Bodotria (Bodotria) hwanghaensis, Kim & Lee & Kim, 2020

Kim, Sung-Hyun, Lee, Chang-Mok & Kim, Young-Hyo, 2020, Three new species of the genus Bodotria (Crustacea: Cumacea: Bodotriidae) from the Yellow Sea in Korea, Zootaxa 4869 (1), pp. 55-77 : 63-68

Bodotria (Bodotria) hwanghaensis sp. nov.

( Figs 6–9 )

(Korean Name: Hwang-Hae-cham-ol-chaeng-i-sae-u, new)

Type material. Holotype, adult male, 5.15 mm, cat no. NIBRIV0000837775, Nokdo I., Ocheon-myeon , Boryeongsi, Chungcheongnam-do, Korea, depth 2–3 m, 36° 16' 10.0"N, 126° 16' 03.1"E, 7 June 1997, (C.M. Lee) collected by light trap (dissected).

Additional material examined: 10 ♂♂, Maryang Harbour , Maryang-ri , Seocheon-gun, Chungcheongnamdo, Korea, depth 2 m, 36° 07' 57.9"N, 126° 30' 03.5"E, 28 September 2011, (S.H. Kim & S.S. Hong) collected by light trap . 11 ♂♂, Daecheon Port , Sinheuk-dong, Boryeong-si, Chungcheongnam-do, Korea, depth 2–3 m, 36° 19' 43.6"N, 126° 30' 56.9"E, 27 April 2018, (S.H. Kim, Y.G. Lee & J.H. Heo) collected by light trap .

Diagnosis. Adult male. Carapace almost ovoid in dorsal view, dorso-median carina well-marked over whole length of carapace, dorso-lateral carina well-developed over whole length of carapace and lower edge of mid-lateral depression forming a faint ridge, antennal notch and antero-lateral corner prominent, pseudorostral lobes broadly truncated, ocular lobe subtriangular, with 8 lenses. Maxilliped 3 merus and carpus dilated. Pereopod 1 carpus not dilated. Pereopod 2 basis without plumose seta. Uropod peduncle with 4 plumose and 19–20 microserrate setae medially; endopod uniarticulate. Female unknown.

Description. Holotype, adult male, 5.15 mm, cat no. NIBRIV0000837775.

Carapace ( Figs. 6A, B , 7A, B ) slightly shorter than 1/4 of body length, almost ovoid in dorsal view, 1.4 times as long as wide, 1.7 times as long as deep; surface covered with pits; dorso-median carina well-marked over whole length of carapace; dorso-lateral carina well-developed over whole length of carapace and lower edge of mid-lateral depression forming a faint ridge; antennal notch and antero-lateral corner ( Fig. 7A ) prominent; pseudorostral lobes ( Fig. 7B ) broadly truncated and almost meeting in front of ocular lobe; ocular lobe ( Fig. 7B ) subtriangular, with 8 lenses. Pereon subequal to carapace length; dorso-median carina slightly elevated, except that third pereonite is raised postero-dorsally. Pleon plump, 1.4 times as long as carapace and pereon together.

Antenna 1 ( Fig. 7C ) peduncle 3-articulate; article 1 1.2 times as long as remaining articles combined, with numerous hair-like, 11 short simple, 3 complex pedunculate setae; article 2 0.3 times article 1 length, with 3 short simple and 4 complex pedunculate setae distally; article 3 1.5 times article 2 length, with 2 short simple and 3 complex pedunculate setae distally. Main flagellum 2-articulate; article 1 with 1 short simple seta and 10 aesthetascs; article 2 with 1 short simple, 3 long simple setae, and 2 aesthetascs terminally. Accessory flagellum very minute, with 2 short simple and 2 complex pedunculate setae.

Antenna 2 ( Figs. 7A, D ) extending beyond pleotelson; peduncle 5-articulated; article 1 with 1 plumose seta; article 2 with 2 plumose setae; article 3 with 1 short simple seta; articles 4–5 with numerous simple setae, article 4 with 1 complex pedunculate seta dorsodistally, article 5 with 2 complex pedunculate setae dorsodistally.

Left mandible ( Fig. 7E ) with row of few hair-like and 10 lifting setae; incisor with 5 teeth; lacinia mobilis with 5 teeth.

Right mandible ( Fig. 7F ) with row of few hair-like and 10 lifting setae; incisor with 4 teeth.

Maxilla 1 ( Fig. 7G ) outer endite with few hair-like setae on medial and lateral margins, 1 simple seta laterally, few hair-like, 6 stout simple, 3 stout microserrate, and 1 stout tricuspid setae terminally; inner endite with few hair-like setae medial face, 1 simple seta with subterminal setules, 1 microserrate, 2 stout microserrate, and 2 stout tricuspid setae terminally; palp broken, with 2 setae which one of the 2 setae has some hairs.

