ScienceAsia 15 (1989): 293-299 |doi: 10.2306/scienceasia1513-1874.1989.15.293

ECHINOPARYPHIUM OSCITANSI N.SP. (TREMATODA: ECHINOSTOMATIDAE): NATURAL INFECTION IN ASIAN OPEN-BILLED STORKS (ANASIDMUS OSCITANS; AVES: CICONIIDAE) IN THAILAND

PILAI POONSWAD AND PRADON CHATIKAVANIJ

ABSTRACT: In examining 71 Asian open-billed storks (Anastomus oscitans), Echinoparyphium oscitansi n.sp. was recovered from the intestinal lumen of 3 storks with concurrent infection by Chaunocephalus ferox, found in cysts forming in the intestinal wall. The adult E. oscitansi n.sp. had only 25 collar spines. The morphology and structure of the adult fluke are given. Four spines were grouped on each corner, 4 arranged singly on each side and the remainder arranged in two alternate rows, orally and aborally. All spines were equal in size. Vitellaria were small follicles that extended from the posterior to the level of the ovary. The uterus was short and contained a few comparatively large eggs. It does not resemble any of the described species of genus Echinoparyphium except E. jubilarum, which possesses 27 collar spines and is larger than E. oscitansi n.sp.

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a) Department of Mathematics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
b) Department of Mathematics and Computer Sciences, Faculty of Applied Science, King Mongkut's Institute of Technology, North Bangkok, Bangkok 10300, Thailand

Recevied 3 August 1989