TY  - JOUR 
T1  - New species of Cetopsidium (Siluriformes: Cetopsidae: Cetopsinae) from the upper rio Branco system in Guyana
JO  - Neotropical Ichthyology
A1  - Vari, Richard P.
A1  - Ferraris Jr., Carl J.
SN  - 1679-6225
UL  - 10.1590/S1679-62252009000300001
VL  - 7 
Y1  - 2009
PB  - Brasil 
ER  -