A New Genus and Species of Dromiid Crab (Decapoda, Brachyura) from the Middle Eocene of South Carolina

A new genus and species of brachyuran decapod crustacean of the family Dromiidae, Quinquerugatus holthuisi, is described from the middle Eocene Tupelo Bay Formation and Santee Limestone in South Carolina. The new genus and species is morphologically similar to the dromiid Cryptodromia spp. but differs from them in having a more rounded carapace, well developed triangular rostrum, better defined grooves, and strong lateral spines.</p

Phylogenetic Analysis and Revised Classification of Podotrematous Brachyura (Decapoda) Including Extinct and Extant Families

A phylogenetic analysis based upon 30 extinct and extant taxa of podotrematous brachyuran decapods using 74 characters shows that Podotremata sensu Guinot, 1977 is not monophyletic and results in a new classification for these crabs. Four new taxa are recognized at the section-level (Homoloida, Torynommoida, Etyoida, and Dakoticancroida) as well as two new families (Basinotopidae and Xandarocarcinidae). Dromiacea as historically defined is redefined herein to exclude Homoloidea. New generic names Noetlingocarcinus and Xandarocarcinus, and Seorsus milleraenew combination also resulted from the work