Title

New Eocene Hydrocarbon Seep Decapod Crustacean (Anomura: Galatheidae: Shinkaiinae) and its Paleobiology

Publication Title

Journal of Paleontology

Publication Date

9-2008

Document Type

Article

DOI

http://dx.doi.org/10.1666/08-007.1

Keywords

Shinkaia katapsyxis, decapod crustacean, Washington, new species

Disciplines

Earth Sciences | Geology | Paleontology

Abstract

A new decapod crustacean species, Shinkaia katapsyxis, is reported from the Eocene Humptulips Formation of western Washington, USA. The specimens were collected from a hydrocarbon seep deposit that has been well-documented and contains a well-described molluscan fauna. The new occurrence extends the geologic range of the genus Shinkaia Baba and Williams, 1998, and subfamily Shinkaiinae Baba and Williams, 1998, into the Eocene from its only other known occurrences in hydrothermal vent environments in the Pacific Ocean. The range extension of an extant decapod genus into the Eocene is not uncommon and adds to the evidence that the Decapoda may be unusually resistant to extinctions and are distinctly conservative evolutionarily.