A New Species of Hatschekiid Copepod (Crustacea: Hatschekiidae) Parasitic on the Porkfish Anisotremus virginicus (Linnaeus, 1758) (Actinopterygii: Haemulidae), with Notes on Previously Known Species of Hatschekia Poche, 1902 Collected from Actinopterygians off Brazil.

Autor: Paschoal F; Laboratório de Parasitologia Animal, Centro Estudos e Pesquisas em Biologia-CEPBio, Universidade Castelo Branco, Avenida Santa Cruz, 1631, Realengo, Rio de Janeiro, RJ, 21710-255, Brazil. paschoalfabiano@gmail.com., Couto JV; Programa de Pós-Graduação em Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil., Pereira FB; Programa de Pós-Graduação em Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil., Luque JL; Departamento de Parasitologia Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, 23897-000, Brazil.
Jazyk: angličtina
Zdroj: Acta parasitologica [Acta Parasitol] 2022 Sep; Vol. 67 (3), pp. 1126-1135. Date of Electronic Publication: 2022 Apr 27.
DOI: 10.1007/s11686-022-00551-3
Abstrakt: Introduction: Copepods of the genus Hatschekia Poche, 1902 are parasitic on the gills of marine actinopterygians. Currently, about 151 species of this genus have been reported in marine ecosystems and only few occur in South Atlantic Ocean.
Methods: Fifty specimens of A. virginicus from Angra dos Reis, off the State of Rio de Janeiro, Brazil, were parasitized by copepods on the gills. Parasites were fixed and preserved in 70% ethanol. Morphological observations were based on light and scanning electron microscopy.
Results: Hatschekia nagasawai n. sp. can be distinguished from all congeners by the combination of the following characters: (1) presence of two pointed processes on the proximal (first) segment of antennule, (2) cephalothorax octagonal to ovoid, (3) absence of processes on the intercoxal sclerite of legs 1 and 2, (4) trunk without lobes at the postero-lateral margins. Other species of Hatschekia and their hosts previously collected off Brazil were analysed and discussed.
Conclusions: This is the first report of a representative of the family Hatschekiidae Kabata, 1979 parasitizing a species of Anisotremus. The number of species of Hatschekia reported in the South Atlantic Ocean was increased to five, including the new species; however, the diversity of hatschekiid copepods in this oceanographic region is still underestimated, most likely being higher than what is currently known.
(© 2022. The Author(s) under exclusive licence to Witold Stefański Institute of Parasitology, Polish Academy of Sciences.)
Databáze: MEDLINE
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