Abstract
The present study describes Cacatuocotyle papilionis n. sp. (Monogenea, Dactylogyridae) from the skin of the characid fishes Astyanax lacustris (Lütken, 1875) (=Astyanax altiparanae Garutti & Britski, 2000) and Astyanax fasciatus (Cuvier, 1819) (Characiformes, Characidae) from the Southeast of Brazil, supported by morphological and molecular data. The new species differs from all congeners, mainly due to the morphology of the ventral bar (resembling a butterfly), accessory piece, and the number of rings of the male copulatory organ (MCO), comprising a coiled tube with 4.5-5.5 counterclockwise rings. The first molecular data for this monogenean genus is provided in this study, using the partial sequences of the ribosomal gene (28S), as well as providing an identification key to the species.
Acknowledgments
This work was supported by FAPESP - Fundação de Amparo á Pesquisa do Estado de São Paulo (São Paulo Research Foundation) (A.C.Z., grant numbers 2011/23588-8, 2015/11542-4, 2016/07829-9; L.F., grant number 2012/07850-7), CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (the Coordination for the Improvement of Higher Education Personnel) and CAPES/PNPD (L.F.: 17/2016); AUX-PE-PNPD (M.I.M., grant number 3005/2010), the Young Researcher Program PROPE-UNESP (M. I. M., grant number 02/2016); FUNEP - Fundação de Apoio a Pesquisa, Ensino e Extensão (the Research, Teaching and Extension Support Foundation) (grant number 1.01852/2011); R.J.S. was supported by CNPq (grant number 309125/2017-0) and CNPq-PROTAX (grant number 440496/2015-2) / FAPESP (grant number 2016/50377-1). We are grateful to Edmir Daniel Carvalho (in memoriam), Sandro Geraldo de Castro Britto, Diogo Freitas Souza, Marcos Gomes Nogueira, Duke Energy and CELAN (Central Elétrica Anhanguera) for logistical support during the collections.
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