A new species of Cynopotamus Valenciennes, 1849 (Characiformes, Characidae) with a key to the species of the genus.
Author
Naércio A. Menezes
text
Zootaxa
2007
1635
55
61
http://www.zoobank.org/urn:lsid:zoobank.org:pub:F1A8B580-6FEF-40F0-BE7D-68CA04F3A07B
journal article
z01635p055
F1A8B580-6FEF-40F0-BE7D-68CA04F3A07B
[[
Animalia
Characiformes
Characidae
Cynopotamus
genus
Cynopotamus Valenciennes
]]
Key to species of
Animalia
Characiformes
Characidae
Cynopotamus
genus
Cynopotamus
1a. Dorsal-fin rays ii,10 (Paraguay, lower Paraná and Uruguay river basins)................................
Animalia
Characiformes
Characidae
Cynopotamus
argenteus
species
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)...................................................................................
Animalia
Characiformes
Characidae
Cynopotamus
juruenae
species
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) ....
Animalia
Characiformes
Characidae
Cynopotamus
essequibensis
species
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).............................................................................................................
Animalia
Characiformes
Characidae
Cynopotamus
xinguano
species
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).........................................................................................................
Animalia
Characiformes
Characidae
Cynopotamus
tocantinensis
species
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) ....
Animalia
Characiformes
Characidae
Cynopotamus
magdalenae
species
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)...............................................
Animalia
Characiformes
Characidae
Cynopotamus
bipunctatus
species
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).................................................................................................
Animalia
Characiformes
Characidae
Cynopotamus
gouldingi
species
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) ...
Animalia
Characiformes
Characidae
Cynopotamus
amazonus
species
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).........................................................................
Animalia
Characiformes
Characidae
Cynopotamus
kincaidi
species
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)......................................................................................................................
Animalia
Characiformes
Characidae
Cynopotamus
atratoensis
species
C. atratoensis
11b. Horizontal scale rows from anal-fin origin to lateral line 25-28; branched anal-fin rays 40-46 (Maracaibo basin, Venezuela).....................................................................................................................
Animalia
Characiformes
Characidae
Cynopotamus
venezuelae
species
C. venezuelae