Artículo
Abstract:
A new species of Tylocephalum is described from the spiral intestine of the cownose ray Rhinoptera bonasus taken off Venezuela. Tylocephalum brooksi n. sp. is the third species described parasitizing this host species, along with T. pingue and T. bonasum. T. brooksi is similar to congeners in the possession of a scolex with a fungiform pars apicalis, craspedote segmentation, circummedullary vitellarium, external seminal vesicle, bilobed ovary, and medioventral uterus. However, this species differs from all previously described species of Tylocephalum in having a collar around the base of the pars apicalis densely covered by large digitiform processes (microtriches?), and an internal seminal vesicle. The internal seminal vesicle is a feature currently used to differentiate Tetragonocephalum from Tylocephalum. Its presence in T. brooksi indicates that it should be considered a specific instead of a generic character. An emended diagnosis of Tylocephalum is proposed excluding this feature, along with distribution of the testes in the preovarian field and circummedullary distribution of vitelline follicles. Species of Tylocephalum and Tetragonocephalum are reviewed on the basis of original descriptions, and 2 distinct morphological groups of species defined. Species of the Tetragonocephalum group possess a combination of an acraspedote strobila, segments much longer than wide, testes limited to the region anterior to the cirrus sac, vitellarium of lateral bands, conspicuously enlarged genital atrium and pore, cirrus sac dorsal to genital atrium, and bisaccate uterus. Species of the Tylocephalum group differ from Tetragonocephalum in possession of a craspedote strobila, segments more quadrangular, testes distributed throughout the preovarian field, inconspicuous genital atrium, uniformly saccate uterus, cirrus sac lateral to genital atrium, and probable circummedullary vitellaria in all species.
Registro:
| Documento: | Artículo |
| Título: | Emendation of the generic diagnosis of Tylocephalum (Cestoda: Lecanicephalidea: Tetragonocephalidae), and description of Tylocephalum brooksi n. sp. |
| Autor: | Ivanov, V.A.; Campbell, R.A. |
| Filiación: | Departamento de Cs. Biologicas, Facultad de Cs. Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina |
| Palabras clave: | animal; article; cestode; cestodiasis; nonhuman; parasite identification; scolex; taxonomy; tetragonocephalum; tylocephalum bonasum; tylocephalum brooksi; tylocephalum pingue; Animal; Cestoda; Cestode Infections; Fish Diseases; Skates (Fish); Support, Non-U.S. Gov't |
| Año: | 2000 |
| Volumen: | 86 |
| Número: | 5 |
| Página de inicio: | 1085 |
| Página de fin: | 1092 |
| Título revista: | Journal of Parasitology |
| Título revista abreviado: | J. Parasitol. |
| ISSN: | 00223395 |
| CODEN: | JOPAA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223395_v86_n5_p1085_Ivanov |
Referencias:
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- Campbell, R.A., Williams, A.D., Tylocephalum Linton, 1890 (Cestoda: Lecanicephalidea) from the Cownose ray, Rhinoptera bonasus (Mitchill, 1815) with a discussion of its validity and systematic relationships (1984) Proceedings of the Helminthological Society of Washington, 51, pp. 121-134
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- Perrenoud, W., Recherches anatomiques et histologiques sur quelques cestodes de selaciens (1931) Revue Suisse de Zoologie, 38, pp. 469-552
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- Shipley, A.E., Hornell, J., Further report on parasites (1905), pp. 49-57. , Report to the Government of Ceylon on the pearl oyster fisheries of the Gulf of Manaar, Part III, W. A. Herdman (ed.). Royal Society of London, U.K; Shipley, A.E., Hornell, J., Cestode and nematode parasites from the marine fishes of Ceylon (1906), pp. 43-102. , Report to the Government of Ceylon on the pearl oyster fisheries of the Gulf of Manaar, Part V, W. A. Herdman (ed.). Royal Society of London, U.K; Southwell, T., A monograph on the Tetraphyllidea (1925) Memoirs of the Liverpool School of Tropical Medicine, 2, pp. 1-368
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Citas:
---------- APA ----------
Ivanov, V.A. & Campbell, R.A. (2000) . Emendation of the generic diagnosis of Tylocephalum (Cestoda: Lecanicephalidea: Tetragonocephalidae), and description of Tylocephalum brooksi n. sp. Journal of Parasitology, 86(5), 1085-1092.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223395_v86_n5_p1085_Ivanov [ ]
---------- CHICAGO ----------
Ivanov, V.A., Campbell, R.A. "Emendation of the generic diagnosis of Tylocephalum (Cestoda: Lecanicephalidea: Tetragonocephalidae), and description of Tylocephalum brooksi n. sp." Journal of Parasitology 86, no. 5 (2000) : 1085-1092.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223395_v86_n5_p1085_Ivanov [ ]
---------- MLA ----------
Ivanov, V.A., Campbell, R.A. "Emendation of the generic diagnosis of Tylocephalum (Cestoda: Lecanicephalidea: Tetragonocephalidae), and description of Tylocephalum brooksi n. sp." Journal of Parasitology, vol. 86, no. 5, 2000, pp. 1085-1092.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223395_v86_n5_p1085_Ivanov [ ]
---------- VANCOUVER ----------
Ivanov, V.A., Campbell, R.A. Emendation of the generic diagnosis of Tylocephalum (Cestoda: Lecanicephalidea: Tetragonocephalidae), and description of Tylocephalum brooksi n. sp. J. Parasitol. 2000;86(5):1085-1092.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223395_v86_n5_p1085_Ivanov [ ]
