Cynopotamus Valenciennes

Naércio A. Menezes, 2007, A new species of Cynopotamus Valenciennes, 1849 (Characiformes, Characidae) with a key to the species of the genus., Zootaxa 1635, pp. 55-61: 60

publication ID

z01635p055

publication LSID

lsid:zoobank.org:pub:F1A8B580-6FEF-40F0-BE7D-68CA04F3A07B

persistent identifier

http://treatment.plazi.org/id/8B203347-AAF8-1B0A-6CAE-ED46A590451C

treatment provided by

Thomas

scientific name

Cynopotamus Valenciennes
status

 

[[ Cynopotamus Valenciennes  ZBK  ]] 

Key to species of Cynopotamus  ZBK   

1a. Dorsal-fin rays ii,10 (Paraguay, lower Paraná and Uruguay river basins)................................ C. argenteus   

1b. Dorsal-fin rays ii,9 (very rarely ii,10)..........................................................................................................2 

2a. Perforated lateral-line scales 85-90; horizontal scale rows from dorsal-fin origin to lateral line 17-18 (upper rio Juruena, Mato Grosso, Brazil)................................................................................... C. juruenae  ZBK   

2b. Perforated lateral line scales 91-125; horizontal scale rows from dorsal-fin origin to lateral line 20-31.. 3 

3a. Horizontal scale rows from anal-fin origin to lateral line 17-21.................................................................4 

3b. Horizontal scale rows from anal-fin origin to lateral line 22-30.................................................................5 

4a. Developed gill-rakers on first branchial arch 8-9; branched anal-fin rays 36-43 (rivers of Guyana, French Guiana and Surinam and rio Branco basin, Roraima and Araguari basin, Amapá, Brazil) .... C. essequibensis  ZBK   

4b. Developed gill-rakers on first branchial arch 10-11; branched anal-fin rays 39-45 (rio Xingu basin, Mato Grosso and Pará, Brazil)............................................................................................................. C. xinguano   

5a. Horizontal scale rows from dorsal-fin origin to lateral line 23-25 (rio Tocantins and rio Araguaia basins, Goiás and Pará, Brazil)......................................................................................................... C. tocantinensis  ZBK   

5b. Horizontal scale rows from dorsal-fin origin to lateral line 25-31..............................................................6 

6a. Perforated lateral line scales 125 or more; branched anal-fin rays 49-51 (rio Magdalena and rio Cauca basins, Colombia) .... C. magdalenae  ZBK   

6b. Perforated lateral-line scales 98-121; branched anal-fin rays 36-49..........................................................7 

7a. Branched anal-fin rays 47-49 ( río Orinoco basin, Venezuela)............................................... C. bipunctatus  ZBK   

7b. Branched anal-fin rays 36-47......................................................................................................................8 

8a. Horizontal scale rows from dorsal-fin origin to lateral line 29-31; branched anal-fin rays 35-38 (rios Tocantins and Araguaia basins)................................................................................................. C. gouldingi  ZBK   

8b. Horizontal scale rows from dorsal-fin origin to lateral line 25-29; branched anal-fin rays 36-47.............9 

9a. Branched anal-fin rays 36-39 (Peruvian Amazon and tributaries of rio Solimões in Brazil) ... C. amazonus   

9b. Branched anal-fin rays 39-47....................................................................................................................10 

10a. Perforated lateral-line scales 98-109; branched pectoral-fin rays 13-15; branched anal-fin rays 39-44 (rios Paraguay and lower Paraná basins, Brazil)......................................................................... C. kincaidi   

10b. Perforated lateral-line scales 110-121; branched pectoral-fin rays 15-17; branched anal-fin rays 40-47 .. ...................................................................................................................................................................11 

11a. Horizontal scale rows from anal-fin origin to lateral line 29-31; branched anal-fin rays 45-47 ( río Atrato basin, Colombia)...................................................................................................................... C. atratoensis   

11b. Horizontal scale rows from anal-fin origin to lateral line 25-28; branched anal-fin rays 40-46 (Maracaibo basin, Venezuela)..................................................................................................................... C. venezuelae