Bulletin of the Mizunami Fossil Museum, no. 34 (2008), p. 51–71, 3 pls., 8 figs., 1 table. © 2008, Mizunami Fossil Museum Review and additions to the Eocene decapod Crustacea from Chiapas, Mexico Francisco J. Vega1, Torrey Nyborg2 , Marco A. Coutiño3 , and Oscar Hernández-Monzón4 1Instituto de Geología, UNAM, Ciudad Universitaria, Coyoacán, México DF, 04510, Mexico <
[email protected]> 2Department of Earth and Biological Sciences, Loma Linda University, Loma Linda CA, 92350, USA<
[email protected]> 3Museo de Paleontología ¨Eliseo Palacios Aguilera¨, Instituto de Historia Natural y Ecología de Chiapas, Calzada de Los Hombres Ilustres s/n, Parque Madero, 29000, Tuxtla Gutiérrez, Chiapas, Mexico <
[email protected]> 4Facultad de Ciencias, UNAM, Ciudad Universitaria, Coyoacán, México DF, 04510, Mexico <
[email protected]> Abstract Eighteen taxa of decapod crustaceans are described from the Lower Eocene El Bosque and Middle Eocene San Juan formations of the central part of Chiapas, Southeastern Mexico. New taxa for the area are represented by Karasawaia markgrafi new combination, Panopeus veintensis new species, and Tehuacana schweitzerae new species from the Lower Eocene of the El Bosque Formation. A review of previously reported species from these localities result in reclassification and identification of Neocallichirus sp. cf. N. rhinos, Raninoides treldenaesensis, Notopoides exiguus, and Orbitoplax nandachare. Ranina berglundi, Petrochirus sp. and Santeella lillyae are reported for the first time in southern Mexico. Occurrence of Calappilia hondoensis, Verrucoides stenohedra, and Viapinnixa alvarezi is confirmed with new specimens. Due to its poor preservation and incompleteness, specimens of Callianassidae, Diogenidae, Petrochirus sp., Portunidae, and Xaiva? sp. are only referred to high taxonomic levels.