Podotremata
Encyclopedia
In some taxonomic systems, Podotremata is the smaller of the two sections making up the crab
s (Brachyura). Morphological and molecular analyses do not reveal a monophyletic Podotremata, and so the most recent classifications divide "Podotremata" into three sections: Dromiacea
, Cyclodorippoidea
and Raninoida .
This group contains the following superfamilies (with their current sections indicated in parentheses):
Crab
True crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" , or where the reduced abdomen is entirely hidden under the thorax...
s (Brachyura). Morphological and molecular analyses do not reveal a monophyletic Podotremata, and so the most recent classifications divide "Podotremata" into three sections: Dromiacea
Dromiacea
Dromiacea is a group of crabs, ranked as a section. It contains 240 extant and nearly 300 extinct species. Where they are considered to form a monophyletic group, Dromiacea and two other groups of crabs, namely the Raninoida and Cyclodorippoidea, may be collected together into the Podotremata, each...
, Cyclodorippoidea
Cyclodorippoidea
Cyclodorippoida is a group of crabs, ranked as a section. It contains the single superfamily Cyclodorippoidea, which holds three families, Cyclodorippidae, Cymonomidae and Phyllotymolinidae....
and Raninoida .
This group contains the following superfamilies (with their current sections indicated in parentheses):
- CyclodorippoideaCyclodorippoideaCyclodorippoida is a group of crabs, ranked as a section. It contains the single superfamily Cyclodorippoidea, which holds three families, Cyclodorippidae, Cymonomidae and Phyllotymolinidae....
(Cyclodorippoida) - Homolodromioidea (DromiaceaDromiaceaDromiacea is a group of crabs, ranked as a section. It contains 240 extant and nearly 300 extinct species. Where they are considered to form a monophyletic group, Dromiacea and two other groups of crabs, namely the Raninoida and Cyclodorippoidea, may be collected together into the Podotremata, each...
) - DromioideaDromioideaDromioidea is a superfamily of crabs mostly found in Madagascar. The earliest fossils attributable to the Dromioidea date from the Danian....
(DromiaceaDromiaceaDromiacea is a group of crabs, ranked as a section. It contains 240 extant and nearly 300 extinct species. Where they are considered to form a monophyletic group, Dromiacea and two other groups of crabs, namely the Raninoida and Cyclodorippoidea, may be collected together into the Podotremata, each...
) - HomoloideaHomoloideaHomoloidea is a superfamily of dromiacean crabs. The close relation between Homoloidea and Dromioidea is primarily established through ultrastructural characteristics of the sperm ....
(DromiaceaDromiaceaDromiacea is a group of crabs, ranked as a section. It contains 240 extant and nearly 300 extinct species. Where they are considered to form a monophyletic group, Dromiacea and two other groups of crabs, namely the Raninoida and Cyclodorippoidea, may be collected together into the Podotremata, each...
) - RaninoideaRaninoideaRaninoida is a taxonomic section of the crabs, containing a single superfamily, Raninoidea. This group of crabs is unlike most, with the abdomen not being folded under the thorax. It comprises 46 extant species, and nearly 200 species known only from fossils ....
(Raninoida)