Sisor Hamilton, 1822
publication ID |
z01345p001 |
DOI |
https://doi.org/10.5281/zenodo.6254010 |
persistent identifier |
https://treatment.plazi.org/id/BB1BE4CE-F5BF-4512-E95A-51404BFF04D9 |
treatment provided by |
Thomas |
scientific name |
Sisor Hamilton, 1822 |
status |
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Sisor Hamilton, 1822 View in CoL View at ENA ZBK
Fig. 13
Sisor Hamilton, 1822 ZBK : 208, 379. (Type species Sisor rabdophorus Hamilton, 1822 ZBK , by monotypy). Gender masculine.
Diagnosis: Series of bony plates extending from dorsal fin to base of caudal fin; spine in adipose fin; uppermost caudal-fin ray long, more than half length of body; branchiostegal membranes broadly fused to isthmus; outer and inner mental barbels widely separated, with origin of outer barbels anterior to origin of inner barbels; minute teeth in lower jaw, dentition essentially consisting of roughened plate; large serrations on anterior margin of pectoral spine; well-developed maxillary barbel membrane; palatal teeth absent.
Sisor ZBK is distinguished from erethistids and all other sisorids by having a series of bony plates extending from the dorsal fin to the base of the caudal fin, and an adipose fin with a spine. It is distinguished from all other Sisorinae by having the uppermost caudal-fin ray long (vs. short), more than half the length of the body; outer and inner mental barbels widely separated, with the origin of the outer barbels anterior to the origin of the inner barbels (vs. nearly in a straight line in Gagata ZBK , origin of inner mental barbels anterior to origin of outer mental barbels in Bagarius ZBK and Gogangra ZBK , and either nearly in a straight line or origin of inner mental barbels anterior to origin of outer mental barbels in Nangra ZBK ), by having minute teeth in the lower jaw (dentition essentially consisting of a roughened plate vs. teeth of the lower jaw markedly heterodont in Bagarius ZBK , and small and conical in Gagata ZBK , Gogangra ZBK , and Nangra ZBK ), and by having large serrations on the anterior margin of the pectoral spine (vs. no serrations in Bagarius ZBK , Gagata ZBK , and Nangra ZBK , and small serrations in Gogangra ZBK ).
Sisor ZBK is further distinguished from Bagarius ZBK , Gogangra ZBK and Nangra ZBK by having the branchiostegal membranes broadly fused to the isthmus (vs. free from the isthmus). Sisor ZBK is further distinguished from Gagata ZBK and Gogangra ZBK by having a well-developed maxillary barbel membrane, and from Nangra ZBK by its lack of palatal teeth and short maxillary barbel not reaching the pectoral-fin base (vs. barbel reaching to at least the pelvic-fin base).
Description: Dorsal fin with 1 spine, 5-6 dorsal rays; pectoral fin with 1 spine, 9-11 rays; 6-8 pelvic-fin rays; 4-6 anal-fin rays. Head moderately narrow, strongly depressed. Body extremely narrow, strongly depressed. Eyes small, dorsolateral, subcutaneous. Maxillary barbel not extending posteriorly beyond head; barbel with well-developed membrane, stiff base. Coracoid process present but short. Pectoral-fin spine strongly serrate anteriorly and posteriorly. Dorsal-fin spine finely serrate anteriorly, smooth posteriorly. No thoracic adhesive apparatus. Paired fins non-plaited.
Distribution: Indus drainage, Pakistan, east to the Ganges and Brahmaputra drainages, India (Ng, 2003; Vishwanath & Darshan, 2005).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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