title: A new Glossocephalus (Crustacea: Amphipoda: Hyperiidea: Oxycephalidae) from deep-water in the Monterey Bay region, California, USA, with an overview of the genus.
abstract: A new species of Glossocephalus, G. rebecae sp. nov., is described from deep-water in the Monterey Bay region of California, Eastern Pacific Ocean. It seems to be associated exclusively with the mesopelagic ctenophore Bathocyroe fosteri. This association has been observed from 541-830 m depth. It is readily distinguished from G. milneedwardsi Bovallius, 1887 by the shape of the eye fields. The retina is organised into a crescent-shaped organ, occupying about one-quarter of the back half of the head, with the crystalline cones projecting both anteriorly and laterally. An updated review of the genus is provided, taking into account the new species, together with an overview of G. milneedwardsi, and three new records of associations with ctenophores for G. milneedwardsi. New observations on the interaction of G. milneedwardsi with one of its ctenophore hosts, Mnemiopsis sp., are also documented.
authors.affiliation: South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia.; Email: wolfgang.zeidler@samuseum.sa.gov.au.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Zeidler
authors.affiliation: University of Miami, Cox Center, 1301 Memorial Drive, Miami, Florida 33146, United States of America.; Email: wbrowne@bio.miami.edu.
authors.forename: William E
authors.initials: WE
authors.lastname: Browne
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; D049628:Body Size; D002140:California; D005260:Female; D008297:Male; D009792:Oceans and Seas; D009929:Organ Size