title: The status of Quadriacanthus Paperna, 1961 and Anacornuatus Dubey et al., 1991 (Monogenoidea: Dactylogyridae) with redescription of Q. kobiensis Ha Ky, 1968, new geographical records for Q. bagrae Paperna, 1979 and Q. clariadis Paperna, 1961 from India and a note on speciation in Monogenoidea.
abstract: Quadriacanthus Paperna, 1961 is revised and emended. Q. kobiensis Ha Ky, 1968 is redescribed from Clarias batrachus, and Q. bagrae Paperna, 1979 and Q. clariadis Paperna, 1961 are recorded from C. gariepinus, both from the River Gomti, Lucknow. India is a new geographical record for Q. bagrae and Q. clariadis. Anacornuatus Dubey et al., 1991 is considered a junior subjective synonym of Quadriacanthus Paperna, 1961. Quadriacanthus spp. are more specific to their hosts (micro-habitats) than geographical localizations (macro-habitats) suggesting geographical diversification of hosts plays a lesser role in monogenoidean speciation.
authors.affiliation: Department of Zoology, University of Lucknow, Lucknow 226007, U.P., India. amit_tripathi1975@yahoo.co.in
authors.forename: Amit
authors.initials: A
authors.lastname: Tripathi
authors.forename: Nirupama
authors.initials: N
authors.lastname: Agrawal
authors.forename: Keshav C
authors.initials: KC
authors.lastname: Pandey
mesh_terms: D000818:Animals; D002397:Catfishes / Q000469:parasitology*; D005393:Fish Diseases / Q000469:parasitology*; D005880:Gills / Q000469:parasitology; D007194:India; D010986:Platyhelminths; D045483:Rivers; D014200:Trematoda / Q000033:anatomy & histology / Q000145:classification*; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary*