Singaporemma lenachanae Lin & Li, 2017

Yan, Fanhu & Lin, Yucheng, 2018, A review of the spider genus Singaporemma (Araneae: Tetrablemmidae), with the description of a new species, Zootaxa 4392 (2), pp. 329-346 : 334-335

Singaporemma lenachanae Lin & Li, 2017

Figures 6D–d , 9B

Singaporemma lenachanae Lin & Li, 2017: 40 , figs 16–18, 19B–I, 20

Examined material. Holotype ♂, paratypes 4♂ and 2♀ (LKCNHM), SINGAPORE: Bukit Timah Nature Reserve, Seraya Loop, 103°46.422′N, 1°21.423′E, altitude 118 m, 17 August 2015, S. Li and Y. Tong leg.

Other material examined. 3♂ and 2♀ ( NHMSU), SINGAPORE: Bukit Timah Nature Reserve, Seraya Loop, 103°46.422′N, 1°21.423′E, altitude 118 m, 17 August 2015, S. Li and Y. Tong leg.

Diagnosis. Male of S. lenachanae can be distinguished from males of all other congeners except for S. banxiaoensis ( Fig. 6B, b ), S. halongense ( Fig. 6A, a ) and S. singulare ( Fig. 6C, c ) by the unbranched embolic tip, and the narrow, straight embolus ( Fig. 6D, d vs. Fig. 6E–H, e–h ). It differs from male of S. banxiaoensis by the lower ventral initial position of embolus ( Fig. 6D vs. Fig. 6B ), the wider embolic tip ( Fig. 6d vs. Fig. 6b ). From male of S. halongense by the smaller palpal tibia ( Fig. 6D vs. Fig. 6A ), and the smoother, no curved edge of embolic tip ( Fig. 6d vs. Fig. 6a ). From male of S. singulare by the blunt embolic tip ( Fig. 6d vs. Fig. 6c ), the shorter palpal bulb and the lower ventral initial position of embolus ( Fig. 6D vs. Fig. 6C , higher position indicated by a blue arrow). Female of S. lenachanae can be distinguished from the females of all other congeners except for S. singular by the absence of central process ( Fig. 9B vs. Figs 2E , 5C–D , 7A–C , 8A–B ). Female of S. lenachanae is closer to S. singulare in having similar configuration of vulva ( Fig. 9A–B ), but it differs from S. singulare by the longer lateral horns and the wider, straight vulval ducts ( Fig. 9B vs. Fig. 9A ).

Description. See Lin et al., 2017: 40.

Distribution. Singapore ( Fig. 10 ).

Figures

FIGURE 2. Singaporemma bifurcata Lin & Li, 2010 A, male left palp, prolateral; B, ditto, retrolateral; C, female opisthosoma, ventral; D, genital area, ventral; E, genital area (lactic acid-treated), ventral. Scale bars: 0.20.

FIGURE 5. Singaporemma takensis sp. n. female paratype. A, opisthosoma, ventral; B, genital area, ventral; C, genital area (lactic acid-treated), ventral; D, vulva (lactic acid-treated), dorsal. Scale bars: 0.20 for A–B, 0.10 for C–D.

FIGURE 6. Singaporemma spp. male left palp (A–H) and embolic tips (a–h). A–a, S. halongense (paratype); B–b, S. banxiaoensis (holotype); C–c, S. singulare (holotype); D–d, S. lenachanae (paratype); E–e, S. wulongensis (holotype); F–f, S. bifurcata (topotype); G–g, S. takensis sp. n. (holotype); H–h, S. adjacens (holotype, photographed by Dr. Seppo Koponen). A– G, a–g, prolateral; H, h, retrolateral. Scale bars: 0.10 for A–H, 0.05 for a–h.

FIGURE 7. Singaporemma spp. female genital area and cleared vulva (A–C). A, S. adjacens B, S. halongense C, S. banxiaoensis (paratype); A–B, ventral (cited from Lehtinen, 1981, slightly modified); C, dorsal. Scale bars: 0.10.

FIGURE 8. Singaporemma spp. female genital area and cleared vulva (A–B). A, S. bifurcata (topotype); B, S. wulongensis (paratype); A–B, ventral. Scale bars: 0.10.

FIGURE 9. Singaporemma spp. female genital area and cleared vulva (A–B). A, S. singulare (specimen from type locality); B, S. lenachanae (paratype); A–B, ventral. Scale bars: 0.10.

FIGURE 10. Distribution records of Singaporemma spp. in the world. White balloon—S. adjacens; Blue balloon—S. banxiaoensis; Red-black circle—S. bifurcata; Red round—S. halongense; Red triangle—S. lenachanae; Red balloon—S. singulare; Red-black concentric circle—S. takensis sp. n.; Yellow square—S. wulongensis.