Open Access Kent State (OAKS)

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.

Podotrematous crabs from the Cretaceous worldwide are examined and reassigned, resulting in Vespridromites new genus, Notiodromia new genus, and Antarctiprosopon new genus, and seven new combinations. Torynommidae is severely restricted. Longodromitidae as currently recognized extends into the Eocene and has a well-established Cretaceous record.

Cycloprosopon Lőrenthey in Lőrenthey & Beurlen, 1929, is redefined and referred to the Goniodromitidae Beurlen, 1932. Four new species, Cycloprosopon conspicuum, C. devexum, C. octonarium, C. stenofrons, as well as two new combinations, Goniodromites transsylvanicus (Lőrenthey in Lőrenthey & Beurlen, 1929) and Eodromites dobrogea (Feldman, Lazǎr & Schweitzer, 2006), resulted from the revision. Representatives of Eodromites often retain wellcalcified elements of the appendages and lateral portions of the carapace, unusual among Jurassic brachyurans.