Gonorhynchus, McClelland, 1838

Ciccotto, Patrick J. & Page, Lawrence M., 2016, Revised diagnosis of the genus Gonorhynchus McClelland (Teleostei: Cyprinidae: Labeonini) with redescription of G. latius (Hamilton) and revalidation of G. wattanah (Sykes), Zootaxa 4127 (3), pp. 471-492: 489

publication ID

http://doi.org/10.11646/zootaxa.4127.3.4

publication LSID

lsid:zoobank.org:pub:6F20F72E-AB2E-44BD-AA73-04F739D42E06

DOI

http://doi.org/10.5281/zenodo.6082388

persistent identifier

http://treatment.plazi.org/id/4D4D87EE-FFA3-FFDF-78B3-FCCAFA10311B

treatment provided by

Plazi

scientific name

Gonorhynchus
status

 

Key to Species of the genus Gonorhynchus  

A dichotomous key was constructed for Gonorhynchus   based on data collected here and characters reported in Menon & Jacob (1996) for G. periyarensis   . Species distributions by river basin are provided in parentheses after species names.

1 Triangular rostral flaps present on tip of snout......................................... G. bicor nis (Salween River)  

- Rostral flaps absent................................................................................... 2

2 Large specimens (> 65 mm SL) with tubercles on snout and cheeks............................................. 3

- Large specimens without tubercles....................................................................... 4

3 15–17 rakers on first gill arch, tubercles only on cheeks and snout....................... G. periyarensis (Periyar River)  

- 20–24 rakers on first gill arch, tubercles on head, occasionally extending onto humeral, breast, and predorsal regions.......................................................................... G. wattanah (Bhima and Godavari Rivers)  

4 Thick midlateral stripe coloring entirety of midlateral scales and partially coloring scales above and below; dorsolateral spots, if present, form uniform reticulated pattern; crescent-shaped spot present on 5 th– 6 th lateral-line scales and extending onto ante- rior halves of scales above and below................................ G. burmanicus   (Irrawaddy and Salween Rivers)

- Thick midlateral stripe absent, although thin stripe (less than one scale wide) may be present; dorsolateral spots, if present, forming irregular patches, not uniform reticulated pattern; crescent-shaped spot occasionally present on 5 th– 6 th lateral-line scale.................................................................................................... 5

5 Total lateral-line scales 40 (rarely 36–38); restricted to drainages of the Bay of Bengal................................................................... G. latius   (Ganges, Brahmaputra, Meghna, Subarnarerkha, and Mahanadi Rivers)

- Total lateral-line scales 35–38; restricted to drainages of the Arabian Sea and the Gulf of Oman, and inland endorheic basins in Afghanistan and Iran.................................................................................. 6

6 Rostral fold without fringes....................................................... G. macmahoni (Dasht River)  

- Rostral fold with fringes........ G. diplochilus   (Indus, Sistan, and Helmand Rivers; coastal drainages of the Gulf of Oman)