Limopsis marwicki is an extinct species of marine bivalve mollusc in the family Limopsidae. Fossils of the species date to the Pleistocene in New Zealand.
Description
In the original description, Powell described the species as follows:
The holotype of the species has a height of , length of and a single valve thickness of . It can be differentiated from L. invalida due to L. invalida being narrower, thinner-shelled, smaller, more inflated and having a smooth marginal flange.
Taxonomy
The species was first described by A.W.B. Powell in 1938, who named the species after New Zealand paleontologist John Marwick. The species likely represents a Limopsis lineage that has become extinct, due to differences seen between it and extant New Zealand members of Limopsis. The holotype was collected at a date prior to 1939 by A. W. B. Powell, from lighthouse reef, Castlepoint, Wairarapa, New Zealand, and is held by the Auckland War Memorial Museum.
Distribution
This extinct marine species occurs in Pleistocene (Nukumaruan stage) of New Zealand, dating to 2.40 million years before the present, including the Castlepoint Formation.
References