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Helminth parasites of the endangered hooded grebe, Podiceps gallardoi, from Patagonia Argentina, with the description of two new digenean species

Published online by Cambridge University Press:  04 October 2017

V. Núñez ,
F. Drago ,
S. Jones  and
L. Lunaschi
V. Núñez
Affiliation:
División Zoología Invertebrados, Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata (UNLP), Paseo del Bosque S/N°, 1900 La Plata, Buenos Aires Province, Argentina Comisión de Investigaciones Científicas de la provincia de Buenos Aires (CIC), Calle 526 e/10 y 11, La Plata, Buenos Aires, Argentina
F. Drago*
Affiliation:
División Zoología Invertebrados, Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata (UNLP), Paseo del Bosque S/N°, 1900 La Plata, Buenos Aires Province, Argentina Comisión de Investigaciones Científicas de la provincia de Buenos Aires (CIC), Calle 526 e/10 y 11, La Plata, Buenos Aires, Argentina
S. Jones
Affiliation:
División Zoología Invertebrados, Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata (UNLP), Paseo del Bosque S/N°, 1900 La Plata, Buenos Aires Province, Argentina
L. Lunaschi
Affiliation:
División Zoología Invertebrados, Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata (UNLP), Paseo del Bosque S/N°, 1900 La Plata, Buenos Aires Province, Argentina Comisión de Investigaciones Científicas de la provincia de Buenos Aires (CIC), Calle 526 e/10 y 11, La Plata, Buenos Aires, Argentina
*
Author for correspondence: F. Drago, E-mail: fdrago@fcnym.unlp.edu.ar
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Abstract

In March 2011, a predator killed 33 hooded grebes, Podiceps gallardoi Rumboll (Podicipedidae), a critically endangered species, in a nesting colony at El Cervecero Lake, Santa Cruz Province, Argentina. The viscera of ten birds were examined for helminths. Two new species of Trematoda were recovered from the intestines. The plagiorchid Plagiorchis patagonensis n. sp. is mainly characterized by the larger size of the oral sucker relative to the ventral sucker, and by the distribution of the vitellarium in two lateral fields, confluent between the caecal bifurcation and the ventral sucker. The echinostomatid Euparyphium tobianum n. sp. is mainly characterized by possessing a head collar with 37–39 spines (4 angle spines on each ventral lappet, 4 lateral spines in a single row on each side, and 21–23 dorsal spines in a double row). An unidentified cestode, a tetramerid nematode and a notocotylid trematode were also recovered from the birds. This is the first record of helminths parasitizing the hooded grebe.

Type
Research Paper
Information
Journal of Helminthology , Volume 92 , Issue 5 , September 2018 , pp. 563 - 571
Copyright
Copyright © Cambridge University Press 2017 

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