wakasaensis sp. nov. is closely similar to Iphinoe sagamiensis but is distinguished from the latter by (1) the carapace median dorsal ridge has teeth for entire length of carapace in females, (2) the male dorsal surface of carapace has prominent and minute teeth, (3) the lower margin of the carapace is serrated in both sexes, (4) the eye lobe is smaller, (5) the anterior end of left and right pseudorostral lobes contact each other, (6) the female antenna 1 peduncle article 1 is longer than article 3, and (7) relative length of the pereopod 1 dactylus to carpus is slightly longer (Table 1). Iphinoe wakasaensis also lives in slightly deeper habitats, 96 – 200 m, than I. sagamiensis at 4 – 101 m depths. Iphinoe wakasaensis is similar to I. tenera from the Yellow Sea, but is distinguished from the latter by (1) the anterior portion of the carapace is without a longitudinal ridge, (2) the basis of of pereopod 1 is shorter than combined length of distal articles in females ,, (3) the uropod peduncle is without long setae in females, (4) the dorsal surface of carapace has prominent and minute teeth in males, and (5) the anterolateral angle of the carapace has teeth in males (Table 1). Iphinoe wakasaensis is also similar to I. gurjanovae from the Chinese coast of the Yellow Sea but is distinguished from the latter by (1) the median dorsal ridge of carapace has many more teeth, (2) the uropod peduncle is without long setae in females, and (3) the dorsal surface of carapace has 2 – 5 prominent spines in males (Table 1).	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F343FFDCD6E9F9ABFC51FC5B.taxon	distribution	Distribution. Wakasa Bay, the Sea of Japan, 96 – 100 m. Southern coast of Honshu, Japan, 96 – 200 m.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34DFFDAD6E9FBEAFD42F8BB.taxon	description	(Fig. 5) Kim & Kim, 2020, 307 – 316, fig. 1 – 4, table 1 (male description).	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34DFFDAD6E9FBEAFD42F8BB.taxon	diagnosis	Diagnosis. Ovigerous female. Carapace 0.24 – 0.25 times total body length, 1.9 – 2.1 times as long as wide, 2.0 – 2.2 times depth. median dorsal ridge strong at anterior, weak at posterior region, with 14 – 20 teeth for entire length of carapace; width of triangular eye lobe 0.12 – 0.16 times carapace width, 1.5 – 1.7 times eye lobe length; antero-lateral angle succeeded by 4 – 6 teeth; inferior margin smooth, without teeth. Pereopod 1 basis 1.1 – 1.2 times as long as distal articles together; dactylus shorter than carpus; propodus with 4 – 6 long simple seta on inner distal region. Uropod peduncle with long plumose setae and spiniform setae on inner margin. Adult male. Carapace median dorsal ridge very weak or obsolete, without spines; antero-lateral angle with 3 – 4 teeth; inferior margin without teeth. Antenna 1 main flagellum article 1 with 6 – 8 aesthetascs.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34DFFDAD6E9FBEAFD42F8BB.taxon	materials_examined	Material examined. 86 ovigerous females, 26 preparatory females, 9 adult males, 3 subadult males (including dissected 5 ovigerous females, 6.1 – 7.2 mm, 3 adult males, 6.9 – 7.5 mm) (NSMT Cr- 32965), off Ushimado, the Seto Inland Sea of Japan, 34 ° 35 ' N, 134 ° 09 ' E, 15 m, 15 April, 1998.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34DFFDAD6E9FBEAFD42F8BB.taxon	description	Description. Five ovigerous females, 6.1 – 7.2 mm (Fig. 5). Body moderately calcified, with few hairs, integument glossy. Carapace (Fig. 5 A – D) 0.24 – 0.25 times total body length, 1.9 – 2.1 times as long as wide, 2.0 – 2.2 times depth; dorsal surface with median ridge running for entire length of carapace, posterior half weak, with 14 – 20 teeth; pseudorostrum (Fig. 5 B, D) 0.12 – 0.15 times carapace length; width of rather triangular eye lobe (Fig 5 B, D) 0.12 – 0.16 times carapace width, 1.5 – 1.7 times eye lobe length; antennal notch (Fig. 5 C) prominent; antero-lateral angle round, with 4 – 6 teeth; lower