Coelotes iriei, Okumura, 2013

Okumura, Ken-ichi, 2013, Seven New Species of Spiders of the Subfamily Coelotinae (Araneae: Agelenidae) from Kyushu, Japan, Species Diversity 18, pp. 87-97 : 92

Coelotes iriei sp. nov.

[Japanese name: Haiiro-yachigumo] ( Fig. 3E–H )

Material examined. Holotype. NSMT-Ar 9858, male, Mt. Mie, 290 m alt., Honmyocho , Kagoshima city, Kagoshima Prefecture (31°69.6′N, 130°52.5′E), 27 December 2010.

Allotype. NSMT-Ar 9859, female, same data as holotype.

Paratypes. NSMT-Ar 9860, 1 male, Mt. Hinamori, 590 m alt., Kobayashi city, Miyazaki Prefecture, 12 October 2006; NSMT-Ar 9861, 1 female, Takachiho, 1200 m alt ., Makizonocho, Kirishima city, Kagoshima Prefecture, 8 October 2007 .

Non-type specimens. Kumamoto Prefecture: Tsunoyama , Amakusa-shimojima island, 1 male, 25 December 2003, T . Irie leg .; Minakami village, Kuma county , 1 male, 3 October 2009, T . Irie leg . Kagoshima Prefecture: same locality as NSMT-Ar 9861, 4 females, 13 October 2006, 1 female, 4 January 2010; Kirishima-taguchi, 890 m alt ., Kirishima city, 1 female (3 January 2010), 1 female (26 December 2010); Kirishima-taguchi, 850 m alt ., Kirishima city, 1 female, 4 January 2010; Mt . Mie, 1 male and 3 females, same data as holotype; Ohira, Kimotsuki town, Kimotsuki county , 1 female, 29 December 2010; Mt . Hassan, 450 m alt., Kanoya city, 1 male and 2 females, 29 December 2010; Yamadono, 150 m alt ., Nagashima island, 1 female, 27 December 2011; Nishime, Akune city, 1 male, 27 December 2011; Fukata, 150 m alt ., Ichiki-kushikino city, 1 female, 28 December 2011; Sato, Kamikoshiki Island , 1 female, 29 December 2011; Oshima, 80 m alt ., Shimokoshiki Island, 1 female, 29 December 2011; Seo, Shimokoshiki Island , 1 male, 30 December 2011; Katanoura, 270 m alt ., Shimokoshiki Island, 1 male and 1 female, 30 December 2011; Ashihama, Shimokoshiki Island, 1 female, 31 December 2011; Imuta, Kashima town , Shimokoshiki Island , 1 female, 31 December 2011 . Miyazaki Prefecture: Ebino plateau, 1165 m alt ., Ebino city, 2 females, 8 October 2007; Minamimata, 150 m alt ., Aya town, Higashimorokata county , 1 female, 3 January 2010; Toguchi, 500 m alt ., Miikecho, Miyakonojo city, 1 female, 3 January 2010 .

Diagnosis. Coelotes iriei sp. nov. resembles C. decolor Nishikawa, 1973 (q.v.) in having a pale body, a broad and strongly curved conductor of the male palpus, and minute epigynal teeth, but can be distinguished from the latter species by the genital structure. The embolus of the male palpus of C. iriei becomes thin and spirally curved towards the tip, but that of C. decolor is not spiral. The epigynum of C. iriei is deeply hollowed in its posterior portion exactly as in cybaeid spiders, but that of C. decolor is not hollow.

Description. Holotype (male). Total length 11.5; carapace 5.8 long, 4.0 wide; abdomen 5.7 long, 3.3 wide; sternum 3.0 long, 2.3 wide. Eye sizes: AME 0.15, ALE 0.23, PME 0.20, PLE 0.25. Distances between eyes: AME–AME 0.10, AME–ALE 0.10, PME–PME 0.15, PME–PLE 0.23, AME–PME 0.15, ALE–PLE 0.08. MOA: anterior width 0.40, posterior width 0.55, length 0.50. Leg measurements: I, 18.3 (4.8, 6.1, 4.5, 2.9); II, 16.3 (4.4, 5.3, 4.0, 2.6); III, 15.3 (3.9, 4.7, 4.2, 2.5); IV, 21.0 (5.4, 6.4, 6.1, 3.1).

Cheliceral promargin with three teeth on left and four on right, and both retromargins with two teeth.

Palpus ( Fig. 3E, F ): patellar apophysis short; LTA absent; RTA broad; cymbial furrow elongated, about half as long as cymbial length; median apophysis large, spoon-like; conductor broad, spiraled with one loop; embolus enlarged, deeply grooved at origin in lateral view, irregularly crooked, and pointed at tip.

Coloration: carapace yellowish brown, with brown radial flecks; dorsum of abdomen gray, with indistinct chevrons; sternum yellowish brown; chelicerae and labium brown; maxillae reddish brown; leg I brown, leg II yellowish brown, legs III and IV yellowish grey; legs lacking ring flecks.

Female (allotype). Total length 12.2; carapace 5.3 long, 3.3 wide; abdomen 6.9 long, 4.1 wide; sternum 2.5 long, 2.1 wide. Eye sizes: AME 0.13, ALE 0.23, PME 0.18, PLE 0.20. Distances between eyes: AME–AME 0.10, AME–ALE 0.13, PME–PME 0.15, PME–PLE 0.25, AME–PME 0.10, ALE– PLE 0.08. MOA: anterior width 0.36, posterior width 0.51, length 0.41. Leg measurements: I, 14.6 (4.1, 5.0, 3.3, 2.2); II, 13.2 (3.7, 4.3, 3.2, 2.0); III, 12.7 (3.4, 3.9, 3.4, 2.0); IV, 17.2 (4.6, 5.3, 4.9, 2.4).

Cheliceral promargin with three teeth and retromargin with two.

Epigynum and endogynum ( Fig. 3G, H ): atrium small but deeply hollowed; epigynal teeth thin, minute, situated on central plate of epigynum; spermathecal head transparent, visible as single blackish-brown dot at anterior region of epigynum; spermathecae long, X-shaped, connected to spermathecal heads and fertilization ducts; copulatory ducts broad, oval-shaped, medially overlapping each other.

Coloration of carapace and abdomen almost same as that of male holotype; leg I brown, leg II yellowish brown, legs III and IV yellowish grey; legs lacking ring flecks.

Distribution. Kumamoto, Kagoshima, and Miyazaki Prefectures ( Fig. 4 ).

Etymology. The specific name, a noun in the genitive case, is dedicated to Mr. Teruo Irie, who discovered this new species in 2003.

Remark. The coloration and the epigynal form of the new species are dissimilar from those of the type species of Coelotes . It is, nonetheless, placed in Coelotes because its most closely related species, Coelotes decolor , is also classified in this genus ( Nishikawa 1973).

Figures

Fig. 3. A–D, Coelotes koshikiensis sp. nov.; E–H, C. iriei sp. nov. A–B, NSMT-Ar 9856, holotype, male; C–D, NSMT-Ar 9855, paratype, female; E–F, NSMT-Ar 9858, holotype, male; G–H, NSMT-Ar 9859, allotype, female. A, E, Male palpus, ventral view; B, F, same, retrolateral view; C, G, epigynum; D, H, internal female genitalia. Scales: 0.5mm.

Fig. 4. Map of Kyushu, Japan, showing the distribution of Coelotes iriei sp. nov, described in the present paper and its allied species, Coelotes decolor Nishikawa, 1973.