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New genus of crab (Brachyura: Raninoida: Necrocarcinidae) from the upper cretaceous of West Antarctica, with description of a new species

Schweitzer, CE and Feldmann, RM and Lamanna, MC (2012) New genus of crab (Brachyura: Raninoida: Necrocarcinidae) from the upper cretaceous of West Antarctica, with description of a new species. Annals of Carnegie Museum, 80 (2). 147 - 158. ISSN 0097-4463

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Abstract

A new genus of crab from the Late Cretaceous of Antarctica increases diversity within Necrocarcinidae Frster, 1968, and demonstrates what appear to be gradual evolution and sympatric speciation in the southern high latitudes. New taxa include Hadrocarcinus tectilacus, new genus, new species, as well as two new combinations, Hadrocarcinus carinatus (Feldmann et al., 1993) and Hadrocarcinus wrighti (Feldmann et al., 1993). Necrocarcinidae was paleogeographically widespread by the middle Early Cretaceous, but the geographic distribution and diversity of the group increased even further by the middle Late Cretaceous, perhaps as a result of high sea levels and elevated global temperatures at that time. The paleogeographic range and diversity of necrocarcinids decreased during the latest Cretaceous and into the earliest Paleocene (Danian), possibly due to decreases in sea level and global temperatures, restricting the family to the northern high latitudes. Alternatively, apparent diversity trends in Necrocarcinidae may simply reflect available rock volume.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Schweitzer, CE
Feldmann, RM
Lamanna, MC
Date: 1 March 2012
Date Type: Publication
Journal or Publication Title: Annals of Carnegie Museum
Volume: 80
Number: 2
Page Range: 147 - 158
DOI or Unique Handle: 10.2992/007.080.0203
Schools and Programs: Dietrich School of Arts and Sciences > Geology and Planetary Science
Refereed: Yes
ISSN: 0097-4463
Date Deposited: 22 Apr 2014 16:50
Last Modified: 02 Feb 2019 14:55
URI: http://d-scholarship.pitt.edu/id/eprint/21358

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