Chilobrachys himalayensis ( Tikader, 1977 ) Siliwal & Raven, 2010

Siliwal, Manju & Raven, Robert, 2010, Taxonomic change of two species in the genus Haploclastus Simon 1892 (Araneae, Theraphosidae), ZooKeys 46 (46), pp. 71-75 : 73-74

Chilobrachys himalayensis ( Tikader, 1977) , comb. n.

Figs. 1–4

Phlogiodes himalayensis . Tikader 1977: 317, f. 36–38; Brignoli 1983: 139. Haploclastus himalayensis Raven 1985: 157

Material examined. Type material: holotype, male, Birch Hill, Darjeeling, Eastern Himalaya, West Bengal, 22-iv-1974, coll. Bijan Biswas, registration number not given, Zoological Survey of India, Kolkata.

Additional information. All measurements in mm. Total length 34. Carapace 17.0 long, 15.0 wide. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 17.0, 8.0, 18.0, 11.0, 8.0, 62.0. II: 14.0, 7.0, 12.0, 10.0, 8.0, 51. III: 12.0, 7.0, 10.0, 11.0, 8.0, 48.0. IV: 17.0, 7.0, 13.0, 16.0, 8.0, 61.0. Palp: 12.0, 6.0, 10.0,–, 3.0, 31.0. Eye diameter: AME 0.6, PME 0.4, ALE 0.8, PLE 0.7; distance between eyes: AME-AME 0.5, PME-PME 2.0, PME-PLE 0.1, AME-ALE 0.4. Sternum 8.0 long and 7.0 wide, oval, three pairs of sternal sigilla. Twelve promarginal chelicerae teeth. Abdomen 17.0 long, 10.0 wide. Spinnerets: both pairs digitiform, posterior median spinnerets 1.5 long; posterior lateral spinnerets 8.0 long (3.0 basal, 2.0 medial, 3.0 apical). Maxillary lyra and cheliceral spinules as in figs 1–2; male palpal organ as in figs 3–4.

Remarks. On examining the stridulatory setae of the type specimen of H. himalayensis , it was found that maxillary lyra had enlarged paddle setae on prolateral side of the maxillae (Fig. 1) and thorn setae on retrolateral side of the chelicerae (Fig. 2), which is a characteristic feature of the genus Chilobrachys Karsch, 1891 rather than the genus Haploclastus Simon 1892 , where the maxillary lyra consists of a transverse row of spinules on the prolateral face of the maxillae (Fig. 5). Therefore, Haploclastus hima-

Figures |–5. Chilobrachys himalayensis ( Tikader, 1977) , male. | Prolateral side of left maxilla showing maxillary lyra 2 Retrolateral side of left chelicerae showing spinules 3 Dorsolateral view of left male palp 4 Ventrolateral side of left male palp 5 Haploclastus kayi Gravely, 1915 , prolateral side of left maxillae showing maxillary lyra.

layensis is transferred here to the genus Chilobrachys based on the stridulatory structure on maxillae and chelicerae.