THE GENUS Metabetaeus was describ ed by Borradaile (1898 : 1014) to contain the species originally describ ed by Whitelegge ( 1897: 147 ) as Betaeus minutus. These descriptions and Couriere's subsequent discussion of the genus ( 1899: 374 ) were all based on a series of specimens collected at Funafuti in the Ellice Arch ipelago. Nothing more on either the genus or the species was recorded until...

The present study deals with three species of Alpheus, including two new species, living symbiotically in burrows of innkeeper worms (Echiura: Thalassematidae) on the tropical coasts of the western Atlantic and eastern Pacific Oceans. Alpheus christojferseni n. sp. is described on the basis of four specimens from Atol das Rocas, northwestern Brazil, and one specimen from Bocas del Toro, Caribbe...

Two new species of the caridean family Alpheidae are described from distant Indo-Pacific localities: Automate hayashii sp. nov. from Hakodate Bay, southern Hokkaido, Japan, and Bermudacaris australiensis sp. nov. from the North-West Shelf off Western Australia. Automate hayashii appears closest to the poorly known A. salomoni Coutière, 1908. Bermudacaris australiensis sp. nov., the second speci...

Two new species of infaunal decapod crustaceans are described based on material collected in Bahía Málaga, Pacific coast of Colombia, in 2009. The mud-shrimp Axianassa darrylfelderi sp. nov. (Axianassidae) appears to be most closely related to A. australis Rodrigues & Shimizu, 1992, A. canalis Kensley & Heard, 1990, and A. jamaicensis Kensley & Heard, 1990. The new species may be distinguished ...