Coelotes unzenensis, 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 : 87-89

Coelotes unzenensis sp. nov.

[Japanese name: Unzen-yachigumo] ( Fig. 1A–D )

Material examined. Holotype. NSMT-Ar 9848, male,

Mt. Kusenbu, 620 m alt., Unzen city, Nagasaki Prefecture

(32°78.6′N, 130°25.8′E), 24 September 2005.

Allotype. NSMT-Ar 9849, female, Chijiwacho, 210 m alt., Unzen city, Nagasaki Prefecture, 12 March 2005.

Paratypes. NSMT-Ar 9850, 1 male, same data as the holotype; NSMT-Ar 9851, 1 female, Mt . Kinugasa, 710 m alt., Unzen city, Nagasaki Prefecture, 12 March 2005 .

Non-type specimens. All the specimens were collected from Nagasaki Prefecture . Notori, Chijiwacho, Unzen city: 1 female, 12 March 2005; 1 female, 3 December 2005 . Tashirobaru pasture, 610 m alt ., Unzen city: 2 females, 12 March 2005; 1 male, 24 September 2005 . Ikenohara , 760 m alt ., Unzen city: 1 female, 12 March 2005 . Shirakumo Pond , 710 m alt ., Unzen city: 1 female, 12 March 2005 . Issaigyo falls , 600 m alt ., Unzen city: 1 female, 7 October 2005 . Mt . Azuma, 650 m alt., Unzen city: 2 females, 8 October 2005 . Mt . Kusenbu, 820 m alt., Unzen city: 1 male and 1 female, 3 December 2005 . Mt . Iwaya, 210 m alt., Nagasaki city: 1 male, 8 December 2006; 4 females, 12 February 2006 . Mt . Konpira, 230 m alt., Nagasaki city: 3 females, 4 March 2006 . Mt . Kabuto, 280 m alt., Nagasaki city: 1 male, 24 September 2011 . Narumidai , 110 m alt ., Nagasaki city: 1 male, 9 October 2011 . Sakikoba, Sonodamachi , Nagasaki city: 1 female, 9 October 2011 . Kibachimachi , Nagasaki city: 1 male, 3 October 2011; 2 males and 2 females, 23 October 2011 . Kashirakubi, Nishiumicho , Nagasaki city: 1 male and 6 females, 7 December 2011 . Azekaricho , Nagasaki city: 2 females, 7 December 2011 . Hirakoba, Iimoricho, Isahaya city: 1 male, 1 October 2011 . Goban-no-tsuji, Iimoricho, Isahaya city: 1 female, 1 October 2011 . Mt . Kotono-o, 405 m alt., Nagayo town, Nishisonogi county : 1 female, 19 February 2006 .

Diagnosis. Coelotes unzenensis sp. nov. resembles C. bifurcatus Okumura and Ono, 2006 (q.v.) in the structure of the male palpus, i.e., in having a sword-shaped conductor outgrowth process, a broad conductor, an anteriorly originating embolus, a bifurcate median apophysis, and a broad, shallow atrium, but can be easily distinguished from the latter species by the absence of a patellar apophysis in the male palpus and the absence of epigynal teeth.

Description. Holotype (male). Total length 10.6, carapace 5.6 long, 3.8 wide; abdomen 5.0 long, 3.4 wide; sternum 2.9 long, 2.1 wide. Eye sizes: AME 0.17, ALE 0.24, PME 0.20, PLE 0.19. Distances between eyes: AME–AME 0.07, AME–ALE 0.06, PME–PME 0.09, PME–PLE 0.24, AME– PME 0.10, ALE–PLE 0.04. MOA: anterior width 0.41, posterior width 0.49, length 0.47. Leg measurements: I, 15.0 (4.2, 5.2, 3.6, 2.0); II, 13.8 (3.9, 4.5, 3.4, 2.0); III, 12.8 (3.7, 4.0, 3.4, 1.7); IV, 17.3 (4.6, 5.4, 5.0, 2.3).

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

Palpus ( Fig. 1A, B ): patellar apophysis absent; LTA corniculate; RTA broad and flat; cimbial furrow short and indistinctive; median apophysis claw-shaped and slightly bifurcate; conductor robust and somewhat twisted; embolus thick and short.

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

Allotype (female). Total length 16.0, carapace 6.5 long, 4.3 wide; abdomen 9.5 long, 6.4 wide; sternum 3.2 long, 2.4 wide. Eye sizes: AME 0.17, ALE 0.26, PME 0.23, PLE 0.24. Distances between eyes: AME–AME 0.17, AME–ALE 0.14, PME–PME 0.16, PME–PLE 0.34, AME–PME 0.22, ALE– PLE 0.10. MOA: anterior width 0.51, posterior width 0.62, length 0.62. Leg measurements: I, 14.3 (4.1, 4.8, 3.4, 2.0); II, 13.7 (4.0, 4.6, 3.2, 1-9); III, 12.7 (3.5, 4.0, 3.3, 1.9); IV, 17.4 (4.5, 5.7, 5.0, 2.2).

Cheliceral promargin with three teeth and retromargin with two.

Epigynum and endogynum ( Fig. 1C, D ): central portion of epigynal plate funnel-shaped and protuberate; copulatory opening with black circumference, situated posterior to epigynum; epigynal teeth absent; spermathecae roundish, situated close to each other.

Coloration almost same as that of male holotype.

Distribution. Nagasaki Prefecture ( Fig. 2 ). Coelotes unzenensis sp. nov is distributed from Mt. Unzen to Nagasaki city and its environs. It is thus allopatric with respect to C. saikaiensis sp. nov., which inhabits the Nishisonogi Peninsula and Oshima island (see below).

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.