title: The first parasitic copepod from a scaphopod mollusc host.
abstract: A new genus and species of parasitic copepod, Gadilicola daviesi n. g., n. sp., is described based on material found on two different scaphopod host species collected in deep water (2,900-2,910 m) in the Rockall Trough, North East Atlantic. The copepods inhabit the posterior mantle cavity of their scaphopod hosts, Polyschides olivi (Sacchi) and Pulsellum lofotense (M. Sars). Both sexes are described. The female body comprises an unsegmented prosomal trunk and a 2-segmented urosome and is more modified than that of the smaller male which comprises a 4-segmented prosome and 3-segmented urosome. The pattern of sexual dimorphism of the appendages is characteristic of the poecilostomatoid families within the order Cyclopoida. The form of the antenna with the major claws on the second endopodal segment and with the third segment reduced and displaced laterally, is shared with the informal Teredicola-group of genera, but it lacks the distinctive, derived form of mandible shared by these genera. The new genus is treated as the type of a new monotypic family, the Gadilicolidae.
authors: Department of Life Sciences, Natural History Museum, Cromwell Road, London, SW7 5BD, UK, g.boxshall@nhm.ac.uk.
authors: Geoffrey Allan
authors: GA
authors: Boxshall
authors: Myles
authors: M
authors: O'Reilly
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D033342:Copepoda / Q000033:anatomy & histology / Q000145:classification* / Q000502:physiology; D005260:Female; D008297:Male; D008974:Mollusca / Q000469:parasitology*; D013045:Species Specificity
references: Biocell. 2004 Aug;28(2):155-64
references: 15462567
references: Mol Phylogenet Evol. 2007 May;43(2):368-78
references: 17383905
references: Syst Parasitol. 2013 Sep;86(1):77-86
references: 23949652
references: Zootaxa. 2013;3651:1-62
references: 25340192