Description of a New Fossil Crustacean from the Lower Greensand

Abstract

I regard the Crustacean which I am about to describe with peculiar interest, on account of its belonging to that group of the Brachyura which comprehends the highest forms of the class, and of which hitherto but one species ( Mithracia libinoides , Bell*) has been described as occurring in the fossil state in Great Britain. At present I am only aware of the existence of two specimens of the species which I shall here describe,—one in the collection at the British Museum, the other in that of the Geological Survey of Great Britain; both are from the Lower Greensand of Atherfield in the Isle of Wight, and in each the carapace only is preserved. It is from an examination of these specimens that I have taken the following characters.

A new homolid crab, Zygastrocarcinus carolinasensis n. sp., from the Cretaceous (Campanian) of NE Mexico: implications for paleobiogeography

“…3d). Klompmaker et al 270 270 (7/50) as Mithracites vectensis Gould, 1859, has an abdomen preserved as well. Since the abdomen covers the sternum completely in homolids (see Garassino, 2009, p. 6), it is no surprise that no data on the sterna is available from those species.…”

Treatise Online no. 52: Part R, Revised, Volume 1, Chapter 8M: Systematic descriptions: Infraorder Brachyura, Section Homoloida

“…Mithracites Gould, 1859, p. 237 [*M. vectensis Gould, 1859 fig. 1-3 (Schweitzer & Feldmann, 2011, fig.…”