Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes). Author Alfred W. Thomson Author Lawrence M. Page text Zootaxa 2006 1345 1 96 http://www.zoobank.org/urn:lsid:zoobank.org:pub:25EFA792-7DA4-4E0D-A69A-12591B8422DE journal article z01345p001 25EFA792-7DA4-4E0D-A69A-12591B8422DE Ayarnangra Roberts, 2001 Fig. 2 Ayarnangra Roberts, 2001 : 83. (Type species: Ayarnangra estuarius Roberts, 2001 , 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 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 , Pseudolaguvia and Caelatoglanis by the absence of a thoracic adhesive apparatus, from Caelatoglanis by having a papillate (vs. plicate) upper lip, from Caelatoglanis and Erethistes by having a more slender body (Fig. 2), from Caelatoglanis and Pseudolaguvia by having moderate gill openings (vs. wide, nearly meeting one another on the venter), and from Conta 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). FIGURE 2. Ayarnangra estuarius , UF 148530, 38.6 mm SL. TABLE 2. External traits diagnostic for genera of Erethistidae

Conta	Pseudolaguvia	Caelatoglanis
Adhesive apparatus on thorax	Long; extends nearly to pelvic fin base	Short; not reaching nearly to pelvic fin base; with median depression	Short; not reaching nearly to pelvic fin base; without median depression
Gill openings	Extremely narrow; restricted to pectoral fin base	Wide; nearly meet one another on venter	Wide; nearly meet one another on venter
Anterior margin of pectoral spine	Serrations all directed toward tip of spine	Serrations all directed toward tip of spine	Serrations all directed toward tip of spine
Anterior margin of dorsal spine	Serrated	Smooth to granulate	Smooth to granulate
Body shape	Elongate (Fig. 4)	Elongate (Fig. 8)	Moderately elongate (Fig. 3)
Upper Lip	Papillate	Papillate	Plicate
Anal fin rays	9-10	8-10	8-10

continued.

Erethistes	Erethistoides	Ayarnangra
Adhesive apparatus on thorax	Absent	Absent	Absent
Gill openings	Moderate; extend onto venter	Moderate; extend onto venter	Moderate; extend onto venter
Anterior margin of pectoral spine	Serrations point toward tip, arranged in divergent pairs, or outwardly directed and not divergent (Fig. 6a & b)	Serrations directed toward tip of spine distally and away proximally (Fig. 6c)	Granulate
Anterior margin of dorsal spine	Smooth to granulate	Smooth to granulate	Smooth to granulate
Body shape	Robust (Fig. 5)	Elongate (Fig. 7)	Elongate (Fig. 2)
Upper Lip	Papillate	Papillate	Papillate
Anal fin rays	8-12	9-11	13-16

Remarks: Roberts (2001) diagnosed Ayarnangra 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).