Dairoidea
Encyclopedia
Dairoidea is a superfamily
of crab
s, comprising two families
which each contain a single genus: Dairidae (the living fossil
Daira ) and Dacryopilumnidae (Dacryopilumnus) .
Dacryoplilumnidae
Taxonomic rank
In biological classification, rank is the level in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories...
of crab
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, comprising two families
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
which each contain a single genus: Dairidae (the living fossil
Living fossil
Living fossil is an informal term for any living species which appears similar to a species otherwise only known from fossils and which has no close living relatives, or a group of organisms which have long fossil records...
Daira ) and Dacryopilumnidae (Dacryopilumnus) .
Species
Dairidae- Daira americana Stimpson, 1860
- Daira coronata Beschin, De Angeli, Checchi & Zarantonello, 2005 †
- Daira depressa (A. Milne-Edwards, 1865) †
- Daira perlata (Herbst, 1790)
- Daira salebrosa Beschin, Busulini, De Angeli & Tessier, 2002 †
- Daira sicula (Di Salvo, 1933) †
- Daira speciosaDaira speciosaDaira speciosa is a species of crab that lived in the Paratethys sea during the Miocene period. It was up to long....
(Reuss, 1871) † - Daira vulgaris Portell & Collins, 2004 †
Dacryoplilumnidae
- Dacryopilumnus eremita Nobili, 1906
- Dacryopilumnus rathbunae Balss, 1932