Singaporemma banxiaoensis
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Ordo: Araneae
Familia: Tetrablemmidae
Genus: Singaporemma
Name
Singaporemma banxiaoensis Lin & Li, 2014 sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Material
Holotype ♂, paratypes 5♂ and 10♀ (IZCAS), CHINA, Guangxi: Pingxiang City, Xiashi Town, Xinming Village, Banxiaotun, Banxiao Cave, 22°5.542'N, 106°52.148'E, elevation ca. 175 m, 26 July 2011, Xiaoxiao Wang leg.
Etymology
The specific name refers to the type locality; adjective.
Diagnosis
This new species is similar to Singaporemma halongense Lehtinen, 1981 (see Lehtinen 1981[1]: 31, figs. 43, 49, 54, 58, 62), but can be distinguished by the white vestigial eyespots in both sexes (Figs 4A, C, G–H), the shape of bulb and psembolus in the male (Figs 5A–D, 16C–D), the inverted triangular inner vulval plate and the wide, robust central process (Figs 6C, 20A), and the presence of a rhombic vulval dorsal plate (Figs 6C, 20A) in the female.
Description
Male (holotype). Coloration: body brownish-yellow; legs yellowish-orange.
Measurements: total length 1.02; carapace 0.45 long, 0.36 wide, 0.21 high; abdomen 0.64 long, 0.55 wide, 0.55 high; clypeus 0.16 high; sternum 0.28 long, 0.29 wide. Length of legs: I 1.15 (0.38, 0.12, 0.27, 0.20, 0.20); II 1.13 (0.36, 0.11, 0.27, 0.20, 0.20); III 1.04 (0.30, 0.11, 0.23, 0.20, 0.20); IV 1.35 (0.43, 0.12, 0.34, 0.23, 0.23).
Carapace (Figs 4A–B, G, E) reticulated, margin rugose; eyes white, vestigial; clypeus sloping forward, marginally rounded; cephalic part flat; sternum finely reticulated, margin rugose, with sparse setae. Legs: cuticle striated; all tibiae with 2 trichobothria, and one on metatarsi I–IV. Abdomen (Figs 4A–B, E): dorsal scutum oval, finely reticulated, covered with sparse setae; ventral scutum reticulated; perigenital scutum present; postepigastral scutum slightly recurved; preanal scutum rectangular.
Palp (Figs 5A–D; 16C, D): femoral cuticle sculptured and granulated, approximate 3 times patella in length; tibia strongly swollen, approx. 2.2 times femur in width (Figs 5A, B); cymbium posteriorly narrow and anteriorly wide (Fig. 5C); bulb egg-shaped, its surface with irregular lines (Fig. 5C); embolus long, proximally straight but distally flexible (Figs 16C–D). Female (paratype). Coloration: same as in male.
Measurements: total length 1.11; carapace 0.47 long, 0.38 wide, 0.22 high; abdomen 0.68 long, 0.64 wide, 0.64 high; clypeus 0.14 high; sternum 0.29 long, 0.29 wide. Lengths of legs: I 1.22 (0.41, 0.13, 0.28, 0.20, 0.21); II 1.15 (0.38, 0.12, 0.27, 0.20, 0.20); III 1.06 (0.32, 0.12, 0.24, 0.20, 0.19); IV 1.41 (0.45, 0.13, 0.36, 0.25, 0.23).
Carapace (Figs 4C–D, H and F) as in male; clypeus slightly lower than in male. Legs: the chaetotaxy as in male.
Abdomen (Figs 4C–D, F; 6A): dorsal scutum reticulated, covered with sparse setae; lateral scutum I anteriorly short, not extending beyond posterior rim of operculum; operculum centrally smooth, laterally rugose; postepigastral scutum slightly curved, medially narrow and laterally wide; perigenital plates long; preanal scutum reticulated, rectangular, with sparse serrated setae. Genitalia (Figs 6C; 20A): epigynal pit distinct, oval; vulval posterior margin strongly sclerotized (Fig. 6B); vulval dorsal plate rhombic, fused to vulval posterior margin (Figs 6C; 20A); vulval stem triangular (Fig. 20A); vulval ducts proximally narrow, distally wide; lateral horns and vulval ducts forming a “V”-shape; spermathecae rugose, translucent, and membranous; inner vulval plate inverted triangle, distinctly sclerotized, wider than central process (Figs 6C; 20A); central process contracted basally, medially wide (Fig. 20A).
Variation
Total length from 1.00 to 1.07 in males (n = 6) and from 1.05 to 1.14 in females (n = 10).
Distribution
Known only from the type locality (Fig. 22).
Original Description
- Lin, Y; Li, S; 2014: New cave-dwelling armored spiders (Araneae, Tetrablemmidae) from Southwest China ZooKeys, 388: 35-67. doi
Other References
- ↑ Lehtinen P (1981) Spiders of the Oriental-Australian region. III. Tetrablemmidae, with a world revision. Acta Zoologica Fennica 162: 1-151.
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