Aponetius ogatai, Kamura, 2020

Kamura, Takahide, 2020, A new genus of the subfamily Zelotinae (Araneae: Gnaphosidae), with descrip- tions of two new species from Amami-Ōshima Island, Southwest Japan, Acta Arachnologica 69 (1), pp. 1-9 : 7

Aponetius ogatai n. sp.

[Japanese name: Amami-tsuzura-kemurigumo]

( Fig. 4 A–E)

Type series. Holotype: ♂, Yuwangama, Yamato-son, Amami-Ōshima Is., Kagoshima Pref., Japan (28°20’59”N, 129°25’16”E, elevation about 200 m), 6.VI.2017, K. Oga- ta leg . Paratypes: 1♀, same data as holotype ; 1♀, Nazeasani , Amami-shi, Amami-Ōshima Is., Kagoshima Pref., Japan (28°23’58”N, 129°29’16”E, elevation about 150 m), 5.VI.2017, K. Ogata leg.

Other specimens examined. 5♂ 1♀, Koshuku , Nazeshi (current place name: Naze-koshuku, Amami-shi), Amami-Ōshima Is., Kagoshima Pref., Japan (28°21’45”N, 129°27’38”E, elevation about 250 m), 25.VI–12.VII.2004 (collected by pitfall traps), Y. Watari leg.

Diagnosis. This new species is distinguished from the congeners by the terminal apophysis apically truncated on the male palp, and the recurved ridges situated anteriorly on the epigyne, while the other congeners have a terminal apophysis pointed apically and an epigyne anteriorly with rounded swellings or without remarkable structure.

Description. Measurements based on male holotype and one of female paratypes (from Amami-shi). Body length ♂ 5.16, ♀ 5.92. Carapace length ♂ 2.36, ♀ 2.40; width ♂ 1.86, ♀ 1.84. Abdomen length ♂ 2.80, ♀ 3.52; width ♂ 1.60, ♀ 2.16. Eye sizes: AME ♂ 0.08, ♀ 0.08; ALE ♂ 0.13, ♀ 0.13; PME ♂ 0.08, ♀ 0.08; PLE ♂ 0.09, ♀ 0.12. Distances between eyes: AME-AME ♂ 0.04, ♀ 0.06; AME-ALE ♂ 0.01, ♀ 0.01; PME- PME ♂ 0.05, ♀ 0.07; PME-PLE ♂ 0.04, ♀ 0.04; ALE-PLE ♂ 0.05, ♀ 0.04. MOA anterior width ♂ 0.20, ♀ 0.22; posterior width ♂ 0.21, ♀ 0.23; length ♂ 0.23, ♀ 0.25. Clypeus height ♂ 0.11, ♀ 0.10. Lengths of legs as in Table 1 .

Variation. Body length ♂ 5.12–5.68, ♀ 4.72–6.56. Cara- pace length ♂ 2.32–2.56, ♀ 2.28–2.64; width ♂ 1.80–2.00, ♀ 1.76–1.96. Abdomen length ♂ 2.80–3.20, ♀ 2.44–3.92; width ♂ 1.60–1.76, ♀ 1.60–2.16.

Ventral spines on legs I and II. ♂: tibiae: I 0-0-0, 0-1r-0 or 1r-1r-0, II 0-0-0, 0-1r-0 or 1r-1r-0; metatarsi: I 2-1p-0 or 2-2-0, II 2-1p-0 or 2-2-0. ♀: tibiae: I 0-0-0 or 0-1r-0, II 0-0- 0 or 0-1r-0; metatarsi: I 2-1p-0, 2-1r-0 or 2-2-0, II 2-2-0.

Color. Male: cephalothorax and appendages dark reddish brown, but mouth parts, sternum and coxae of legs paler; abdomen with dorsal and lateral surfaces blackish brown, ventral surface light brown. Female: similar to male, but wholly slightly lighter.

Male palp ( Fig. 4 A–C): terminal apophysis wide with apical part truncated obliquely in ventral view; embolus arising from ventromedian part of bulb; median apophysis relatively small; cymbium with large ridge protruding retrolaterally; retrolateral tibial apophysis long and pointed apically. Epigyne ( Fig. 4 D ) with a pair of recurved ridges situated anteriorly, median plate anteriorly wide and posteriorly narrow. Female internal genitalia ( Fig. 4 E ) with copulatory ducts long, complexly winding and occupying most of vulva.

Distribution. Amami-Ōshima Is., Kagoshima Pref., Southwest Japan.

Etymology. Specific name is dedicated to the collector of the type specimens.

Figures

Fig. 4. Aponetius ogatai n. sp. A, left male palp, ventral view; B, same, retrolateral view; C, same, apical view; D, epigyne, ventral view; E, female internal genitalia, dorsal view. Abbreviations are the same as those in Fig. 1. Scale = 0.2 mm.