A new species of the genus Ampelisca Krøyer, 1842 is described and illustrated in detail. The specimens were collected from soft bottom at 15 m depth in the northern coast of Santa Margarita Island, Mexico. Ampelisca capetilloi sp. nov. is characterized

A new ampeliscid species (Amphipoda, Gammaridea) was recovered in high densities from a depth of about 480 m at the Mississippi Canyon (28 32' N, 89 49' W). Ampelisca mississippiana is described and illustrated based on specimens collected from the

Mussels cause the deposition of great amounts of suspended matter as faeces and pseudofaeces, which can impact on surrounding communities. The effect of mussel farming on the macrobenthic community under mussel ropes was assessed at Anchieta, Southeast