Xanthoidea

Xanthoidea
Xantho poressa is one of the crabs that will remain in the Xanthoidea even if they are split up
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Crustacea
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Infraorder:	Brachyura
Section:	Eubrachyura
Subsection:	Heterotremata
Superfamily:	Xanthoidea Macleay, 1838
Synonyms
Acidopsoidea Chasmocarcinoidea Euryplacinoidea Goneplacoidea MacLeay, 1838 (disputed) Hexapodoidea (disputed) Notonycoidea Števčić, 2005 Parapilumnoidea Pilumnoidea Samouelle, 1819 (disputed) Pseudozioidea (disputed) Raouloidea Typhlocarcinodoidea Trapezioidea (disputed) Trogloplacinoidea (but see text)

Goneplax rhomboides and its relatives are likely to be moved to the Goneplacoidea

Xanthoidea is a superfamily of crabs. As presented here, it includes the Goneplacoidea, Hexapodoidea, Pilumnoidea, Pseudozioidea and Trapezioidea, though this arrangement has been questioned in recent studies. It is almost certain that some of these proposed superfamilies will eventually gain general acceptance.

The swimming crabs (Portunoidea) are close relatives, and their relationship to the different lineages of Xanthoidea in the wide delimitation is likely to determine the eventual taxonomic fate of the latter. The family Hexapodidae and the recently-validated Mathildellidae for example have been occasionally included in the Portunoidea, while the deepsea crabs (Geryonidae) are usually placed in the Portunoidea but sometimes in the Xanthoidea.

Systematics

Due to the massive taxonomic uncertainties surrounding this superfamily, the list presented here is very preliminary.

Families:

• Carpiliidae
• Chasmocarcinidae (formerly in Goneplacidae, tentatively including Acidopsidae, Parapilumnidae, Raoulidae, Typhlocarcinodidae)
• Conleyidae Števčić, 2005 (formerly in Goneplacidae, as part of Carcinoplacinae)
• Eumedonidae
• Euryplacidae (formerly in Goneplacidae)
• Goneplacidae MacLeay, 1838 (including Notonycidae)
• Hexapodidae
• Mathildellidae Karasawa & Kato, 2003 (formerly in Goneplacidae)
• Menippidae
• Panopeidae
• Pilumnidae (including Galenidae, Tanaocheleidae)
• Planopilumnidae Serène, 1984
• Platyxanthidae
• Progeryonidae Števčić, 2005 (formerly in Goneplacidae, as part of Carcinoplacinae)
• Pseudorhombilidae
• Pseudoziidae
• Scalopidiidae Števčić, 2005
• Trapeziidae (including Domeciidae, Tetraliidae)
• Trogloplacidae
• Vultocinidae Ng & Manuel-Santos, 2007
• Xanthidae

Genera incertae sedis:

• Eucratodes A. Milne-Edwards, 1880 (Euryplacidae?)
• Liagore De Haan, 1833 (Xanthidae?)
• Pilumnoides Lucas, 1844
• Robertsella Guinot, 1969 (Panopeidae?)
• Speocarcinus Stimpson, 1859 (Chasmocarcinidae?)
• Tetraxanthus Rathbun, 1898 (Panopeidae?)

References

• Ng, Peter K.L. & Manuel-Santos, Marivene R. (2007): Establishment of the Vultocinidae, a new family for an unusual new genus and new species of Indo-West Pacific crab (Crustacea: Decapoda: Brachyura: Goneplacoidea), with comments on the taxonomy of the Goneplacidae. Zootaxa 1558: 39–68. PDF abstract and first page