Nasoonaria circinata, 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 : 26-27

Taxon classification Animalia Araneae Linyphiidae

Nasoonaria circinata sp. n. Figs 58, 59, 60, 61

Types.

Holotype ♂: CHINA, Yunnan: Menglun Town: Xishuangbanna Tropical Botanical Garden, 21°55.035'N, 101°16.500'E, elevation ca 558 m, 22.07.2007, primary tropical seasonal rain forest, fogging. Paratypes 1♂1♀, same data as holotype; 1♀, 21°54.718'N, 101°16.940'E, elevation ca 645 m, 5.-12.02.2007, primary tropical seasonal moist forest, Menglun Nature Reserve, hand-collecting; 2♂, 21°55.035'N, 101°16.500'E, elevation ca 558 m, 1.-15.04.2007, primary tropical seasonal rain forest, Menglun Nature Reserve, trunk traps; 2♂2♀, 21°55.035'N, 101°16.500'E, elevation ca 558 m, 16.-31.05.2007, primary tropical seasonal rain forest, pitfall traps; 2♂5♀, 21°54.380'N, 101°16.815'E, elevation ca 620 m, 21.11.2009, G213 Road, bamboo plantation, fogging; 10♂14♀, 21°54.614'N, 101°16.890'E, elevation ca 640 m, 14.11.2009, Lvshilin tropical rain forest, fogging; 4♀, 21°54.714'N, 101°16.935'E, elevation ca 660 m, 16.11.2009, Lvshilin tropical rain forest, fogging; 1♂13♀, 21°54.705'N, 101°16.898'E, elevation ca 664 m, 15.11.2009, Lvshilin tropical rain forest, fogging; 15♀, 21°53.646'N, 101°16.975'E, elevation ca 589 m, 26.11.2009, G213 Road, bamboo plantation, fogging; 3♀, 21°53.622'N, 101°16.955'E, elevation ca 581 m, 26.11.2009, G213 Road, bamboo plantation, fogging; 5♂7♀, 21°53.794'N, 101°17.152'E, elevation ca 594 m, 27.11.2009, G213 road, evergreen forest, fogging; 2♀, 21°54.089'N, 101°17.024'E, elevation ca 570 m, 28.11.2009, G213 road, fogging.

Etymology.

This specific name originates from the Latin word 'circinatus, meaning ‘coiled’, for the long embolus exhibiting coil-like loops; adjective.

Diagnosis.

Male of Nasoonaria circinata sp. n. can be distinguished from the type species by the modified carapace (Fig. 59E), prominent distal suprategular apophysis and the long, coiled embolus in palp (Fig. 58B). The female is distinguished from Nasoonaria sinensis Wunderlich & Song, 1995 by the different pathway taken by the copulatory ducts and by the position of spermathecae (Fig. 60C).

Description.

Male (holotype). Total length: 2.35. Carapace 0.95 long, 0.75 wide, reddish brown, raised into a hump in the middle of the thoracic part, with a row of long setae growing along the axis from the ocular area to the hump. Sternum 0.47 long, 0.47 wide. Clypeus 0.16 high. Chelicerae promargin with 5 teeth, retromargin with 4 teeth. Eye sizes and interdistances: AME 0.06, ALE 0.10, PME 0.08, PLE 0.10, AME-AME/AME 0.50, PME-PME/PME 0.50, AME-ALE/ALE 0.50, PME-PLE/PLE 0.75, coxae IV separated by 1.38 their width. Length of legs: I 4.27 (1.13, 0.30, 0.97, 1.09, 0.78), II 4.15 (1.09, 0.30, 1.13, 1.00, 0.63), III 3.13 (0.76, 0.28, 0.78, 0.78, 0.53), IV 4.01 (1.13, 0.25, 1.00, 1.00, 0.63). Leg formula: I-II-IV-III. TmI 0.61, TmIV 0.69. Tibial spine formula: 2-2-1-1. Palp: tibia cone-shaped, with slightly protruding dorsal apophysis (Fig. 59A) and 2 retrolateral trichobothria. Paracymbium ‘U’ -shaped, with wide base and attenuated, round black apex (Fig. 58B); Embolus long, slim, forming two coils (Fig. 58 A–D). Distal suprategular apophysis broad at base, distally taper (Fig. 58B).

Female (one of paratypes). Total length: 2.50. Carapace 0.90 long, 0.75 wide, similar to that of male in coloration, but slightly lighter, unmodified. Sternum 0.53 long, 0.53 wide. Clypeus 0.15 high. Chelicerae promargin with 6 teeth, retromargin with 4 teeth. Eyes diameter and interdistances: AME 0.08, ALE 0.10, PME 0.08, PLE 0.08, AME-AME/AME 0.25, PME-PME/PME 0.25, AME-ALE/ALE 0.30, PME-PLE/PLE 0.25, Coxae IV separated by 1.36 times their width. Lengths of legs: I 3.96 (1.10, 0.30, 1.06, 0.90, 0.60), II 3.71 (1.00, 0.30, 0.90, 0.88, 0.63), III 3.00 (0.81, 0.28, 0.75, 0.69, 0.47), IV 3.94 (1.06, 0.25, 1.00, 1.00, 0.63). Leg formula: I-IV-III-II. TmI 0.60, TmIV 0.66. Epigyne: ventral fig slightly narrowed mesally (Fig. 60A). Copulatory ducts long and sinuous, extending anteriorly then turning back to connect with spermathecae (Fig. 60C). Spermathecae globular, separated from each other by about 1.5 their diameters (Fig. 60C). Fertilization ducts directed mesally (Fig. 60C).

Distribution.

Known only from type localities.