Scolopocryptops miyosii, Jonishi & Nakano, 2023

Jonishi, Taro & Nakano, Takafumi, 2023, Two new species of Scolopocryptops centipedes from southern Japan (Chilopoda: Scolopendromorpha: Scolopocryptopidae), European Journal of Taxonomy 908, pp. 155-182 : 163-168

Scolopocryptops miyosii sp. nov.

urn:lsid:zoobank.org:act:3BED6271-ED7E-4CAA-8F69-1DC48A68D7E1

Figs 3–8

Otocryptops curtus – Miyosi 1961: 180–181; 1971: 734.

Diagnosis

Antenna with sparse minute hairs and short setae on dorsal surface of basal two or three articles, subsequent articles densely setose. Cephalic plate with short lateral marginal sulci in posterior half. Forcipular coxosternite with anterior margin weakly bilobed, bearing darkly sclerotized bands almost reaching outer part, with a pair of small teeth. Coxopleuron approx. 1.5–1.7 × as long as sternite 23; pleural dorsal margin slightly protruding from lateral margin of tergite 23, posterior and ventral margins forming approx. 70–80° angle; coxopleural process short.

Etymology

The specific name is dedicated to the late Dr Yasunori Miyosi, who first provided detailed taxonomic accounts for this new species.

We herein suggest a Japanese name for this species as ‘Miyosi-akamukade’.

Material examined

Holotype JAPAN – Kyushu • ♂; Kagoshima, near Kirishima Mountains ( Figs 1 , 3A ); 31.88765 ° N, 130.83962 ° E; 616 m alt.; 2 Aug. 2022; T. Jonishi leg.; KUZ Z4375 .

Paratypes JAPAN – Kyushu • 1 ♂; same locality as for holotype; 31.88796° N, 130.84037° E; 626 m alt.; 2 Aug. 2022; T. Jonishi leg.; KUZ Z4376 • 1 ♀; Kagoshima, Aira ; 31.86924° N, 130.59942° E; 364 m alt.; 2 Aug. 2022; T. Jonishi leg.; KUZ Z4377 .

Additional material

JAPAN – Kyushu • 1 subadult; Oita, Saeki ; 32.93942 ° N, 131.72764 ° E; 71 m alt.; 20 Jun. 2022; Naoto Sawada leg.; KUZ Z4374 . – Amami Island • 1 subadult; Uken ; 28.28792 ° N, 129.31997° E; 435 m alt.; 13 Mar. 2021; Futaro Okuyama leg.; KUZ Z4378 • 1 subadult; Uken, Mt. Yuwan-dake ; 28.28962° N, 129.31441° E; 506 m alt.; 20 Jun. 2022; T. Jonishi leg.; KUZ Z4379 • 2 subadults; Yamato ; 28.33112° N, 129.36187 ° E; 315 m alt.; 20 Jun. 2022; T. Jonishi leg.; KUZ Z4380 , Z4381 • 1 ♀; same locality as for preceding; 28.33104 ° N, 129.36158° E; 314 m alt.; 21 Jun. 2022; T. Jonishi leg.; KUZ Z4382 • 1 subadult; same locality as for preceding; 28.33090 ° N, 129.36163° E; 317 m alt.; 22 Jun. 2022; T. Jonishi leg.; KUZ Z4383 • 1 ♀; same locality as for preceding; 28.33040° N, 129.36076° E; 301 m alt.; 22 Jun. 2022; T. Jonishi leg.; KUZ Z4384 .

Description of holotype [variation in other specimens given in square brackets]

Body length 54.4 mm [48.0– 69.1 mm in adults] in 80% ethanol, 60.3 mm [54.6–73.4 mm] before fixation. Body color brownish orange, antennae, legs, and ultimate legs yellowish ( Fig. 3B ).

Antennae 10.0 mm in length, approx. 0.18 × [0.16–0.23 ×] as long as body, composed of 17 articles; basal 3 articles with sparse minute hairs (see Bonato et al. 2010) and short setae dorsally, 4 th and subsequent articles densely setose [3 rd article moderately setose, articles 4–17 more densely setose in KUZ Z4377 and Z4382] ( Fig. 4A–B ). Cephalic plate as long as wide, with sides converging anteriorly ( Figs 4C–D , 5A ); its surface finely punctate [minute setae on each punctum present in KUZ Z4382 and subadults]; short lateral marginal sulci present in posterior half [marginal sulci significantly longer and more apparent in KUZ Z4377] ( Figs 4C–D , 5A ).

