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Issue: Vol. 4732 No. 1: 11 Feb. 2020
Type: Article
Published: 2020-02-11
DOI: 10.11646/zootaxa.4732.1.8
Page range: 169–176
Abstract views: 80
PDF downloaded: 2

Neotropical Monogenoidea. 63. Atopogyrodactylus praecipuus gen. et sp. n. (Gyrodactylidae), an oviparous gyrodactylid from the external surface
of a bristlenose catfish Ancistrus sp. (Siluriformes: Loricariidae) from the Rondônian Amazon, Brazil

Department of Community & Public Health, College of Health Professions, Campus Box 8090, Idaho State University, Pocatello, Idaho 83209, U.S.A.
Biological Interactions, Departamento de Zoologia, Universidade Federal do Paraná, PR 81531-980; and Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, Brazil.
Biological Interactions, Departamento de Zoologia, Universidade Federal do Paraná, PR 81531-980; and Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, Brazil. E-mail:
Platyhelminthes Monogenoidea Gyrodactylidae oviparous gyrodactylid Atopogyrodactylus n. gen. Atopogyrodactylus praecipuus n. sp. Loricariidae bristlenose catfish Ancistrus sp. Amazon Brazil

Abstract

Atopogyrodactylus n. gen. (Gyrodactylidae) is proposed for Atopogyrodactylus praecipuus n. sp. (type species by monotypy), a protandrous and oviparous gyrodactylid from the external surfaces of an unidentified bristlenose catfish Ancistrus sp. (Siluriformes: Loricariidae) from the head waters of the Rio Candeias in the State of Rondônia, Brazil. The new genus contains species morphologically similar to those of Nothogyrodactylus Kritsky & Boeger, 1991 as shown by members of both genera having accessory copulatory sclerites associated with the male copulatory organ (MCO). Atopogyrodactylus differs from Nothogyrodactylus by its species lacking haptoral bars and having a sclerotized haptoral plate overlying the ventral anchors. The new species most closely resembles Nothogyrodactylus amazonicus Kritsky & Boeger, 1991 by possessing a flared proximal filament on the egg and a single morphologically similar accessory copulatory sclerite associated with an allantoid MCO.

 

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