Title

Singhiatrema vietnamensis sp n. (Digenea : Ommatobrephidae) and Szidatia taiwanensis (Fischthal and Kuntz, 1975) comb. n. (Digenea : Cyathocotylidae) from Colubrid Snakes in Vietnam

Document Type

Article

Publication Date

7-1-2001

Department

Coastal Sciences, Gulf Coast Research Laboratory

Abstract

A new digenean is described and a second species is redescribed from the colubrid rear-fanged water snakes Enhydris chinensis (Gray) and Enhydris plumbea (Boie) captured from several regions in Vietnam during 1996-1998. Singhiatrema vietnamensis sp. n. (Ommatobrephidae) from the small intestine of both snakes is characterized by the extent of the ceca, the position of the vitellaria, the size of the eggs, and the host. Szidatia taiwanensis (Fischthal and Kuntz, 1975) comb. n. (Cyathocotylidae) is redescribed from the holotype and specimens from the gallbladder of both snakes. The species is transferred from the genus Mesostephanoides primarily because it does not have a large cirrus that is spined; it is characterized by the shape of the seminal vesicle, length of the ceca, body size relative to the forebody, number of testes in hindbody, egg size, size of tribocytic organ, and the infection site in the host. Concerning the classification of Singhiatrema Simha within Echino-stomatiformes, we consider Singhiatrematinae Simha a junior synonym of Ommatobrephinae Poche. We discuss the classification of Gogatea Lutz and Szidatia Dubois and consider Gogatinae Mehra a junior synonym of Szidatiinae Dubois. The use of different fixation methods can produce artifacts characteristic at the generic level.

Publication Title

COMPARATIVE PARASITOLOGY

Volume

68

Issue

2

First Page

219

Last Page

227

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