Coelotes saikaiensis, 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 : 89-90

Coelotes saikaiensis sp. nov.

[Japanese name: Saikai-yachigumo] ( Fig. 1E–H )

Material examined. Holotype. NSMT-Ar 9852, male, Mt. Yuri, 110 m alt., Seihi-Oshima island , Nagasaki Prefecture (33°04.0′N, 129°60.6′E), 2 November 2008.

Paratypes. NSMT-Ar 9853–9854, 2 females, same data as the holotype .

Non-type specimens. All the specimens were collected from Nagasaki Prefecture . Type locality: 1 female, 24 November 2007; 2 females, 30 December 2007; 1 male and 1 female, 2 November 2008. Mt . Kashii, 370 m alt., Saikai city: 1 female, 30 December 2007 . Mt . Shira, 200 m alt., Saikai city: 1 male, 11 October 2009 . Nagasaki Bio Park, Seihicho, Saikai city: 1 male, 20 November 2011 . Koh-no-ura, Sotomecho , Nagasaki city: 3 males and 1 female, 9 October 2011 . Katsurayama, Nishiumicho , Nagasaki city: 1 male, 9 October 2011 . Hiratoko, Nishiumicho , Nagasaki city: 1 female, 20 November 2011 .

Diagnosis. Coelotes saikaiensis sp. nov. resembles C. unzenensis sp. nov. in the absence of a patellar apophysis in the male palpus, but can be distinguished from the latter species by other structures of the genital organ in both sexes. The conductor of C. saikaiensis is obliquely elongated in the direction of the base of the cymbium, but that of C. unzenensis is elongated in the direction of the tip of cymbium. Large epigynal teeth exist in C. saikaiensis but are absent in C. unzenensis .

Description. Male (holotype). Total length 10.9; carapace 5.6 long, 3.9 wide; abdomen 5.3 long, 3.3 wide; sternum 2.9 long, 2.2 wide. Eye sizes: AME 0.17, ALE 0.25, PME 0.20, PLE 0.20. Distances between eyes: AME–AME 0.11, AME–ALE 0.08, PME–PME 0.14, PME–PLE 0.27, AME– PME 0.14, ALE–PLE 0.09. MOA: anterior width 0.45, posterior width 0.54, length 0.51. Leg measurements: I, 15.6 (4.2, 5.5, 3.8, 2.1); II, 14.1 (3.9, 4.8, 3.4, 2.0); III, 12.6 (3.4, 4.0, 3.4, 1.8); IV, 17.3 (4.5, 5.7, 5.1, 2.0).

Cheliceral promargin with three teeth and retromargin with two.

Palpus ( Fig. 1E, F ): patellar apophysis absent; LTA small; RTA broad and flat; conductor bifurcate, ventral part with spine-like outgrowth, and dorsal one slightly curved and obliquely pointing in direction of base of cymbium; embolus thick and short.

Coloration: carapace brown, with gray radial flecks; dorsum of abdomen gray, with yellowish-brown chevrons; sternum reddish brown; chelicerae, maxillae, and labium blackish brown; legs brown, without ring flecks.

Female (paratype, NSMT-Ar 9853). Total length 11.4; carapace 5.3 long, 3.6 wide; abdomen 6.1 long, 3.9 wide; sternum 2.6 long, 2.2 wide. Eye sizes: AME 0.13, ALE 0.25, PME 0.25, PLE 0.20. Distances between eyes: AME–AME 0.10, AME–ALE 0.13, PME–PME 0.15, PME–PLE 0.33, AME– PME 0.15, ALE–PLE 0.03. MOA: anterior width 0.35, posterior width 0.55, length 0.48. Leg measurements: I, 14.4 (4.0, 5.2, 3.3, 1.9); II, 12.8 (3.5, 4.5, 3.0, 1.8); III, 12.0 (3.3, 3.8, 3.2, 1.7); IV, 16.5 (4.3, 5.5, 4.7, 2.0).

Cheliceral promargin with three teeth and retromargin with two.

Epigynum and endogynum ( Fig. 1G, H ): epigynal teeth acuminate, conglutinated with thin plate, situated in anterior portion of epigynum; spermathecae narrow in middle, consisting of large anterior portion and small posterior one; copulatory ducts broad, covering whole region of genitalia.

Coloration almost same as that of male holotype.

Distribution. Nagasaki Prefecture (Nishisonogi Peninsula and Oshima island) ( Fig. 2 ).

Etymology. The specific name, an adjective, is derived from the type locality.

Figures

Fig. 1. A–D, Coelotes unzenensis sp. nov.; E–H, C. saikaiensis sp. nov. A–B, NSMT-Ar 9848, holotype, male; C–D, NSMT-Ar 9849, allotype, female; E–F, NSMT-Ar 9852, holotype, male; G–H, NSMT-Ar 9853, paratype, female. A, E, Male palpus, ventral view; B, F, same, retrolateral view; C, G, epigynum; D, H, internal female genitalia. Scales: 0.5mm.

Fig. 2. Map of Kyushu, Japan, showing the distribution of Coelotes unzenensis sp. nov., C. saikaiensis sp. nov., C. koshikiensis sp. nov., and their allied species, C. bifurcates Okumura and Ono, 2006 and C. gotoensis Okumura, 2007.