A new genus and two new species of dactylogyrid monogeneans from gills of Neotropical catfishes (Siluriformes: Doradidae and Loricariidae)

Author(s)

Acosta, Aline Angelina ^[1] ; Scholz, Tomas ^[2] ; Blasco-Costa, Isabel ^[3] ; Alves, Philippe Vieira ^{[2, 4]} ; da Silva, Reinaldo Jose ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Inst Biosci, Dept Parasitol, Rua Prof Doutor Antonio Celso Wagner Zanin 250, BR-18618689 Botucatu, SP - Brazil

^[2] Czech Acad Sci, Biol Ctr, Inst Parasitol, Branisovska 31, Ceske Budejovice 37005 - Czech Republic

^[3] Nat Hist Museum Geneva, POB 6134, CH-1211 Geneva - Switzerland

^[4] Univ Fed Rural Rio de Janeiro, Programa Posgrad Biol Anim, Rodovia BR 465, Km 7, BR-23851970 Seropedica, RJ - Brazil

• Document type: Journal article
• Source: Parasitology International; v. 67, n. 1, p. 4-12, FEB 2018.
• Web of Science Citations: 9

Abstract

A new genus of dactylogyrid monogeneans (Ancyrocephalinae), Paracosmetocleithrtun n. gen., is erected to accommodate P. trachydorasi n. sp. from Trachydoras paraguayensis (Siluriformes: Doradidae) in the Upper Parana River basin, Brazil. The new genus differs from Neotropical dactylogyrids in the presence of a well-developed ornamentation in the middle portion of the ventral bar, and a sclerotized patch on the surface of the dorsal bar with an inconspicuous medial process that possesses two submedial projections arising from the tapered ends of this patch. In addition, Demidospermus rhinelepisi n. sp. is described from Rhinelepis aspera (Siluriformes: Loricariidae). The new species, which is the fifth species of the genus described from loricariids, can be differentiated from congeners by the possession of a sclerotized patch attached to the middle portion of the ventral bar, and by morphology of the accessory piece, which presents broad ends, tapering in the centre, rounded proximal end, distal end folding on both sides with folds extending to approximately 3/4 of the accessory piece length. Molecular data on both new species are also provided and species composition of Demidospermus, recently revealed as polyphyletic by molecular studies including the present one, is discussed. (AU)

• FAPESP's process: 15/22382-8 - Biodiversity of helminth parasites of the Siluriformes dominant species from the Aguapeí River, RPPN Foz do Rio Aguapeí, municipality of Castilho, Sao Paulo, Brazil
• Grantee: Aline Angelina Acosta
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 12/22895-7 - Helminth biodiversity of dominant fish species from Aguapeí River, RPPN Foz do Aguapeí, São Paulo State, Brazil
• Grantee: Aline Angelina Acosta
• Support Opportunities: Scholarships in Brazil - Doctorate