Retroplumidae

Retroplumidae is a family of heterotrematan crabs, placed in their own (monotypic) superfamily, Retroplumoidea.

==Classification== Eight genera are recognised, of which all but two are only known from fossils: Archaeopus † Rathbun, 1908 Bathypluma de Saint Laurent, 1989 Costacopluma † Collins & Morris, 1975 Cristipluma † Bishop, 1983a Loerentheya † Lőrenthey, in Lőrenthey & Beurlen, 1929 Loerenthopluma † Beschin, Busulini, De Angeli & Tessier, 1996 Retrocypoda † Vía, 1959 Retropluma Gill, 1894