margin of carapace smooth. Pereon 1.06 – 1.13 times carapace length; pereonite 2 well developed. Pleon 0.48 – 0.50 times total body length; without ridges. Antenna 1 (Fig. 5 E) peduncle almost naked, article 1 weakly curved, 1.4 – 1.6 times as long as article 2, 0.9 – 1.0 times as long as article 3; article 3 1.6 times as long as article 2, with two broom setae on distal corner; main flagellum biarticulate, 0.4 times as long as peduncle article 3, article 1 2.8 – 3.2 times as long as article 2; accessory flagellum uniarticulate, 0.3 – 0.5 times as long as main flagellum article 1. Antenna 2 (Fig. 5 F) biarticulate, basal article with 3 – 4 pappose setae on distal and lower margin. Mandibles, maxilla 1 and 2, maxilliped 1 similar to males described in Kim & Kim (2020). Maxilliped 2 coxa (Fig. 5 G) rudimentary oostegite weakly bent, with 11 – 13 setae. Maxilliped 3 (Fig. 5 H) basis 1.8 – 2.0 times as long as distal articles together, with 3 – 5 plumose setae on inner distal region, outer distal corner strongly projected reaching median region of carpus, with 9 – 13 plumose setae; ischium naked; merus with one plumose and two simple setae on outer distal region; carpus with 3 – 4 setae on inner margin; propodus with five simple setae on inner distal corner; dactylus with 3 – 5 terminal setae; well-developed exopod, flagellum of five articles. Pereopod 1 (Fig. 5 I) basis 1.1 – 1.2 times as long as distal articles together, outer margin coarsely serrated with 17 – 21 teeth; ischium with plumose seta on inner distal corner; carpus 1.1 – 1.6 times as long as merus, 0.9 – 1.2 times as long as propodus; propodus 1.0 – 1.1 times as long as dactylus, with 4 – 6 long simple setae on inner distal region; dactylus 0.8 – 1.0 times as long as carpus, with 3 – 4 terminal setae; well-developed exopod flagellum of five articles. Pereopod 2 (Fig. 5 J) basis 0.7 – 0.8 times as long as distal articles together, with 5 – 7 plumose setae on inner margin and 3 – 6 plumose setae on outer margin; merus with robust seta on distal end and plumose seta on inner margin; carpus 1.0 – 1.2 times as long as merus; dactylus 1.0 – 1.2 times as long as carpus, 2.3 – 2.8 times as long as propodus, with 6 – 8 setae. Pereopod 3 (Fig. 5 K) basis 1.1 – 1.4 times as long as distal articles together, with 4 – 5 plumose setae on lateral margin; ischium with 3 – 5 simple setae on distal corner; carpus with 3 – 5 simple setae on distal region; dactylus small. Pereopod 4 (Fig. 5 L) basis 0.8 – 1.0 times as long as distal articles together, with 2 – 3 plumose setae on lateral margin, three plumose setae on distal corner; ischium with 3 – 4 simple setae on distal corner; carpus with 6 simple setae on distal region; dactylus small. Pereonite 5 (Fig. 5 M) basis 0.8 – 0.9 times as long as distal articles together, with 0 – 1 simple seta on lateral margin and 2 – 3 plumose setae on distal corner; ischium with 3 – 4 simple setae on distal corner; carpus with 4 – 6 simple setae on distal region; dactylus small. Uropod (Fig. 5 N) peduncle 1.4 – 1.8 times as long as pleonite 6, 1.2 – 1.5 times as long as exopod and 1.3 – 1.5 times as long as endopod, with 6 – 10 spiniform seta and 4 – 5 plumose setae on inner margin; exopod 1.0 – 1.1 times as long as endopod, with 3 – 4 simple and 14 – 16 plumose setae; endopod biarticulate, article 1 0.7 – 0.8 times as long as article 2; article 1 with 4 – 6 spiniform setae on inner margin; article 2 with 6 – 7 spiniform setae on inner margin and 5 – 7 plumose setae on outer margin and apex.