Acanthocephala of fish. IV. Description of two new species of Neoechinorhynchus (Acanthocephala: Neoechinorhynchidae) and discussion of the genus

Salgado Maldonado, G.

Anales del Instituto de Biologia, Universidad Nacional Autonoma de Mexico. Serie Zoologia 49(1): 35-47


ISSN/ISBN: 0185-2590
Accession: 000813239

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Neoechinorhynchus golvani n.sp. from the intestine of Cichlasoma aureum from lake Catemaco, Veracruz, Mexico, is described and illustrated. It is closest to N. paraguayensis but differs from it by having a marked sexual dimorphism and by morphometric values. N. roseum n.sp. from the intestine of Achiurus mazatlanus from lake Caimanero, Sinaloa, Mexico, is described and illustrated. It is distinguished by the relative length of the lemnisci and by having the vaginal opening situated in a small pit 0.666 to 0.814 mm from the posterior end of the body. Studies on the comparative morphology of Neoechinorhynchus and Hebesoma indicated that the 2 genera are synonymous and N. violentum n.comb. is proposed for the only species described in Hebesoma.