Research Article
Weight-Length and Length-Length Relationships of the Endangered Zebra Pleco Hypancistrus zebra (Siluriformes, Loricariidae) from the Xingu River, Amazon, Brazil
Figure 1
External sexual dimorphism in two adult zebra plecos. The female (SL = 5.67 cm) presents smaller odontodes on the opercular region (A) and on pectoral spine (B) while the male (5.92 cm) has hypertrophied odontodes on the pectoral spine (C) and (D) opercular region.