Heptathela kanenoi Ono, 1996

Xu, Xin, Ono, Hirotsugu, Kuntner, Matjaz, Liu, Fengxiang & Li, Daiqin, 2019, A taxonomic monograph of the liphistiid spider genus Heptathela, endemic to Japanese islands, ZooKeys 888, pp. 1-50 : 1

Heptathela kanenoi Ono, 1996 Fig. 10

Heptathela kanenoi Ono, 1996: 158 (holotype: male, from Mikyo, Amagi-cho, Tokunoshima, Kagoshima-ken, Japan, collected by M. Owada and S. Kaneno on 2 November 1992, deposited in NMNS, examined); Ono 2009: 80.

Diagnosis.

Males of H. kanenoi can be distinguished from those of all other Amami group Heptathela species by lacking a spiniform conductor apex ( Fig. 10G, I ). Females of H. kanenoi can be distinguished from those of all other Amami group Heptathela species by the inner receptacular clusters larger than the outers ( Fig. 10B, C ). H. kanenoi can also be diagnosed from all other Amami group Heptathela species by the following unique nucleotide substitutions in the standard DNA barcode alignment: A (35), G (38), C (71), C (125), C (224), G (278), T (281), C (288), T (332), G (359), C (396), C (410), G (443), T (449), A (512), C (533), G (557), C (560), C (623), T (641).

Description.

Males (N = 6). Carapace yellow brown; opisthosoma brown, with dark-spotted tergites close to each other; cheliceral groove with 10-13 vestigial denticles; 7 spinnerets. Measurements: BL 9.80-11.60, CL 5.10-6.00, CW 4.60-5.40, OL 5.15-5.60, OW 4.00-4.85; ALE> PLE> PME> AME; leg I 17.85 (4.80 + 2.30 + 3.80 + 4.60 + 2.35), leg II 18.90 (4.90 + 2.30 + 3.80 + 5.20 + 2.70), leg III 20.80 (4.70 + 2.30 + 4.00 + 6.50 + 3.30), leg IV 26.00 (6.20 + 2.50 + 5.10 + 8.20 + 4.00).

Palp. Prolateral side of paracymbium unpigmented and unsclerotised, numerous setae and spines at the tip of paracymbium ( Fig. 10 D–F ). Contrategulum with serrated margin ( Fig. 10 G–I ). Tegulum with dentate dorsal extension of terminal apophysis ( Fig. 10J ) and blunt tegulum terminal apophysis ( Fig. 10I, J ). Conductor base wide and rugose, with several folds and each fold with an apical tooth ( Fig. 10 G–J ). Embolus with a wide and flat opening, the distal part slightly sclerotised, and saddle-shaped in the prolateral view ( Fig. 10 H–I ).

Females (N = 11). Carapace and opisthosoma colour as in male; cheliceral groove with 12-14 pronounced denticles; tergites similar to male; seven or eight spinnerets. Measurements: BL 8.30-12.90, CL 4.30-6.28, CW 3.60-5.40, OL 4.38-6.50, OW 3.70-6.20; ALE> PLE> PME> AME; palp 7.00 (2.50 + 1.35 + 1.55 + 1.60), leg I 7.75 (2.30 + 1.25 + 1.60 + 1.50 + 1.10), leg II 7.60 (2.60 + 1.10 + 1.50 + 1.50 + 0.90), leg III 8.35 (2.45 + 1.50 + 1.10 + 2.00 + 1.30), leg IV 12.15 (3.40 + 1.50 + 2.25 + 3.20 + 1.80).

Female genitalia. A pair of indistinct depressions on the ventro-lateral part of genital atrium. Paired receptacular clusters along the anterior margin of bursa copulatrix, divided into two parts, the inners larger than the outers, without genital stalks ( Fig. 10 A–C ).

Material examined.

JAPAN · 1 ♂, 1 ♀; Kagoshima-ken, Tokunoshima, Amagi-cho, Mikyo; 27.77N, 128.95E; alt. 180 m; 16 September 2013; D. Li and B. Wu leg.; XUX-2013-315 to 316 · 3 ♂♂, 7 ♀♀; Kagoshima-ken, Oshima-gun, Tokunoshima, Tokunoshima-cho, Tokuwase; 27.79N, 129.01E; alt. 150 m; 17 September 2013; D. Li and B. Wu leg.; XUX-2013-323 to 332 · 2 ♂♂, 3 ♀♀; Kagoshima-ken, Tokunoshima, Amagi-cho, Mikyo; 27.77N, 128.95E; alt. 130 m; 17 September 2013; D. Li and B. Wu leg.; XUX-2013-333 to 338.

Distribution.

The species is endemic to the Japanese island Tokunoshima ( Fig. 1C ).

Figures

Figure 1. General somatic morphology of Heptathela kimurai (Kishida, 1920) A dorsal view B ventral view and map showing the sampling localities of Heptathela specimens from Kyushu to central Ryukyus (C).

Figure 10. Male and female genital anatomy of Heptathela kanenoi Ono, 1996 A-C 3338 (short for XUX- 2013 - 338) D-J 3334 A vulva dorsal view B vulva ventral view C vulva distal view D palp prolateral view E palp ventral view F palp retrolateral view G-J palp distal view. Scale bar: 0.5 mm.