Bulletin of the Mizunami Fossil Museum

Bulletin of the Mizunami Fossil Museum Vol. 50, No. 1

A new specimen of the mid-Cretaceous portunoid Eogeryon elegius, preserving complete fronto-orbital features, confirms the preliminary interpretations that were made based on the holotype and complemented with pictures and a cast of a second specimen unavailable for study. The particular fronto-orbital pattern of Eogeryon elegius, can be considered of taxonomic value, and it turns out to be very similar to that of other portunoids from the Late Cretaceous, as well as those of other Cenozoic portunoids, in particular some geryonid genera. These similarities, among others, could suggest a certain degree of phylogenetic relationship, which deserves a more in-depth study to explore this hypothesis.