| Retroplumidae Temporal range: Maastrichtian–Recent |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Crustacea |
| Class: | Malacostraca |
| Order: | Decapoda |
| Infraorder: | Brachyura |
| Section: | Eubrachyura |
| Subsection: | Heterotremata |
| Superfamily: | Retroplumoidea Gill, 1894 |
| Family: | Retroplumidae Gill, 1894 [1] |
| Synonyms | |
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Ptenoplacidae Alcock, 1899 |
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Retroplumidae is a family of heterotrematan crabs, placed in their own (monotypic) superfamily, Retroplumoidea.
Eight genera are recognised, of which all but two are only known from fossils:[2]
Ten species in two genera survive in the deep sea of the Indo-Pacific region:[3]
Fossil specimens ascribed to the Retroplumidae are known from the Late Cretaceous onwards, with Archaeopus antennatus in Coniacian–Maastrichtian rocks in California and Archaeopus ezoensis from Turonian–Maastrichtian rocks from Japan.[4]
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