Maxilla 2 ( Fig. 8A ) broad endite with several hair-like and 17 simple setae medially, several hair-like setae on lateral face, 1 plumose, 22 simple, 5 stout simple, and 3 stout pappo-microserrate setae terminally; outer endite with 6 stout simple setae terminally; inner endite with 6 stout microserrate setae terminally.

Maxilliped 1 ( Fig. 8B ) basis partly broken, with 1 long plumose seta on medial distal corner, 3 short simple setae on lateral face, few hair-like setae laterodistally, medial lobe with 2 hook and 7 plumo-microserrate setae medially, 5 plumose setae terminally; ischium absent; merus with 2 long plumose setae on medial distal corner, 1 short simple seta laterodistally; carpus 1.9 times merus length, with few hair-like, 4 plumose, 11 simple, and 7 beak setae medially, 1 short simple and 1 long plumose setae laterally; propodus 0.5 times carpus length, with 1 long plumose, 2 plumose, 5 simple setae distally; dactylus 0.7 times propodus length, with 1 simple, 1 long simple, and 2 stout simple setae terminally.

Maxilliped 2 ( Fig. 8C ) basis with several hair-like and 2 short simple setae medially, 1 long plumose seta on medial distal corner, 1 simple and 3 short simple setae laterally; ischium short, unarmed; merus with 1 plumose seta medially, 1 short simple seta laterally; carpus 1.1 times merus length, with few hair-like and 5 plumose setae medially, 1 short simple seta laterally; propodus 0.7 times carpus length, with 6 plumose setae medially, 2 long plumose setae laterally; dactylus 0.5 times propodus length, with 5 simple and 1 stout microserrate setae.

Maxilliped 3 ( Fig. 8D ) basis 1.9 times as long as remaining articles combined, with numerous hair-like setae on both margins, 2 plumose setae on medial distal corner, 1 short simple seta on distal face, lateral corner very inflated, reaching to the middle of merus, with 8 plumose setae; ischium 0.2 times basis length, with 2 plumose setae medially; merus 1.4 times ischium length, with 1 plumose seta medially, 1 plumose seta on lateral corner; carpus 1.3 times merus length, with 3 plumose setae medially, 1 plumose seta laterally; propodus 0.5 times carpus length, with 5 plumose setae medially, 2 short simple setae laterally; dactylus 0.9 times propodus length, with few hair-like setae medially, 1 short simple seta laterally, 2 simple and 4 microserrate setae terminally; exopod shorter than basis.

Pereopod 1 ( Fig. 8E ) basis 1.2 times as long as remaining articles combined, with 6 microserrate setae medially, 1 short simple seta mediodistally, 1 long plumose seta on near medial distal margin, 5 short simple setae on lateral distal face, several hair-like setae lateroproximally, 1 plumose seta laterodistally; ischium 0.05 times basis length, unarmed; merus 3.7 times ischium length, with 5 simple setae; carpus 1.9 times merus length, with 1 simple and 15 short simple setae; propodus 0.5 times carpus length, with 1 short simple seta medially, 2 simple setae on near medial distal corner, 4 simple setae laterally; dactylus subequal to propodus length, with 3 short simple setae laterally, 3 simple and 1 long simple setae terminally; exopod shorter than basis.

Pereopod 2 ( Fig. 9A ) basis fused with ischium, 1.4 times as long as remaining articles combined, with 2 simple and 2 short simple setae medially, 3 short simple and 2 complex pedunculate setae laterally; merus 0.2 times basis length, with 1 simple seta with single subterminal setule on medial distal margin, 1 short simple seta on lateral face; carpus 1.3 times merus length, with 1 short simple seta mediodistally, 2 stout microserrate setae and 1 stout long microserrate seta with subterminal setules on medial distal margin, 1 simple seta with subterminal setules laterodistally; propodus 0.5 times carpus length, unarmed; dactylus 2.1 times propodus length, with 2 short simple setae medially, 1 short simple seta laterally, 2 simple setae with single subterminal setule, 1 simple seta with subterminal setules, 1 long simple seta with single subterminal setule terminally.

Pereopod 3 ( Fig. 9B ) basis 1.4 times as long as remaining articles combined, with 2 complex pedunculate, 7 simple, and 1 long plumose setae; ischium 0.1 times basis length, with 1 short simple and 2 annulate setae laterodistally; merus 1.7 times ischium length, with 1 annulate seta laterodistally; carpus 1.4 times merus length, with 1 simple seta with subterminal setules, 1 annulate seta with single subterminal simple seta, and 1 simple seta on near medial distal corner, 1 broken seta lateroproximally; propodus 0.6 times carpus length, with 1 long simple seta with single subterminal simple seta on medial distal corner; dactylus 0.5 times propodus length, with 1 simple seta mediodistally, 1 simple seta laterodistally, 1 long microserrate seta terminally.

