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HELMINTOS PARASITOS DAS ESPÉCIES SCOMBEROMORUS CAVALLA (CUVIER) E SCOMBEROMORUS MACULATUS (MITCHILL) DO LITORAL CEARENSE: CONTRACAECUM FORTALEZAE SP. N. (NEMATODA, ASCARIDOIDEA)
Scomberomorus cavalla (Cuvier)
Scomberomorus maculatus (Mitchill)
Contracaecum fortalezae sp. n. (Nematoda, Ascaridoidea)
Litoral cearense
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Abstract in Portuguese
De nematódeos encontrados parasitando estômago, intestinos delgado e grosso de Scomberomorus cavalla (Cuv.) e Scomberomorus maculatus (Mitch.) o autor propões para o gênero Contracaecum Railliet et Henry, 1912 uma nova espécie, C. fortalezae sp. n., que mais se aproxima de C. clavatum (Rud., 1809) Baylis, 1920 dela se diferenciando por possuir espículos desiguais, um curto ovejetor, útero opistodelfo, ovos menores e por apresentar em todos exemplares estudados ceco intestinal curto e ceco esofagiano longo.
Abstract
In this paper the author proposes a new species of the genus Contracaecum Railliet et Henry, 1912. Of the species under Contracaecum, Contracaecum clavatum (Rudolphi, 1809) Baylis, 1920 is the nearest to Contracaecum fortalezae sp. n. differing from the latter by the following aspects: The males have unequal spicules. The females have a short ovijector and parallel uteri directed backward and the eggs are smaller. In both sexes the intestinal cecum is always short and the ventricular posterior appendix is always long, while Contracaecum clavatum presents these structures in an inverse way, considering the lenght of them. Besides, the thorn-like formations at the posterior end of the body are different.
Keywords in Portuguese
Helmintos parasitosScomberomorus cavalla (Cuvier)
Scomberomorus maculatus (Mitchill)
Contracaecum fortalezae sp. n. (Nematoda, Ascaridoidea)
Litoral cearense
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