250 



Ageneiosus vittatus Steindachner 



Figs. 1, 2, 5, 21, 23, 30, 45-46 



Tables 15-16 



Ageneiosus vittatus Steindachner 1908:64-65 (original description [type locality: Rio 

 Purus, Brazil]);1910:402-403, pi. 9 (brief description). Gosline 1945:25 

 . ; (citation). Fowler 1951:455, fig. 482 (partial synonymy; distribution). Britski 

 1972:110 (citation). Ferraris 1988:125 (citation). Burgess 1989:286 

 (citation). 



Ageneiosus ^T^.: Kopke 1986:393-395 (reproduction in captivity). Royero 1987:16, 

 130, figs. 38-39 (morphology of dorsal fin). 



Ageneiosus sp. cf. marmoratus: Burgess 1989:628 (photograph [misidentification]). 



Diagnosis ;-' 



Ageneiosus vittatus is separated fi-om all congeners except y4 . n. sp., ^4 . .. 

 valenciennesi and A. pardalis by its combination of moderate size, deeply forked tail, 

 encapsulated swimbladder, short anal fin (less than 40 rays), and typically mottled 

 coloration. Perhaps most commonly confused withal, n. sp., both species of which 

 have a superficially similar striped pattern, but distinguished from that species by 

 slightly fewer pectoral-fin rays (11-13 versus 12-15); greater numbers of total (x = 

 46.5 versus 45.4) and preanal (x = 18.4 versus 17.2) vertebrae; more pleural ribs (8- 

 10 versus 7-8); a more robust head and body; and by significant differences in 

 pigmentation. Ageneiosus vittatus is not sympatric with tither A. pardalis or A. ' 

 valenciennesi, and differs from each of those species by morphological differences 

 presented in their respective diagnoses. - 





