Characidium xavante da Graça, Pavanelli & Buckup, 2008
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Family:  Crenuchidae (South American darters), subfamily: Characidiinae
Max. size:  2.82 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  South America: Rio Culuene watershed, upper Rio Xingu drainage in Brazil.
Diagnosis:  Dorsal soft rays (total): 12-13; Anal soft rays: 9-10; Vertebrae: 32-33. Belongs to a group of species, including Characidium nupelia, distinguished uniquely by having high number (12-18) of dark vertical bars on the body, each bar having the width of a scale. Diagnosed by a lower number of scales around the caudal peduncle (10 vs. 12 or more in most Characidium species). Differs from Characidium nupelia by its wider interorbital region (interorbital distance 30.1-38.0 vs. 20.5-28.6% HL) and lower caudal peduncle (caudal peduncle depth 35.4-44.9 vs. 46.2-57.8% HL). Additional conspicuous external characters that are not unique but are helpful in the identification of this species include absence of adipose fin, incomplete lateral line, and presence of a dark blotch on the caudal peduncle (Ref. 75787). Description: Dorsal fin iii9; iii,10; Anal fin iii,6. iii,7; Pectoral fin iii,8, iii9, iii,10; Pelvic i7, i8 (Ref. 75787).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (123251)
Threat to humans:  harmless
Country info:   
 

Entered by: Torres, Armi G. - 28.05.08

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