36
2
July
311
317
NÉRAUDEAU, D. 1993. Sexual dimorphism in mid-Cretaceous hemiasterid echinoids. Palaeontology, 36, 2, 311–317.
Didier Néraudeau Fossil hemiasterid echinoids of Hemiaster (Leymeriaster) are sexually dimorphic, females having wider gonopores than males. No other conspicuous morphological differences permit the two sexes to be distinguished, but in certain populations females achieve larger sizes than males and consequently seem hypermorphic. The Palaeontological Association (Free Access)