We present an updated classiﬁcation for the entire Crustacea Decapoda, listing all known families and genera organized by higher taxonomic groups and including estimates of the number of species in every genus. All taxonomic names are also linked to the veriﬁed literature in which they were described, the ﬁrst compilation of its kind for the Decapoda. To arrive at this compilation, we began with the classiﬁcation scheme provided by Martin & Davis (2001) for extant families, updated the higher classiﬁcation and included the fossil taxa. The resultant framework was then populated with the currently valid genera and an estimate of species numbers within each genus. Our resulting classiﬁcation, spanning both extant (living) and fossil taxa, is the ﬁrst comprehensive estimate of taxonomic diversity within the entire Decapoda. The classiﬁcation consists of 233 families of decapods containing 2,725 genera and an estimated 17,635 species (including both extant and fossil species). Of the families in our classiﬁcation, 53 are exclusively fossil, 109 contain both fossil and extant species, and 71 are extant only. The current estimate for extant species is 14,756, whereas 2,979 species are known exclusively as fossils.
Hoploparia Albertaensis, a New Species of Clawed Lobster (Nephropidae) from the Late Coniacian, Shallow-Marine Bad Heart Formation of Northwestern Alberta, Canada01/01/2005
A new species of clawed lobster, Hoploparia albertaensis, is reported from the late Coniacian, shallow-marine Bad Heart Formation of northwestern Alberta, Canada. Hoploparia is a well-known, clawed lobster genus with a record extending from Early Cretaceous (Valanginian) to Miocene. Fifty-one species ofHoploparia are known worldwide; 13 from the North American Western Interior Seaway. None of the 12 other Interior Seaway species, of any age, closely resembles the new species. The new species strongly resembles Hoploparia gabbi Pilsbry, 1901 from the upper Santonian–lower Campanian of the U.S. Mid-Atlantic Coastal Plain.