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34DFFDAD6E9FBEAFD42F8BB.taxon	discussion	Remarks. Male specimens of Iphinoe indenticulata from the Seto Inland sea agree well with the description given by Kim & Kim (2020). Iphinoe indenticulata is distinguished from I. sagamiensis and I. wakasaensis, the other two Japanese Iphinoe species, by (1) the triangular eye lobe, (2) the antenna 1 article 3 is slightly longer relative to article 2 in females, (3) the antenna 1 main flagellum article 1 has more aesthetascs in the adult males, (3) the pereopod 1 basis is longer than combined length of distal articles, and the propodus has more long setae on the inner distal region, (4) the uropod peduncle has long setae on the inner margin in females, and (5) the dorsal surface of the carapace lacks spines (Table 1). Iphinoe indenticulata is similar to I. tenera from the Chinese and Korean coasts of the Yellow Sea but is distinguished from the latter by (1) the anterior portion of carapace in females is without a longitudinal ridge, (2) the inner distal region of the pereopod 1 propodus has more setae in females, and (3) the anterolateral angle of the carapace has teeth in males (Table 1). Iphinoe indenticulata is also similar to I. gurjanovae from the Chinese coast of the Yellow Sea, 0 – 37 m, but is distinguished from the latter by (1) the dorsal surface of the carapace has more teeth in females, (2) the pereopod 1 basis outer margin is serrated and the propodus inner distal region has more long setae in females, and (3) the anterolateral corner on the carapace in males has teeth (Table 1).	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34DFFDAD6E9FBEAFD42F8BB.taxon	distribution	Distribution. Seto Inland Sea of Japan, 15 m, muddy bottom. Korea, 2 – 5 m.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34AFFC7D6E9FF67FDBAFC87.taxon	description	(Figs 6 – 8)	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34AFFC7D6E9FF67FDBAFC87.taxon	diagnosis	Diagnosis. Female. Carapace 0.25 – 0.26 times total body length, 1.6 times as long as wide, 1.6 times depth, with 3 – 4 broad, weak longitudinal ridges on each side; very weak median dorsal ridge present on frontal lobe, without teeth; pseudorostrum 0.14 times carapace length, upturned, truncate at distal end; width of eye lobe 0.25 – 0.27 times carapace width, 2.2 – 2.6 times eye lobe length, slightly depressed on median frontal region; antennal notch deep, triangular; antero-lateral angle pointed, succeeded by 10 – 17 teeth on lower margin of carapace. Antenna 1 main flagellum very thick, article 2 with hard, curved setae. Maxilliped 3 merus greatly expanded. Pereopod 1 dactylus with robust setae directing upward. Pereopod 2 dactylus 1.4 – 1.6 times as long as basis. Uropod exopod with 4 – 8 spiniform setae on outer margin; biarticulate endopod article 1 1.7 – 1.9 times as long as article 2.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34AFFC7D6E9FF67FDBAFC87.taxon	materials_examined	Type material. Holotype ovigerous female, 4.8 mm (NSMT Cr- 32966), Southern part of the Sulu Sea, Philippine, 06 ° 05.09 ' N, 118 ° 59.21 ' E – 06 ° 05.21 ' N, 118 ° 59.10 ' E, 192 m (KH- 00 - 1, St. B 2, DG- 2), 22 February 2000. Paratypes; 2 ovigerous females, 5.1, 4.8 mm, dissected, 2 preparatory females, 4.6, 5.0 mm (1 specimen dissected), 1 juvenile female, 4.2 mm, dissected (NSMT Cr- 32967), same locality and date as holotype specimen (KH- 00 - 1, St. B 2, DG- 2).	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34AFFC7D6E9FF67FDBAFC87.taxon	description	Description. Holotype ovigerous female, 4.8 mm (Fig. 6 A – D). Body moderately calcified, without setae. Carapace 0.25 times total body length, 1.64 times as long as wide, 1.61 times depth; integument with scale-like sculpture (Fig. 6 D), each scale encircled by net-like structure, running just below surface of integument; dorsal surface with very weak median ridge, without teeth; each side with four broad, weak longitudinal ridges (Fig. 6 C); pseudorostrum (Fig. 6 B, C) 0.14 times carapace length, upturned; distal end truncate, without setae; width of eye lobe (Fig. 6 B) 0.25 times carapace width and 2.6 times eye lobe length, slightly depressed at median frontal region; antennal notch (Fig. 6 C) deep, triangular; antero-lateral angle pointed, lower margin of carapace with 10 teeth. Pereon 0.93 times carapace length; pereonite 1 visible; pereonites 2 