Anphira guianensis sp. nov. (Isopoda, Cymothoidae) from the gills of Acnodon oligacanthus Eigenmann (Pisces, Serrasalmidae) of French Guiana

Thatcher, Vernon E.

doi:10.1590/S0101-81752002000600005

Abstract

Anphira guianensis sp. nov. (Isopoda, Cymothoidae) is described from the branchial cavity of a freshwater fish, Acnodon oligacanthus Eigenmann, 1903 from French Guiana. The new species differs from the other known species of the genus in a number of important respects. Adult females are less convex than those of the other two known species and the mouth points downward. The coxal plates are largest posteriorly, unlike those of the other species. The antennule is much stouter and longer than the antenna whereas in the other species these appendages are subequal. Additionally, the dactyls of the new species are much longer.

Cymothoidae; Isopod parasite; fish parasite; Brazil

Anphira guianensis sp. nov. (Isopoda, Cymothoidae) from the gills of Acnodon oligacanthus Eigenmann (Pisces, Serrasalmidae) of French Guiana¹ 1 ) Contribution number 1403 of the Departamento de Zoologia, Universidade Federal do Paraná.

Vernon E. Thatcher

Departamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-980 Curitiba, Paraná, Brasil. Research Fellow of the CNPq

ABSTRACT

Anphira guianensis sp. nov. (Isopoda, Cymothoidae) is described from the branchial cavity of a freshwater fish, Acnodon oligacanthus Eigenmann, 1903 from French Guiana. The new species differs from the other known species of the genus in a number of important respects. Adult females are less convex than those of the other two known species and the mouth points downward. The coxal plates are largest posteriorly, unlike those of the other species. The antennule is much stouter and longer than the antenna whereas in the other species these appendages are subequal. Additionally, the dactyls of the new species are much longer.

Key words: Cymothoidae. Isopod parasite, fish parasite, Brazil

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ACKNOWLEDGMENT. The author thanks Dr. Michel Jégu of the Laboratoire d'Ichtyologie générate et appliquée, Muséum national d'Histoire naturelle, Paris, France, for collecting the specimens and making them available for study.

Received in 01.VIII.2002; accepted in 05.XI.2002

Trilles, J.P. 1991. Catalogue mondial des Cymothoidae. Studia Marina, Kotor, 21/22(1-2):5-288.
Thatcher, V.E. 1991. Amazon fish parasites. Amazoniana, Plöen, 11(3/4):263-571.
______. 1993. Anphira branchialis gen. et sp. nov. (Crustacea, Isopoda, Cymothoidae) a gill cavity parasite of piranhas (Serrasalmus spp.) in the Brazilian Amazon. Acta Amazonica, Manatis, 23(2-3):297-307.
______. 1995. Anphira xinguensis sp. nov. (Isopoda, Cymothoidae) a gill chamber parasite of an Amazonian serrasalmid fish, Ossubtus xinguense Jégu, 1992. Amazoniana, Plöen, 13(3/4):293-303.
______. 2000. The isopod parasites of South American fishes, p. 193-226. In: G. Salgado-Maldonado; A.N.G. Aldrete & V.M. Vidal-Martinez (Eds). Metazoan parasites in the Neotropics: A systematic and ecological perspective. Mexico, Instituto de Biologia, Univ. Nacional Autónoma de México, 310p.

1

) Contribution number 1403 of the Departamento de Zoologia, Universidade Federal do Paraná.

Publication Dates

Publication in this collection
03 June 2009
Date of issue
Dec 2002

History

Accepted
05 Nov 2002
Received
01 Aug 2002

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] Trilles, J.P. 1991. Catalogue mondial des Cymothoidae. Studia Marina, Kotor, 21/22(1-2):5-288.

[2] Thatcher, V.E. 1991. Amazon fish parasites. Amazoniana, Plöen, 11(3/4):263-571.

[3] ______. 1993. Anphira branchialis gen. et sp. nov. (Crustacea, Isopoda, Cymothoidae) a gill cavity parasite of piranhas (Serrasalmus spp.) in the Brazilian Amazon. Acta Amazonica, Manatis, 23(2-3):297-307.

[4] ______. 1995. Anphira xinguensis sp. nov. (Isopoda, Cymothoidae) a gill chamber parasite of an Amazonian serrasalmid fish, Ossubtus xinguense Jégu, 1992. Amazoniana, Plöen, 13(3/4):293-303.

[5] ______. 2000. The isopod parasites of South American fishes, p. 193-226. In: G. Salgado-Maldonado; A.N.G. Aldrete & V.M. Vidal-Martinez (Eds). Metazoan parasites in the Neotropics: A systematic and ecological perspective. Mexico, Instituto de Biologia, Univ. Nacional Autónoma de México, 310p.