Genus Denticetopsis

Denticetopsis Ferraris, 1996

Denticetopsis can be differentiated from all other members of the Cetopsinae by the following features. The caudal-fin margin is either shallowly-forked or obliquely-truncate with the outmost rays no more than one and one-half times the length of the inner most rays (versus one and three-quarters to two times that length in other genera of the Cetopsinae). The medial most pelvic-fin ray has a membranous attachment to the body for the basal one-third to one-fourth of its length (versus an attachment more typically along the basal one-half of the ray, respectively). The possession of a first pectoral-fin ray that is spinous for the basal one-half of its length further separates Denticetopsis from Cetopsis and Paracetopsis both of which lack a spinous first pectoral-fin ray. Denticetopsis is further distinguished from Cetopsidium in the lack of the dorsal-spine locking mechanism that is present in the latter genus and in the having a lateral line extending either only onto the abdomen or distinctly further posteriorly onto the caudal peduncle (versus terminating above the base of the anal fin, receptively).