Ayarnangra Roberts, 2001,

Alfred W. Thomson & Lawrence M. Page, 2006, Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes)., Zootaxa 1345, pp. 1-96: 8-10

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Ayarnangra Roberts, 2001


Ayarnangra Roberts, 2001  ZBK 

Fig. 2

Ayarnangra Roberts, 2001  ZBK  : 83. (Type species: Ayarnangra estuarius Roberts, 2001  ZBK  , by original designation). Gender masculine.

Diagnosis: No thoracic adhesive apparatus; granulate anterior margin on pectoral spine; slender body shape; smooth to granulate anterior margin on dorsal spine; papillate upper lip; moderate gill openings; 13-16 anal rays.

Ayarnangra  ZBK  is distinguished from all other erethistid genera by having 13-16 anal fin rays (vs. 8-12) and a granulate (vs. serrated) anterior margin on the pectoral spine. It is further distinguished from Conta  ZBK  , Pseudolaguvia  ZBK  and Caelatoglanis  ZBK  by the absence of a thoracic adhesive apparatus, from Caelatoglanis  ZBK  by having a papillate (vs. plicate) upper lip, from Caelatoglanis  ZBK  and Erethistes  by having a more slender body (Fig. 2), from Caelatoglanis  ZBK  and Pseudolaguvia  ZBK  by having moderate gill openings (vs. wide, nearly meeting one another on the venter), and from Conta  ZBK  by having a granulate (vs. serrated) anterior margin on the dorsal spine and moderate gill openings (vs. extremely narrow gill openings not extending onto venter).

Remarks: Roberts (2001) diagnosed Ayarnangra  ZBK  as a genus of Sisoridae  .

Description: Dorsal fin with 1 spine, 6 rays; pectoral fin with 1 spine, 5-6 rays; 6 pelvic-fin rays, 13-16 anal-fin rays, first 7-8 rays simple; 16 principal caudal rays. Body elongate. Eyes very small, nostrils huge, much larger than eye. Palatal teeth absent. Maxillary barbel with well-developed membrane, soft base; extending slightly beyond pectoral-fin spine origin. Bases of outer and inner mental barbels nearly parallel. Gill openings moderate; branchiostegal membranes broadly fused to isthmus. Pectoral girdle with large coracoid process externally visible. Pectoral-fin spine with finely granulated anterior edge, serrated posterior edge. Dorsal spine granulated anteriorly, with small serrations posteriorly. No thoracic adhesive apparatus. Paired fins non-plaited.

Distribution: Irrawaddy River drainage, Myanmar (Roberts, 2001).