well developed. Pleon 0.52 times total body length; without ridges. Paratype two ovigerous and two preparatory females. Carapace 0.25 – 0.26 total body length, 1.62 – 1.64 times as long as wide, 1.58 – 1.65 times depth; very weak median ridge on dorsal surface without spines, each side with 3 – 4 broad, weak longitudinal ridges; pseudorostrum 0.14 times carapace length; width of eye lobe 0.25 – 0.27 times carapace width, 2.2 – 2.5 times eye lobe length, slightly depressed at median frontal region; antennal notch deep, triangular; antero-lateral angle pointed, lower margin of carapace with 16 – 17 teeth. Pereon 0.85 – 0.92 times carapace length. Pleon 0.52 – 0.53 times total body length, without ridges; pleonite 6 1.4 – 1.5 times as long as wide, projecting posteriorly between uropods. Antenna 1 (Fig. 6 E) peduncle article 1 near straight, 1.7 – 1.9 times as long as article 2, 1.2 – 1.3 times as long as article 3, with two spines on distal region; article 2 with four small spines and 1 – 2 feather-like setae; article 3 1.4 – 1.5 times as long as article 2, with 1 – 2 feather-like setae on lateral margin. Main flagellum biarticulate, very thick, as wide as distal end of peduncle article 3, 0.3 times as long as peduncle article 3; article 2 with four hard curved setae, two directed laterally (arrowheads in Fig. 6 E); button-like accessory flagellum minute. Antenna 2 (Fig. 6 F) biarticulate, basal article with three long pappose setae near inferior margin. Left and right mandibles (Fig. 6 G) navicular, with 15 setae on inner margin, respectively; lacinia mobilis tridentate; incisor process tridentate. Labium (Fig. 6 H) distal end narrow, with five broad setae. Maxilla 1 (Fig. 7 A) outer endite broad, with 12 simple or dentate spiniform setae arranged near linearly; inner endite rather narrow distally, with one tridentate and three simple setae; palp with two terminal setae. Maxilla 2 (Fig. 7 B, C) narrow endites with 30 and 27 setae, respectively; broad endite distal margin with 27 setae of various shape on upper margin, 28 thin (broad at base) setae on lower margin. Maxilliped 1 (Fig. 7 D, E) with 16 branchial lobules; carpus with 13 simple setae on ventral surface and eight non-dentate robust setae on inner margin; propodus rather thin, curved, with two setulate setae; dactylus weakly curved, with three short, spiniform setae with setules. Maxilliped 2 (Fig. 7 F) basis 0.7 times as long as distal articles together, with long plumose seta in inner distal corner; carpus with 9 – 11 setae on inner margin; propodus with 3 – 7 setae on inner margin; dactylus with three terminal and two subterminal setae; rudimentary oostegite of coxa with 7 – 8 setae in ovigerous female. Maxilliped 3 (Fig. 8 A) basis 0.8 – 0.9 times as long as distal articles together, with two spines and plumose seta on inner distal corner; outer distal corner projected reaching mid region of carpus, with 3 – 5 plumose setae on inner margin and two long plumose terminal setae; ischium with 2 – 4 plumose setae on inner margin; merus greatly expanded, exceeding distal end of carpus, with 1 – 3 plumose setae on inner margin and 10 – 11 setae on outer margin; ventral surface of merus, ischium and carpus forming flat area with scale-like sculpture; propodus 1.6 – 1.9 times as long as carpus and 2.0 – 2.2 times as long as dactylus, with 3 – 4 simple setae on inner margin; dactylus with three terminal setae; well-developed exopod flagellum of five articles. Pereopod 1 (Fig. 8 B) basis 0.5 – 0.6 times as long as distal articles together, with 0 – 1 plumose setae on inner distal corner; inner and outer margin serrated; ischium and merus with plumose seta on inner distal corner; carpus thick, 2.1 – 2.6 times as long as merus, 1.5 – 1.6 times as long as propodus, with pappose seta on inner margin and 4 – 5 short feather-like setae on outer margin; propodus curved near proximal end, 1.1 – 1.3 times as long as dactylus, with two robust setae on distal end; dactylus