title: A revision of the genus Paracallisoma Chevreux, 1903 (Crustacea: Amphipoda: Scopelocheiridae: Paracallisominae) with a redescription of the type species of the genus Paracallisoma and the description of two new genera and two new species from the Atlantic Ocean.
abstract: The genus Paracallisoma (Crustacea: Amphipoda) is revised and the type species, Paracallisoma alberti is redescribed based on holotype material supplemented with new material from the region of the type locality. This revision results in the establishment of two new genera, Pseudocallisoma gen. nov. and Haptocallisoma gen. nov., and the description of a new species of Haptocallisoma and a new species of Paracallisoma from the North Atlantic Ocean. An account of all known species within the three genera is given and updated keys to the genera and species are provided.
authors.affiliation: National Oceanography Centre, Southampton, European Way, Southampton SO14 3ZH, UK.; Email: tammy.horton@noc.ac.uk.
authors.forename: Tammy
authors.initials: T
authors.lastname: Horton
authors.affiliation: National Oceanography Centre, Southampton, European Way, Southampton SO14 3ZH, UK.; Email: unknown.
authors.forename: Michael H
authors.initials: MH
authors.lastname: Thurston
mesh_terms: D033304:Amphipoda / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001267:Atlantic Ocean; D049628:Body Size; D017753:Ecosystem; D005260:Female; D008297:Male; D009929:Organ Size