Actumnus
Introduction '''''Actumnus''''' is a genus of crabs in the family Pilumnidae. Alongside the 28 extant species, it has a fossil record extending back into the Miocene.
Species ''Actumnus'' contains 28 extant species:*''Actumnus amirantensis'' Rathbun, 1911*''Actumnus anthelmei'' Ward, 1942*''Actumnus arbutum'' Alcock, 1898*''Actumnus asper'' (Rüppell, 1830)*''Actumnus calypso'' (Herbst, 1801)*''Actumnus davoensis'' Ward, 1941*''Actumnus digitalis'' (Rathbun, 1907)*''Actumnus dorsipes'' (Stimpson, 1858)*''Actumnus elegans'' De Man, 1888*''Actumnus fissifrons'' Alcock, 1898*''Actumnus forficigerus'' (Stimpson, 1858)*''Actumnus globulus'' Heller, 1891*''Actumnus granotuberosus'' Garth & Kim, 1983*''Actumnus griffini'' Takeda & Webber, 2006*''Actumnus intermedius'' Balss, 1922*''Actumnus margarodes'' MacGilchrist, 1905*''Actumnus marissinicus'' Takeda & Miyake, 1977*''Actumnus miliaris'' A. Milne-Edwards, 1865*''Actumnus obesus'' Dana, 1852*''Actumnus parvulus'' A. Milne-Edwards, 1865*''Actumnus setifer'' (De Haan, 1835)*''Actumnus setosiareolatus'' Takeda, 1977*''Actumnus similis'' Takeda & Miyake, 1969*''Actumnus simplex'' Rathbun, 1911*''Actumnus squamosus'' (De Haan, 1835)*''Actumnus taiwanicus'' Ho, Yu & Ng, 2001*''Actumnus targionii'' Cano, 1889*''Actumnus tesselatus'' Alcock, 1898Two further species are known only from fossils.
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