Collar spine models in the genus <Emphasis Type="Italic">Echinostoma</Emphasis> (Trematoda: Echinostomatidae) |
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| Authors: | Ivan Kanev Bernard Fried and Valentin Radev |
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| Institution: | (1) Present address: H. W. Manter Laboratory of Parasitology, University of Nebraska, W-529 Nebraska Hall, Lincoln, NE 68588, USA;(2) Department of Biology, Lafayette College, Easton, PA 18042, USA;(3) Institute of Experimental Pathology and Parasitology, Bulgarian Academy of Sciences, Bl. 25, Sofia, 1113, Bulgaria |
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| Abstract: | This paper discusses collar spine arrangements in the genus Echinostoma. All arrangements are of uneven numbers of collar spines on the oral collar. The total number of collar spines in these arrangements
ranges from a low 31 to a high 51. There are 11 models of collar spine arrangements in the Echinostoma consisting of spine numbers 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, and 51. Representative species with these collar spine
arrangements are given in the article. The number of collar spines in a species is identical in both the larval and adult
forms. Reports of even numbered spine counts in the genus Echinostoma are erroneous and probably reflect counts on worms with lost, retracted, or supernumerary spines. |
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