A new coccidian parasite (Apicomplexa: Eimeriidae: Eimeria) from the southern black racer, Coluber constrictor priapus (Reptilia: Ophidia: Colubridae) from Arkansas, USA
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Chris T. McAllister
,
John A. Hnida
Abstract
Between April 2012 and October 2017, 18 southern black racers, Coluber constrictor priapus, were collected from nine counties of Arkansas (n = 13) and McCurtain County, Oklahoma (n = 5) and their faeces examined for coccidian parasites. One of 18 (6%) C. c. priapus harboured an eimerian that we describe here as new. Oocysts of Eimeria dunni sp. nov. were subspheroidal with a lightly pitted bi-layered wall measuring L × W 24.0 × 21.1 and L/W ratio of 1.2. A micropyle was absent but an oocyst residuum and polar granule were present. Sporocysts were ovoidal and measured 11.9 × 8.1 with L/W of 1.5. A Stieda body was present but substieda and parastieda bodies were absent. The sporocyst residuum was composed of medium-sized granules aligned along perimeter of sporocyst or in a dispersed mass. This represents the first valid eimerian reported from the southern black racer.
Acknowledgments
We thank Drs. S.L. Gardner and Gabor Racz (HWML) and S.E. Trauth (ASUMZ) for expert curatorial assistance. M.B. Connior and S.E. Trauth provided some of the negative snakes examined in this study. Scientific collecting permits were provided to CTM by the Arkansas Game and Fish Commission and Oklahoma Department of Wildlife Conservation.
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© 2018 W. Stefański Institute of Parasitology, PAS
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