Distinguished by its unique tail shape and the following associated characters: unusually deep caudal peduncle and electric organ; caudal peduncle depth at end of anal fin contained 12-18 times in LEA (length from snout tip to end of anal-fin base), 0.7-2.5 times in its length, and electric organ depth at end of anal fin about equal to or a little greater than snout length; caudal peduncle abruptly tapering before caudal fin; hemal spines above middle third of anal fin elongate, nearly twice longer than adjacent proximal anal-fin radials; two rows of intermuscular bones visible along ventral and ventrolateral sides of posteriorly deepening electric organ; precaudal vertebrae 13-15 including 4 vertebrae of the Weberian complex (Ref. 93342).