Clubiona bachmaensis, Ono, Hirotsugu, 2009

Ono, Hirotsugu, 2009, Three New Spiders of the Families Clubionidae, Liocranidae and Gnaphosidae (Arachnida, Araneae) from Vietnam, Bulletin of the National Museum of Natural Sciences (A) 35 (1), pp. 1-8 : 2

Clubiona bachmaensis sp. nov.

( Figs. 1-5 )

Diagnosis. This new spider is very unique in having wide head, long opisthosoma and long legs without special hair tuft on tarsus of leg II, especially in the structure of male palpal organ. The tibia of male palp is long and simple with a retrolateral apophysis digitiform, the cymbium is relatively long and the tegulum is also long and simple with a short and spiniform embolus and membranous conductor. This structure closely allied to that in the species of the genus Pteroneta established by Deeleman-Reinhold (2001) on the basis of some species recorded from the Ryukyu Islands, Japan, Sulawesi and Lesser Sunda Islands, Indonesia, Borneo, Malaysia and Brunei, and Singapore. However, these Pteroneta species have somewhat small and short body, short legs, robust chelicerae with developed teeth, and special hair tuft on tarsus of leg II, all of which are different in the new spider. Therefore, the present author put it in the genus Clubiona in a wide sense. The general appearance of the new spider resembles species of Clubiona hystrix group defined by Deeleman-Reinhold (2001).

Type specimen. Holotype: male from Bach Ma National Park , 1225 m in elevation, Thua Thien Hue Province, Central Vietnam, 7-VI- 2002, by sweeping method, H. Ono leg. ( NSMT­ Ar 8352 ) .

Description (holotype). Measurement: Body length 5.45 mm; prosoma length 2.21 mm, width 1.48 mm; opisthosoma length 3.25 mm, width 1.03 mm; lengths of legs [total length (femur+ patella +tibia +metatarsus +tarsus)]: I 7.73 mm (2.06 + 0.75 + 2.48 + 1.69 + 0.75), II 7.62mm (2.06 + 0.79 + 2.43 + 1.63 + 0.71), m 5.51 mm (1.54 + 0.56 + 1.46 + 1.39 + 0.56), IV 8.72mm (2.34 + 0.79 + 2.25 + 2.63 + 0.71).

Prosoma ( Fig. 1 ): Carapace longer than wide (length/width 1.49), head wide and three-fifth the width of carapace, median furrow long. Eyes: the anterior eye row slightly recurved and the posterior row straight in dorsal view, all eyes almost same in size, lateral eyes slightly larger than the median eyes, AME-AME=AME-ALE, PME­ PME>PME-PLE (2:1), clypeus narrow and same as the anterior width of median ocular area, median ocular area wider than long (length/width 0.64), wider behind than in front (anterior width/posterior width 0.30). Labium much longer than wide (length/width 1.50), sternum longer than wide (length/width 1.14). Chelicera furnished with one large and two smaller teeth on promargin of fang furrow, and three teeth on retromargin ( Fig. 2 ).

Legs: Spiniformation: Femora I-IV dorsally 0-1-1-1, prolaterally I-II 0-0-1-1, III-IV 0-0- 1; patellae I-IV dorsally 1-0-1 (apical), III-IV retrolaterally 1; tibiae I-II dorsally 1-0-0-0, ventrally 2-0-2, III-IV dorsally 1-0-1, prolaterally 1-1, retrolaterally 1-0-1, ventrally 1-0-1-0; metatarsi I-II none, III-IV prolaterally 1-1-1 or 1-1-1-1, retrolaterally 1-0-1 (apical) (III) or 1- 1-2 (apical) (IV), ventrally 2-0-1 (apical)(III) or 2-0-1-2 (apical)(IV). Leg formula: IV-I-II-III.

Male palp ( Figs. 3-5 ): Slender and simple; retrolateral apophysis of tibia digitiform; embolus spiniform and short, with indistinct membranous conductor.

Opisthosoma ( Fig. 1 ): Cylindrical, relatively long (length/width 3.15), with some pairs of long hairs.

Coloration and markings: Carapace lemon yellow, chelicerae, maxillae and labium light yellowish brown, sternum white, palps and legs yellowish white. Opisthosoma yellowish white without markings dorsally, pale yellowish white ventrally.

Distribution. Central Vietnam (at present known only from the type locality).

Etymology. The name of the new species is derived from the type locality.

Remark. Female unknown.

Figures

Figs. 1 - 5. Clubiona bachmaensis sp. nov., male holotype (NSMT-Ar 8352). - 1, Pro- and opisthosomata, dorsal view; 2, chelicera, ventral view; 3, palpal tibia and tarsus, ventral view; 4, same, retrolateral view; 5, apical part ofpalpal tibia, dorsal view. Scales: 1 mm (Fig. 1); 0.1 mm (Figs. 2 - 5).