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McAllister, C. T., Duszynski, D. W., & Roberts, D. T. (2013). A new coccidian (apicomplexa: Eimeriidae) from galapagos tortoise, chelonoidis sp. (testudines: testudinidae) from the dallas zoo. Journal of Parasitology, (preprint). 
Added by: Admin (06 Jan 2014 18:24:58 UTC)
Resource type: Journal Article
DOI: http://dx.doi.org/10.1645/13-307.1
BibTeX citation key: McAllister2013
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Categories: General
Keywords: Chelonoidis nigra, Einzeller - protozoa, Schildkröten - turtles + tortoises, Testudinidae, Veterinärmedizin - veterinary medicine
Creators: Duszynski, McAllister, Roberts
Collection: Journal of Parasitology
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Views index: 17%
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Abstract     
Testudinidae Geochelone nigra During January 1994, feces from a captive juvenile Galápagos tortoise, Chelonoidis sp. from the Dallas Zoo, Dallas County, Texas, was examined for coccidia. It was found to harbor an eimerian which is described as new. Oocysts of Eimeria iversoni n. sp. were ovoid with a smooth, single-layered wall (~0.5-0.8) and measured (L × W) 13.5 × 10.3 µm, with a length/width (L/W) ratio (= shape index ) of 1.3. Micropyle, oocyst residuum, and polar granule were absent. Two conical projections were present on 1 end of oocyst and measured 1.0-1.5 long. Sporocysts were elongate-ellipsoidal and measured 8.3 × 4.5 µm, SI was 1.8. A Stieda body (~ 0.5 high) was present, but substieda and parastieda bodies were absent. The sporocyst residuum was composed of 2-5 granules in a compact mass between sporozoites. The sporozoites were elongate and measured 9.5 × 2.5 in situ, with an ellipsoidal posterior refractile body and a spheroidal anterior refractile body. This is the second time an eimerian has been reported from Galápagos tortoises.
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