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A New Species of Caryospora (Apicomplexa: Eimeriorina) from Elaphe spp. (Serpentes: Colubridae) of the Southeastern and Central United States
Steve J. Upton, William L. Current and Susan M. Barnard
Transactions of the American Microscopical Society
Vol. 103, No. 3 (Jul., 1984), pp. 240-244
Stable URL: http://www.jstor.org/stable/3226185
Page Count: 5
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Oocysts of Caryospora duszynskii n. sp. (Apicomplexa: Eimeriorina) are described from the feces of Elaphe guttata (corn snake) and E. obsoleta obsoleta (black rat snake) from the United States, and their morphology is compared with that of similar Caryospora described from reptiles. Oocysts of C. duszynskii are spherical or subspherical, 25.7 x 24.3 μm (23.0-28.5 x 22.0-28.0), with a bilayered wall about 1.5 μm thick. Micropyle and oocyst residuum are absent. One, rarely two, polar granules are present, 1.8 x 1.6 μm (1.5-3.5 x 1.5-2.0). Sporocysts are ovoid, 18.3 x 14.8 μm (17.0-21.5 x 13.5-16.5), with prominent Stieda and substieda bodies. Sporocyst residuum present, 11.4 x 6.3 μm (9.0-13.5 x 5.5-7.5), consisting of numerous granules 1.0-2.5 μm in diameter. Sporozoites are elongate, 15.8 x 3.6 μm (13.0-19.5 x 3.0-4.5), lying lengthwise and parallel within the sporocyst. Each sporozoite contains a spherical anterior and ovoid posterior refractile body.
Transactions of the American Microscopical Society © 1984 American Microscopical Society