The identify of Cancer (Arges) parallelus De Haan, 1833 (Decapoda: Brachyura: Pilumnidae), a fossil crab described from Japan during the 19th century

The revised diagnosis and description are given for Cancer (Arges) parallelusDe Haan, 1833, a fossil crab first described from Japan during the 19th century. The neotype of this species from the Holocene (about 9,000-5,000 ybp) Nanyo Formation of Ise Bay, central Japan, is herein designated. The monotypic genus ArgesDe Haan, 1833 belongs to the pilumnid subfamily Rhizopinae Stimpson, 1858 and has close affinities with TyphlocarcinusStimpson, 1858, a genus of Rhizopinae.