Paikiniana furcata, Zhao, Qingyuan & Li, Shuqiang, 2014

Zhao, Qingyuan & Li, Shuqiang, 2014, A survey of linyphiid spiders from Xishuangbanna, Yunnan Province, China (Araneae, Linyphiidae), ZooKeys 460, pp. 1-181 : 32-34

Taxon classification Animalia Araneae Linyphiidae

Paikiniana furcata sp. n. Figs 73, 74, 75, 76

Types.

Holotype ♂: CHINA, Yunnan: Mengyang Town: Xishuangbanna nature reserve, 22°09.513'N, 100°53.220'E, elevation ca 894 m, 25.06.2013, tropical seasonal rain forest, sieving. Paratypes 4♂9♀, same data as holotype; 1♂10♀, 22°09.776'N, 100°52.565'E, elevation ca 921 m, 26.06.2013, tropical seasonal rain forest, sieving; 4♂1♀, Guanping Town: Xishuangbanna nature reserve, 22°13.646'N, 100°53.348'E, elevation ca 939 m, 27.06.2013, tropical seasonal rain forest, sieving; 1♀, 22°19.461'N, 100°53.429'E, elevation ca 851 m, 28.06.2013, tropical seasonal rain forest, sieving; 1♂, 22°19.463'N, 100°53.429'E, elevation ca 851 m, 29.06.2013, tropical seasonal rain forest, sieving; 3♂, Menghai Town: Mangunzi Village: Xishuangbanna nature reserve, 22°01.772'N, 100°23.711'E, elevation ca 1187 m, 25.06.2013, secondary tropical seasonal rain forest, sieving.

Etymology.

This specific name was taken from the Latin word ‘furcatus’, which means ‘forked’, referring to the bifurcate tip of the distal suprategular process; adjective.

Diagnosis.

The male is easily distinguished from other Paikiniana species by the forked end of distal suprategular apophysis and the slightly acute angle formed by the two retrolateral tibial apophyses (Fig. 73 A–B). The shape of carapace lobe in Paikiniana furcillata sp. n. resembles that in Paikiniana vulgaris (Oi, 1960) ( Oi 1960: fig. 15), but differs from it by the detailed structure of distal suprategular apophysis. The embolic division resembles that in Paikiniana lurida (Seo, 1991) ( Song and Li 2008: fig. 53), but distinguished from it by the shape of embolic basal lobe and tailpiece (Fig. 73C). The female of the new species has a short projection from the dorsal fig (Fig. 75A), short copulatory ducts and large spermathecae (Fig. 75C), and is similar to Paikiniana biceps Song & Li, 2008 ( Song and Li 2008: figs 42-45).

Description.

Male (holotype). Total length: 1.85. Carapace 0.94 long, 0.69 wide, bright orange, with horn-shaped cephalic lobe. Sternum 0.47 long, 0.53 wide. Clypeus 0.16 high. Chelicerae promargin with 4 teeth, retromargin with 4 teeth. Eye sizes and interdistances: AME 0.06, ALE 0.06, PME 0.06, PLE 0.08, AME-AME/AME 0.33, PME-PME/PME 0.33, AME-ALE/ALE 0.10, PME-PLE/PLE 0.13, coxae IV separated by 1.14 times their width. Length of legs: I 2.88 (0.81, 0.25, 0.78, 0.63, 0.41), II 2.78 (0.78, 0.25, 0.75, 0.60, 0.40), III 2.17 (0.62, 0.20, 0.56, 0.49, 0.30), IV 2.85 (0.80, 0.25, 0.79, 0.65, 0.36). Leg formula: I-IV-II-III. TmI 0.46, TmIV 0.63. Tibial and patellar spine formula: 1-1-1-1. Palp: tibia distally broadened, cone-shaped, with 2 retrolateral trichobothria and 2 tibial apophyses forming an acute angle, the distal one flat, triangular, close to the cymbium, the proximal shorter, directed upward (Fig. 73B); paracymbium hook-shaped (Figs 73B, 76B); protegulum membranous (Fig. 73A); distal suprategular apophysis bifurcated at tip (Fig. 73A); embolic basal lobe small, pointed (Fig. 73 C–D); tailpiece of radix leaf-like from the prolateral view (Figs 73A, 76A).

Female (one of paratypes). Total length: 2.22. Carapace 0.97 long, 0.80 wide, same as male in coloration, unmodified. Sternum 0.55 long, 0.58 wide. Clypeus 0.16 high. Chelicerae like in male. Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.08, PLE 0.08, AME-AME/AME 0.13, PME-PME/PME 0.38, AME-ALE/ALE 0.11, PME-PLE/PLE 0.25, coxae IV separated by 1.18 times their width. Length of legs: I 3.06 (0.88, 0.28, 0.82, 0.64, 0.44), II 2.92 (0.84, 0.28, 0.78, 0.63, 0.39), III 2.37 (0.66, 0.23, 0.58, 0.56, 0.34), IV 3.01 (0.88, 0.25, 0.81, 0.69, 0.38). Leg formula: I-IV- II-III. TmI 0.48, TmIV 0.36. Spination as in male. Epigyne: ventral fig basally wide, posterior rim narrowed (Fig. 75A); scapoid tongue-shaped; copulatory ducts short, mesally oriented, spermathecae somewhat elliptical, separated by their minimal diameter (Fig. 75 B–C).

Distribution.

Known only from type localities.

Genus Parameioneta Locket, 1982

Parameioneta : Locket 1982: 375. Type species Parameioneta spicata Locket, 1982 from Malaysia.