Articles

 

Boletín de la Sociedad Geológica Mexicana

Volumen 62, núm. 2, 2010, p. 263-279

http://dx.doi.org/10.18268/BSGM2010v62n2a6

On some Panamerican Cretaceous crabs (Decapoda: Raninoida)

Francisco J. Vega1,*, Torrey Nyborg2, Greg Kovalchuk3, Javier Luque4,5, Alexis Rojas-Briceño6, Pedro Patarroyo6, Héctor Porras-Múzquiz7, Adam Armstrong8, Hermann Bermúdez9, and Luis Garibay10

1Instituto de Geología, UNAM, Ciudad Universitaria, México, D.F., Mexico.
2Department of Earth and Biological Sciences, Loma Linda University, Loma Linda CA, 92350, USA.
3 1401 Chinook Street, The Dalles, OR 97058, USA.
4 Smithsonian Tropical Research Institute. Center for Tropical Paleoecology and Archaeology. Apartado Postal 0843-03092, Balboa, Ancon, Panama.
5Département de sciences biologiques, Université de Montréal, Montréal QC, Canada.
6Departamento de Geociencias, Universidad Nacional de Colombia, A. A. 14490, Bogotá, Colombia.
7Museo de Múzquiz A. C., Zaragoza 209, Múzquiz, Coahuila, 26340, Mexico.
8306 Hilltop Road, Keene, TX, 76059, USA.
9 Carrera 57 No 134-20, torre 3 Apto 1004. Bogotá D.C., Colombia.
10Unidad Académica de Ciencias de la Tierra, UAG, Exhacienda de San Juan Bautista S/N, Taxco el Viejo, Guerrero, 40200, Mexico.

* This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

Decapod crustacean specimens recently collected from new and previously reported localities of USA, Mexico, and Colombia, as well as a review of species of uncertain affinity, add important information to complete the descriptions and paleobiological knowledge of some Cretaceous primitive crabs. The stratigraphic range for the genus Cenomanocarcinus is formally extended from the upper Albian to Campanian, based on occurrences from Colombia, Oklahoma and Mexico. Specimens of Cenomanocarcinus vanstraeleni from the Turonian of Mexico and Colombia include features not described previously for this species, such as variation in the shape and ornament of chelae. Necrocarcinus renfroae is here included in the genus Cenomanocarcinus, based on features of dorsal and ventral carapaces, as well as shape of pereiopods, and its occurrence is documented from the upper Albian of Colombia. Orithopsis tricarinata is reported for the first time in America from upper Albian deposits of Oregon and Colombia; the shape of the sternum confirms close affinities with the Cenomanocarcinidae and the family Orithopsidae is here included in the section Raninoida and restricted to the genus Orithopsis.

Keywords: Crustacea, Raninoida, Cretaceous, North America, South America.