Standard dorsal, lateral and ventral views of Atopochilus savorgnani (CU 90575). Scale bar, 1cm. Several Chiloglanis species exhibit obvious sexual dimorphism of the caudal fin. In the male of this species the upper lobe of the caudal fin is greatly elongated; in females the lobes of the caudal fin are nearly equal in length. Photographs by Thomas R. Vigliotta.