Pereopod 4 ( Fig. 9C ) basis 0.9 times as long as remaining articles combined, with 4 complex pedunculate setae medially, 2 long plumose and 3 short simple setae laterally, 1 long plumose seta on near lateral distal corner; ischium 0.1 times basis length, with 1 short simple and 2 annulate setae on near lateral distal corner; merus 1.8 times ischium length, with 1 annulate seta laterodistally; carpus 1.4 times merus length, with 1 short simple seta medially, 1 simple seta, 1 simple seta with subterminal setules, and 1 annulate seta with single subterminal setule on near medial distal corner, 1 short simple seta laterally; propodus 0.6 times carpus length, with 1 stout long simple seta with single subterminal setule on medial distal corner; dactylus 0.6 times propodus length, with 1 simple seta medially, 1 simple seta laterodistally, 1 stout microserrate seta terminally.

Pereopod 5 ( Fig. 9D ) basis 0.6 times as long as remaining articles combined, with 1 plumose, 1 short simple, and 2 complex pedunculate setae medially, 2 short simple and 1 long plumose setae laterally, 1 plumose seta on lateral distal corner; ischium 0.2 times basis length, with 2 annulate setae on lateral distal corner; merus 1.9 times ischium length, with 1 annulate seta laterodistally; carpus 1.5 times merus length, with 1 short simple seta medioproximally, 1 simple seta, 1 simple seta with subterminal setules, and 1 annulate seta with single subterminal simple seta on medial distal margin, 1 short simple seta lateroproximally; propodus 0.6 times carpus length, with 1 annulate seta with single subterminal simple seta on medial distal corner, 1 complex pedunculate seta on medial distal face; dactylus 0.5 times propodus length, with 1 simple seta medially, 1 simple seta laterodistally, 1 stout long simple seta terminally.

Uropod ( Fig. 9E ) peduncle 1.6 times pleotelson length, with 4 plumose and 19–20 microserrate setae medially. Uropod endopod uniarticulate, 0.6 times peduncle length, serrated on medial margin, with 12–14 stout microserrate setae with single subterminal setule medially, 1 stout microserrate seta with single subterminal setule and 1 stout long simple seta with single subterminal setule terminally. Uropod exopod subequal to endopod length, article 1 unarmed; article 2 with 9–10 plumose setae medially, 2 short simple, 1 simple, and 1 long simple setae terminally.

Etymology. The specific epithet hwanghaensis originates from the Korean word “Hwang-Hae”, meaning the Yellow Sea, named after the region in which the species was discovered.

Remarks. This new species Bodotria (Bodotria) hwanghaensis sp. nov. is similar to B. (B.) ovalis Gamô, 1965 in the combination of the following features: 1) carapace almost ovoid in dorsal view; 2) dorso-lateral carina well-developed over whole length of carapace; 3) all free pereonites with lateral carina well-marked; 4) pereopod 1 carpus not dilated; 5) uropod endopod uniarticulate. However, the new species is obviously distinguished from B. (B.) ovalis by the combination of the following features ( Table 1, condition of B. (B.) ovalis in parentheses): 1) carapace, dorsal surface is not flattened (vs. almost flattened); 2) pereon, dorso-median carina slightly elevated, except that third pereonite is raised postero-dorsally (vs. dorso-median carina on the third to fifth pereonites is raised); 3) pereopod 1, carpus 1.9 times merus length (vs. 1.5 times merus length); 4) pereopod 2, basis without plumose seta (vs. with 6 plumose setae).

Depth. 2–3 m.

Distribution. Korea (Yellow Sea).

Figures

FIGURE 6. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm: A, lateral view; B, carapace and pereon, dorsal view. Scale bars = 0.5 mm (A, B).

FIGURE 7. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm: A, habitus, lateral view; B, carapace and pereon, dorsal view; C, antenna 1; D, antenna 2; E, left mandible; F, right mandible; G, maxilla 1. Scale bars = 1.0 mm (A, B), 0.1 mm (C–F), 0.05 mm (G).

FIGURE 8. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm:A, maxilla 2; B, maxilliped 1; C, maxilliped 2; D, maxilliped 3; E, pereopod 1. Scale bars = 0.2 mm (D, E), 0.1 mm (B, C), 0.05 mm (A).

FIGURE 9. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm: A, pereopod 2; B, pereopod 3; C, pereopod 4; D, pereopod 5; E, pleotelson. Scale bars = 0.2 mm (A–E).