Second maxillae article 2 with elongated and semi-transparent dorsal spur distally; dorsal brush without transparent margin ( Fig. 5B–C ); pretarsus consisting of dark brown basal and semi-transparent short apical parts ( Fig. 5B–C ). Forcipular coxosternite and trochanteroprefemora sparsely punctate, coxosternite without sutures ( Fig. 5D ); forcipular trochanteroprefemur with small and blunt black process, with apparent basal suture ( Figs 5D , 6 ); anterior margin of coxosternite weakly convex and divided by median diastema; darkly sclerotized bands almost reaching outer part of anterior margin of coxosternite, with a pair of small but prominent teeth at middle of each side [right tooth absent in KUZ Z4377] ( Figs 5D , 6 ).

Tergites finely punctate; tergite 1 with anterior transverse suture, anterior margin covered by cephalic plate ( Figs 5A , 7A ). Paramedian sutures present on tergites 2–22 ( Fig. 7A ); lateral marginations complete on tergites 6–21 ( Fig. 7A ).

Sternites lacking paramedian sutures, finely punctate ( Fig. 7B ); sternites 3–20 with shallow longitudinal sulcus and slight median depression ( Fig. 7B ), both shallower and unapparent on anterior sternites. Sides of sternite 23 converging posteriorly, its posterior margin slightly concave ( Fig. 7C ).

Spiracles ovoid, present on leg-bearing segments 3, 5, 8, 10, 12, 14, 16, 18, 20, and 22.

Legs lacking setae; tarsi of legs 1–21 undivided; legs 1–19 [1–20 in KUZ Z4376] with lateral and ventral tibial spurs and tarsal spur, legs 20 and 21, respectively, with tibial spur and tarsal spur [leg 21 without tibial spur in KUZ Z4382]; leg 22 without spurs. All legs with two accessory spines.

Coxopleuron approx. 1.7 × [1.5–1.7 ×] as long as sternite 23 ( Fig. 7D ). Dorsal margin of ultimate pleuron slightly protruding from lateral side of tergite 23 ( Fig. 7D–E ), posterior margin with minute dark spine ( Fig. 7D ). Posterior and ventral margins of coxopleuron converging posteriorly, forming approx. 80° [70–80] angle ( Fig. 7D ); coxopleural process short, tip of process pointed, slightly directed dorsally ( Fig. 7D ). Surface of coxopleuron without setae, covered with various sized coxal pores; coxopleural process and dorso-posterior area of coxopleuron poreless ( Fig. 7D ).

Ultimate leg 14.1 mm [13.9–17.3 mm] in length, 0.26 × [0.24–0.3 ×] as long as body; all articles lacking setae ( Fig. 8A ); prefemur with two conical and pointed spinose processeses, ventral process large, dorso-medial one minute; pretarsus with two short accessory spines.

Genital segments occupying approx. ½ length of sternite 23. Sternite of genital segment 1 with sparse minute setae; posterior margin weakly convex ( Fig. 8B ). Sternite of genital segment 2 well developed, covered with sparse minute setae; posterior part of genital segment 2 overlapped by lamina subanalis, penis not visible in ventral view ( Fig. 8B ); lamina subanalis situated between genital segment 2 and anal valves ( Fig. 8B ) [in female paratype KUZ Z4377, genital segment 1 as described for holotype, genital segment 2 absent; lamina subanalis situated between genital segment 1 and anal valves] ( Fig. 8C ).

Remarks

This species has previously been identified as S. curtus ( Miyosi 1961, 1971; Ogawa 1961), but S. miyosii sp. nov. can be distinguished by the following characters: the presence of short sulci along the lateral margin of the cephalic plate ( Fig. 4C–D ) (vs sulci absent in S. curtus ), the convex anterior margin of the forcipular coxosternite with teeth ( Figs 5D , 6 ) (vs anterior margin virtually straight with teeth almost reduced, forming antero-lateral corner of sclerotized bands; also see Remarks for S. brevisulcatus sp. nov. below), and the dorsal margin of the ultimate pleuron protruding from the lateral side of tergite 23 ( Fig. 7E ) (vs dorsal margin flattened) (see Table 3).

