Heptathela sumiyo, Xu, Xin, Ono, Hirotsugu, Kuntner, Matjaz, Liu, Fengxiang & Li, Daiqin, 2019

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 sumiyo sp. nov. Fig. 12

Type material.

Holotype: JAPAN · ♂; Kagoshima-ken, Amami-Oshima, Amami-shi, Sumiyo-cho, Santaro-toge Pass; 28.28N, 129.42E; alt. 360 m; 15 September 2013; D. Li and B. Wu leg.; XUX-2013-293.

Paratypes: JAPAN · 4 ♂♂, 6 ♀♀; same data as for holotype; XUX-2013-287 to 292, 294 to 296B.

Diagnosis.

Males of H. sumiyo sp. nov. can be distinguished from those of H. kanenoi by the spiniform conductor apex ( Fig. 12A, E, F ), from those of H. amamiensis by the narrow and deeper saddle-shaped embolus in the prolateral view ( Fig. 12A, E, F ). Females of H. sumiyo sp. nov. resemble those of the other Amami group Heptathela species but differ from those of H. kanenoi by the tuberculate lateral receptacular clusters that are equal in size, or slightly larger than the inner clusters ( Fig. 12J, K ). H. sumiyo sp. nov. also differs from all other Heptathela species of the Amami group by the following unique nucleotide substitutions in the standard DNA barcode alignment: G (92), C (218), A (227), G (281), C (308), A (363), T (647).

Description.

Male (Holotype). Carapace brown; opisthosoma light brown, with dark brown tergites; cheliceral groove with eleven denticles; seven spinnerets. Measurements: BL 15.40, CL 7.70, CW 6.80, OL 8.00, OW 5.55; ALE> PLE> PME> AME; leg I 23.05 (6.05 + 3.10 + 4.90 + 6.10 + 2.90), leg II 24.46 (6.48 + 3.08 + 5.05 + 6.80 + 3.05), leg III 26.36 (6.10 + 3.20 + 5.05 + 8.20 + 3.81), leg IV 32.70 (8.00 + 3.50 + 6.75 + 9.70 + 4.75).

Palp. Prolateral side of paracymbium unpigmented and unsclerotised, numerous setae and spines at the tip of paracymbium ( Fig. 12 A–C ). Contrategulum with serrated margin ( Fig. 12A, D, E ). Tegulum wide with dentate dorsal extension of terminal apophysis ( Fig. 12F, G ) and blunt terminal apophysis ( Fig. 12B, C, F, G ). Conductor sclerotised and rugose, with several folds and a spiniform apex ( Fig. 12 A–B, E–F ). Embolus largely sclerotised, with a wide and flat opening, the distal part slightly sclerotised, and narrow and deep saddle-shaped in the prolateral view ( Fig. 12A, D–F ).

Females (N = 6). Carapace and opisthosoma colour as in male; cheliceral groove with 13 or 14 pronounced denticles; tergites similar to those of male; seven or eight spinnerets. Measurements: BL 11.70-15.60, CL 6.25-7.55, CW 5.40-6.43, OL 5.40-8.80, OW 4.00-7.35; ALE> PLE> PME> AME; palp 12.90 (4.50 + 2.25 + 2.70 + 3.45), leg I 14.44 (4.55 + 2.68 + 2.55 + 3.08 + 1.58), leg II 13.93 (4.09 + 2.49 + 2.35 + 3.20 + 1.80), leg III 15.61 (4.40 + 2.70 + 2.68 + 3.80 + 2.03), leg IV 22.45 (6.20 + 3.20 + 4.15 + 6.10 + 2.80).

Female genitalia. A pair of indistinct depressions on the ventro-lateral part of genital atrium ( Fig. 12J, K ). Two pairs of receptacular cluster along the anterior margin of bursa copulatrix, the medians ovate, the laterals tuberculate, similar or slightly larger than inners, without genital stalks ( Fig. 12 H–K ).

Etymology.

The species epithet, a noun in apposition, refers to the type locality.

Distribution.

The species is known from the Japanese island Amamioshima ( 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 12. Male and female genital anatomy of Heptathela sumiyo sp. nov. A-C 3293 (holotype, short for XUX- 2013 - 293) D-G 3292 H, J 3288 I, K 3296 A palp prolateral view B palp ventral view C palp retrolateral view D-G palp distal view H, I vulva dorsal view J, K vulva ventral view. Scale bar: 0.5 mm.