Solenysa macrodonta, Wang, Fang, Ono, Hirotsugu & Tu, Lihong, 2015

Wang, Fang, Ono, Hirotsugu & Tu, Lihong, 2015, A review of Solenysa spiders from Japan (Araneae, Linyphiidae), with a comment on the type species S. mellotteei Simon, 1894, ZooKeys 481, pp. 39-56 : 45-47

Taxon classification Animalia Araneae Linyphiidae

Solenysa macrodonta sp. n. Figs 3A, 4 C–D

Types.

Male holotype (CNU-J21), Japan, Honshu, Shimane Prefecture, Yunotsu, Nishida, 35°05.06'N, 132°24.10'E, 27 Jul. 2006, coll. Akihisa Andoh. Paratype, 1♀, same data as holotype.

Diagnosis.

The male palp of Solenysa macrodonta sp. n. is similar to those of Solenysa trunciformis sp. n. and Solenysa refrexilis in the presence of a central tooth at the membranous area embedded the radix (Figs 1C, 3A, 6B), the forked apex of the median branch of lamella characteristica and the long spike-shaped posterior branch (Fig. 3 A–B). They can be distinguished from each other by the median part of terminal apophysis, which has a serrate margin in Solenysa macrodonta sp. n. (Fig. 3A), but with two anterior protrusions in Solenysa trunciformis sp. n. (Fig. 3B) and Solenysa refrexilis ( Tu et al. 2007: fig. 1D), which is truncate in the former species and pointed in the latter species. The short epigyne of Solenysa macrodonta sp. n. is similar to those of Solenysa partibilis and Solenysa reflexilis , having the dorsal plate wider than long (Fig. 5D). They can be distinguished from each other by the maximum width in ventral view; at the anterior part in Solenysa partibilis (Fig. 5C), in the middle in Solenysa macrodonta sp. n. (Fig. 4C), and posterior in Solenysa reflexilis (Fig. 4E), which also has a straight posterior margin.

Description.

Male holotype. Total length 1.33. Carapace, 0.8 long, 0.48 wide. Abdomen, 0.53 long, 0.38 wide. Chelicera with four promarginal and two retromarginal teeth. Length of legs: I 2.53 (0.68 + 0.80 + 0.58 + 0.47); II 2.25 (0.60 + 0.66 + 0.50 + 0.49); III 1.69 (0.47 + 0.50 + 0.39 + 0.33); IV 1.98 (0.61 + 0.64 + 0.43 + 0.30). Tm I: 0.23, Tm IV absent. Measurements for the female were not possible since the single specimen was prepared for SEM examination. Other somatic characters are as in the genus description (Fig. 1A, B, E; see also Tu and Li 2006, Tu and Hormiga 2011).

Male palp (Fig. 3B). General male palpal characters are as in the description for the Solenysa mellotteei group. Embolic division (Fig. 6B): radix embedded in the central membranous area connecting with terminal apophysis and lamella characteristica, from where a central tooth protrudes. Median part of terminal apophysis as large sclerite with serrated margin. Anterior branch of lamella characteristica reduced, stout and extending forward following embolus; the median branch ribbon-like, long and slender, dragging backwards, then folding forward, with forked apex, one sharp, one with threaded margin; the posterior long spike-shaped and strongly sclerotized.

Epigyne (Fig. 4 C–D). Twice as wide as long in ventral view, with maximum width in the middle. Posterior margin centrally incised. Dorsal plate wider than long.

Etymology.

The species name is based on the Latin ‘macrodontus’ in reference to the large central tooth protruding from the membranous area connecting with terminal apophysis and lamella characteristica (Fig. 3A).

Distribution.

Japan (Honshu, Fig. 7).