Specimens of a species of cyclocoelid digenean inhabiting Jacana spinosa from the Area de Conservación Guanacaste, Costa Rica, most closely resemble Haematotrephus facioi (Brenes and Arroyo, 1962) Yamaguti, 1971, in the same host from Aranjuez, Puntarenas Province, Costa Rica, in having confluent vitelline follicles posteriorly, diagnostic of Neohaematotrophus, and in pharynx length, ovary width, and cirrus sac on the sinistral side. The new species is also highly similar in appearance to H. gendrei Dubois, 1959, also inhabiting a jacanid (from West Africa), which has vitelline follicles confluent posteriorly, and extending anteriorly to the intestinal bifurcation and genital pore opening immediately posterior to the anterior margin of the pharynx. Like H. facioi, H. gendrei has a relatively much shorter and broader cirrus sac than does the new species. Examination of the holotype and paratype of H. facioi confirmed that the specimens from Guanacaste differ in having a longer body, a larger ovary and eggs, and smaller testes. They also have the ovary on the sinistral rather than the dextral side of the body, genital pore anterior to the pharynx rather than at or posterior to the level of the posterior margin of the pharynx, longer and thinner cirrus sac, and eggs without eyespotted miracidia. Half the eggs in both specimens of H. facioi have well-developed eyespotted miracidia, whereas the typical condition for cyclocoelids is for virtually all eggs to exhibit eyespotted miracidia. Both H. facioi and H. gendrei are transferred to Neohaematotrophus, along with the new species.
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August 2003
SYSTEMATICS-PHYLOGENETICS|
August 01 2003
NEOHAEMATOTREPHUS ARAYAE N. SP. (DIGENEA: ECHINOSTOMIFORMES: CYCLOCOELIDAE) IN JACANA SPINOSA (AVES: CHARADRIIFORMES: JACANIDAE) FROM THE AREA DE CONSERVACIÓN GUANACASTE, COSTA RICA
David Zamparo;
David Zamparo
Department of Zoology, University of Toronto, Toronto, Ontario M5S 3G5, Canada. [email protected]
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Daniel R. Brooks;
Daniel R. Brooks
Department of Zoology, University of Toronto, Toronto, Ontario M5S 3G5, Canada. [email protected]
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Douglas Causey;
Douglas Causey
Department of Zoology, University of Toronto, Toronto, Ontario M5S 3G5, Canada. [email protected]
* Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts
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Beatriz Rodriguez
Beatriz Rodriguez
Department of Zoology, University of Toronto, Toronto, Ontario M5S 3G5, Canada. [email protected]
† Escuela de Microbiologia, Universidad de Costa Rica, San Pedro, Costa Rica
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J Parasitol (2003) 89 (4): 829–831.
Citation
David Zamparo, Daniel R. Brooks, Douglas Causey, Beatriz Rodriguez; NEOHAEMATOTREPHUS ARAYAE N. SP. (DIGENEA: ECHINOSTOMIFORMES: CYCLOCOELIDAE) IN JACANA SPINOSA (AVES: CHARADRIIFORMES: JACANIDAE) FROM THE AREA DE CONSERVACIÓN GUANACASTE, COSTA RICA. J Parasitol 1 August 2003; 89 (4): 829–831. doi: https://doi.org/10.1645/GE-3103
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