Article: A new kind of sexual dimorphism in Ordovician ostracodes
Publication: Palaeontology
Volume:
50
Part:
2
Publication Date:
March
2007
Page(s):
495
–
501
Author(s):
Roger Schallreuter and Ingelore Hinz-Schallreuter
Abstract
In Ordovician ostracodes (genus Incisua) a new kind of sexual dimorphism is described, which is the first example among this group with males being the heteromorphs. The valves of males are larger and less frequent than the females, and are characterized by having a furrow in the ventral part. The furrow may have functioned as a device to enable the two sexes to cling together during mating.
