Podotremata

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Cladus: Pancrustacea
Superclassis: Multicrustacea
Classis: Malacostraca
Subclassis: Eumalacostraca
Superordo: Eucarida
Ordo: Decapoda
Subordo: Pleocyemata
Infraordo: Brachyura
Sectio: Podotremata
Superfamiliae: Cyclodorippiodea - Dromioidea - Homolodromioidea - Homoloidea - Raninoidea - †Dakoticancroidea - †Palaeocorystoidea

References

Artal, P.; Guinot, D.; Bakel, B. van; Castillo, J. 2008: Ibericancridae, a new dakoticancroid family (Decapoda, Brachyura, Podotremata) from the upper Campanian (Upper Cretaceous) of Spain. Zootaxa, 1907: 1–27. Abstract & excerpt
Ng, P.K.L.; Guinot, D.; Davie, P.J.F. 2008: Systema Brachyurorum: Part 1. An annotated checklist of extant brachyuran crabs of the world. Raffles bulletin of zoology, supplement (17 ) PDF

Podotremata is a traditionally used section of crabs (Brachyura), now considered to be invalid. It was the smaller grouping of crabs, separate from the larger Eubrachyura section. Morphological and molecular analyses do not reveal a monophyletic Podotremata, but rather that it is paraphyletic, and so the most recent classifications divide "Podotremata" into three sections: Dromiacea, Cyclodorippoidea and Raninoida.[1][2]

This group contains the following superfamilies (with their current sections indicated in parentheses):

Cyclodorippoidea (Cyclodorippoida)
Homolodromioidea (Dromiacea)
Dromioidea (Dromiacea)
Homoloidea (Dromiacea)
Raninoidea (Raninoida)

Here is a cladogram showing the placement of the former members of Podetremata (highlighted in bold) within Brachyura:[3][2]

Brachyura	Dromiacea Raninoida Cyclodorippoida Eubrachyura Heterotremata Thoracotremata

References

Sammy De Grave; N. Dean Pentcheff; Shane T. Ahyong; et al. (2009). "A classification of living and fossil genera of decapod crustaceans" (PDF). Raffles Bulletin of Zoology. Suppl. 21: 1–109.
Ling Ming Tsang; Christoph D. Schubart; Shane T. Ahyong; Joelle C.Y. Lai; Eugene Y.C. Au; Tin-Yam Chan; Peter K.L. Ng; Ka Hou Chu (2014). "Evolutionary History of True Crabs (Crustacea: Decapoda: Brachyura) and the Origin of Freshwater Crabs". Molecular Biology and Evolution. Oxford University Press . 31 (5): 1173–1187. doi:10.1093/molbev/msu068.
Wolfe, Joanna M.; Breinholt, Jesse W.; Crandall, Keith A.; Lemmon, Alan R.; Lemmon, Emily Moriarty; Timm, Laura E.; Siddall, Mark E.; Bracken-Grissom, Heather D. (24 April 2019). "A phylogenomic framework, evolutionary timeline and genomic resources for comparative studies of decapod crustaceans". Proceedings of the Royal Society B. 286 (1901). doi:10.1098/rspb.2019.0079. PMC 6501934. PMID 31014217.