Folia Parasitologica 58[2] 121-134 (2011) | DOI: 10.14411/fp.2011.012

Two new species of Clestobothrium (Cestoda: Bothriocephalidea), parasites of Merluccius australis and M. hubbsi (Gadiformes: Merlucciidae) from the Patagonian shelf of Argentina, with comments on Clestobothrium crassiceps (Rudolphi, 1819)

Alicia A. Gilde Pertierra1, Inés S. Incorvaia2, Nathalia J. Arredondo1
1 Laboratorio de Helmintología, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Int. Güiraldes 2160, Pabellón II, 4° Piso, C1428EGA - Buenos Aires, Universidad de Buenos Aires, Argentina
2 Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Paseo Victoria Ocampo N° 1, Escollera Norte, B7602HSA, Mar del Plata, Argentina

Two new species of bothriocephalidean cestodes, Clestobothrium splendidum sp. n. from Merluccius australis (Hutton) and Clestobothrium cristinae sp. n. from Merluccius hubbsi Marini from the Patagonian shelf of Argentina, are described. Clestobothrium splendidum can be typified by the following characteristics: a medium-sized strobila composed of 410-528 proglottides that are much wider than long; 49-90 testes per mature proglottis, partially surrounding the ovary posteriorly; a transversely elongated genital pore situated anterior to spurious articulations; presence of a genital atrium; a globular cirrus-sac occupying 4-6% of mature proglottis width; a vagina with sphincter and three pairs of osmoregulatory canals on each side of the proglottis. Clestobothrium cristinae is characterised by its small size; 71-219 proglottides; 39-64 testes per mature proglottis, usually surrounding completely the ovary posteriorly; a rounded genital pore situated at the same level of spurious articulations; an oval cirrus-sac occupying 8-16% of mature proglottis width; and three pairs of osmoregulatory canals on each side of the proglottis. Clestobothrium cristinae shares with C. splendidum the type and distribution of microtriches, except for the central surface delimited by two lips. Additionally, type and voucher materials of Clestobothrium crassiceps (Rudolphi, 1819) from Merluccius merluccius were studied. A key to species is provided.

Keywords: Bothriocephalidae, Clestobothrium splendidum, Clestobothrium cristinae, Clestobothrium crassiceps, Merluccius australis, Merluccius hubbsi, key to species, Patagonian shelf, Argentina

Received: June 13, 2010; Accepted: January 15, 2011; Published: June 1, 2011  Show citation

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Gilde Pertierra, A.A., Incorvaia, I.S., & Arredondo, N.J. (2011). Two new species of Clestobothrium (Cestoda: Bothriocephalidea), parasites of Merluccius australis and M. hubbsi (Gadiformes: Merlucciidae) from the Patagonian shelf of Argentina, with comments on Clestobothrium crassiceps (Rudolphi, 1819). Folia Parasitologica, 58(2), 121-134. doi: 10.14411/fp.2011.012
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