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Acta Parasitologica

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Volume 63, Issue 3


A new coccidian parasite (Apicomplexa: Eimeriidae: Eimeria) from the southern black racer, Coluber constrictor priapus (Reptilia: Ophidia: Colubridae) from Arkansas, USA

Chris T. McAllister / John A. Hnida
  • Department of Microbiology and Immunology, Midwestern University, 19555 N 59th Avenue, Glendale, Arizona, 85308, USA
  • Other articles by this author:
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/ Henry W. Robison
Published Online: 2018-07-04 | DOI: https://doi.org/10.1515/ap-2018-0064


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.

Keywords: Apicomplexa; Coccidia; oocysts; Ophidia; survey; Colubridae; Coluber constrictor priapus; Arkansas


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About the article

Received: 2018-02-19

Revised: 2018-04-12

Accepted: 2018-04-16

Published Online: 2018-07-04

Published in Print: 2018-09-25

Citation Information: Acta Parasitologica, Volume 63, Issue 3, Pages 558–562, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2018-0064.

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