with 6 – 8 stiff, denticulate setae directing outward and forward; well-developed exopod flagellum of six articles. Pereopod 2 (Fig. 8 C) basis 0.5 times as long as remaining articles together, with 5 – 6 simple setae on distal corner; merus and carpus short, with two and three robust setae, respectively; propodus triangular, inner region not visible; dactylus 1.4 – 1.6 times as long as basis, with 3 three rows of 3 – 4 robust denticulate setae. Pereopod 3 (Fig. 8 D) basis 0.8 – 1.0 times as long as distal articles together, with 3 – 4 pappose and 2 – 3 setulate setae on lateral margin, 1 – 2 plumose setae on distal corner; ischium with 5 – 6 simple setae on distal corner: merus with two simple setae on distal corner; carpus with 4 – 5 simple setae on distal corner; dactylus much longer than wide, with robust terminal seta having two rows of denticles. Pereopod 4 (Fig. 8 E) basis 0.5 times as long as distal articles together, with four pappose or simple setae on lateral margin, 1 – 2 simple setae on distal corner; ischium with 4 – 6 simple setae on distal corner; carpus with 4 – 5 simple setae on distal region, dactylus much longer than wide, robust terminal seta with two rows of denticles. Pereonite 5 (Fig. 8 F) basis 0.3 – 0.5 times as long as distal articles together, with 0 – 1 pappose seta on lateral margin, two simple or pappose setae on distal corner; ischium with five simple setae on distal end; merus with two simple setae; carpus with five simple setae on distal region; dactylus much longer than wide, robust terminal seta with two rows of denticles. Uropod (Fig. 8 G) peduncle 1.0 – 1.1 times pleonite 6 length, 1.2 – 1.5 times as long as exopod, 0.9 – 1.0 times as long as endopod, with 5 – 6 spiniform setae; exopod 0.7 times as long as endopod, with 4 – 8 spiniform setae on outer margin, five robust setae on apex; endopod biarticulate, article 1 1.7 – 1.9 times as long as article 2, with 6 – 7 spiniform setae on inner margin; article 2 with 2 – 3 spiniform setae on inner margin and two terminal setae. Paratype 1 juvenile female, 4.2 mm. The specimen is very similar to the ovigerous and preparatory females. Dorsal region of pereonite 1 narrow, visible on dorsal region.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34AFFC7D6E9FF67FDBAFC87.taxon	etymology	Etymology. The species’ name refers to the type locality, the Sulu Sea.	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
677387C4F34AFFC7D6E9FF67FDBAFC87.taxon	discussion	Remarks. The new species is closely similar to Iphinoe crassipes Hansen, 1895 from the west coast of Africa and the Mediterranean, 6 – 103 m. The adult specimens were well described in Stebbing (1910), Băcescu (1961), Day, (1978), Petrescu (1998), and Corbera (1994). Iphinoe suluensis sp. nov. is distinguished from I. crassipes by (1) having 4 – 8 spiniform setae present on the outer margin of the uropod exopod (not present in I. crassipes), (2) the median-dorsal ridge of the carapace obsolete (discernible, with small teeth in I. crassipes), (3) the antenna 1 main flagellum article 2 with 4 stiff simple setae (1 – 2 simple setae in I. crassipes). Iphinoe suluensis is also similar to Iphinoe pokoui Le Loeuff & Intes, 1972 from Cote D’Ivoire, western coast of Africa, 20 m. The former species is distinguished from the latter by (1) the carapace has longitudinal ridges for the entire length (anterior portion in I. pokoui), (2) the antennal notch is triangular (round, widely open in I. pokoui), (3) the uropod endopod is longer than the exopod (subequal or slightly shorter than exopod in I. pokoui), and (4) the uropod exopod article 2 is much longer than article 1 (subequal in length to article 1 in I. pokoui).	en	Akiyama, Tadashi (2025): On the genus Iphinoe (Crustacea, Cumacea) from Japanese waters and the Sulu Sea, Philippines, with the description of two new species. Zootaxa 5689 (3): 549-569, DOI: 10.11646/zootaxa.5689.3.7, URL: https://doi.org/10.11646/zootaxa.5689.3.7