Distribution

Known from Kyushu, and Amami Island in the Ryukyu Islands.

Figures

Fig. 3. Scolopocryptops miyosii sp. nov., paratype, ♂ (KUZ Z4376) and habitat at the type locality. A. Habitat (laurel tree forest) in Kagoshima, Kyushu. B. Live specimen, dorsal view. Scale bar = 10 mm.

Fig. 4. Scolopocryptops miyosii sp. nov. A, C. Holotype, ♂ (KUZ Z4375). B, D. Paratype, ♀ (KUZ Z4377). A–B. Basal articles of left antenna, dorsal view. C–D. Cephalic plate, dorsal view; arrowheads indicate left cephalic marginal sulcus. Scale bars = 1 mm.

Fig. 5. Scolopocryptops miyosii sp. nov., holotype, ♂ (KUZ Z4375). A. Cephalic plate and tergite 1, dorsal view. B. Distal part of article 2, article 3, and pretarsus of left second maxilla, medial view. C. Article 3 and pretarsus of left second maxilla, lateral view. D. Head, ventral view. Abbreviations: am = anterior margin of forcipular coxosternite; bs = basal suture on forcipular trochanteroprefemoral process; db = dorsal brush on article 3 of second maxilla; ds = dorsal spur on article 2 of second maxilla; pt = pretarsus of second maxilla; ptr = process of forcipular trochanteroprefemur; t = tooth on anterior margin of forcipular coxosternite. Scale bars: A, D = 1 mm; B–C = 0.2 mm.

Fig. 6. Scolopocryptops miyosii sp. nov., holotype, ♂ (KUZ Z4375). Forcipules and coxosternite, ventral view. Abbreviations: am = anterior margin of forcipular coxosternite; bs = basal suture on forcipular trochanteroprefemoral process; md = median diastema; op = outer part of anterior margin of forcipular coxosternite; ptr = process of forcipular trochanteroprefemur; t = tooth on anterior margin of forcipular coxosternite. Scale bar = 1 mm.

Fig. 7. Scolopocryptops miyosii sp. nov., holotype, ♂ (KUZ Z4375). A. Cephalic plate and tergites 1–8, dorsal view. B. Sternites 10–14, ventral view. C. Sternite 23, ventral view. D. Right coxopleuron, lateral view. E. Tergite 23, dorso-lateral view. Abbreviations: cxp = coxopleural process; dm = dorsal margin of ultimate pleuron; mds = minute dark spine on ultimate pleuron; tm = tergal margination; tps = tergal paramedian suture. Scale bars: A–B = 5 mm; C–E = 1 mm.

Fig. 8. Scolopocryptops miyosii sp. nov. A–B. Holotype, ♂ (KUZ Z4375). C. Paratype, ♀ (KUZ Z4377). A. Right ultimate leg, lateral view. B. Male genital segments, lamina subanalis, and anal valves, ventral view. C. Female genital segment, lamina subanalis, and anal valves, ventral view. Abbreviations: av = anal valve; ls = lamina subanalis; sgs I = sternite of genital segment 1; sgs II = sternite of genital segment 2. Scale bars: A = 2 mm; B–C = 0.5 mm.

Fig. 1. Map showing the collection localities of Scolopocryptops elegans (Takakuwa, 1937), S. miyosii sp. nov., S. brevisulcatus sp. nov., and S. curtus (Takakuwa, 1939) in the present study and Jonishi & Nakano (2022).Orange circles:S. elegans; pink diamonds:S. miyosii sp. nov.; red squares:S. brevisulcatus sp. nov.; yellow triangles: S. curtus; black triangles: localities of the sequence data of S. curtus obtained from INSD (see Table 1). Shapes with two lines indicate the type localities of each species (S. curtus from its type locality was not examined). Locality numbers (E1–E5, M1–M5, B1–B4, C1 and C2) are shown in Fig. 2 and Table 1.