A new classification of the Xanthoidea sensu lato (Crustacea: Decapoda: Brachyura) based on phylogenetic analysis and traditional systematics and evaluation of all fossil Xanthoidea sensu lato

Abstract

A phylogenetic analysis was conducted including representatives from all recognized extant and extinct families of the Xanthoidea sensu lato, resulting in one new family, Hypothalassiidae. Four xanthoid families are elevated to superfamily status, resulting in Carpilioidea, Pilumnoidoidea, Eriphioidea, Progeryonoidea, and Goneplacoidea, and numerous subfamilies are elevated to family status. The Mathildellidae is moved from the Goneplacidae to the Portunoidea. Diagnoses for all superfamilies and families discussed herein are provided, embracing characters typically used by biologists as well as readily fossilized features of the dorsal carapace, sternum, abdomen, and chelipeds. All genera known from the fossil record at one time referred to the Xanthidae sensu lato, Xanthoidea sensu lato, or Goneplacidae sensu latowere evaluated as to their family level placement and as a result, the family-level placement of many of these genera has been changed herein. Balcacarcinusnew substitute name, is provided herein for BittneriaSchweitzer and Karasawa, 2004.

Molecular Systematics of the Deep-Sea Hydrothermal Vent Endemic Brachyuran Family Bythograeidae: A Comparison of Three Bayesian Species Tree Methods

“…Xanthoidea s. l. is a speciose taxonomic group that comprises many families and genera, and has been subjected to major taxonomic revisions [3], [27]. For example, genera previously assigned to Xanthoidea, are now assigned to the recently erected superfamilies Eriphioidea, Trapezioidea, Carpiliioidea, and Pilumnoidea.…”

An early Miocene deep‐water decapod crustacean faunule from the Vienna Basin (Western Carpathians, Slovakia)

“…Styrioplax occurs exclusively in Miocene deposits of the Central Paratethys (Glaessner 1928; present study), and so far it is considered to be an endemic genus. However, the family Pilumnidae has a rich fossil record with the oldest occurrence from the Maastrichtian (uppermost Cretaceous) of Belgium (Karasawa and Schweitzer 2006). During the Eocene, the family was well established throughout Europe.…”

“…A diagnosis of the family based on characters that are most likely to be preserved in the fossil record was published by Schweitzer (2000) and Karasawa and Schweitzer (2006).…”

“…Members of this family have been recorded frequently in the fossil record. Karasawa and Schweitzer (2006) listed 22 pilumnid genera known from the fossil record up to that date; 13 of them being exclusively fossil. Recently, Karasawa et al .…”

Juvenile development of the crabBathyrhombilasp. (Crustacea, Decapoda, Pseudorhombilidae) from megalopae obtained in the neuston

“…However, its ontogeny is similar to that of species which have already been studied, such as members of the superfamilies Xanthoidea and Eriphioidea (Karasawa & Schweitzer 2006;Ng et al 2008).…”