Cynopotamus Valenciennes
Creators: name: Naércio A. Menezes
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Characiformes
Characidae
Cynopotamus

description: [[Cynopotamus Valenciennes]]
Key to species of Cynopotamus
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
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
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
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
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
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
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
description: Published as part of Naércio A. Menezes, 2007, A new species of Cynopotamus Valenciennes, 1849 (Characiformes, Characidae) with a key to the species of the genus., pp. 55-61 in Zootaxa 1635 on page 60