A new coccidian (Apicomplexa: Eimeriidae), from midland brown snake, Storeria dekayi wrightorum Trapido (Ophidia: Colubridae) from Arkansas, USA

作者：McAllister Chris T; Seville R Scott; Connior Matthew B

来源：Systematic Parasitology, 2016, 93(1): 77-82.

DOI：10.1007/s11230-015-9606-8

A new species of coccidian (Protista: Apicomplexa: Eimeriidae) collected from the faeces of a midland brown snake Storeria dekayi wrightorum Trapido (Ophidia: Colubridae) in Arkansas, USA, is described. Oocysts of Isospora holbrooki n. sp. are subspherical to ovoidal with a smooth, colourless, bi-layered wall, measure on average 27.1 x 24.0 A mu m, and have a length/width (L/W) ratio of 1.1; both micropyle and oocyst residuum are absent, but a polar granule is present. Sporocysts are ovoidal, 14.8 x 10.0 A mu m on average (L/W 1.5); the Stieda body is nipple-like, the sub-Stieda body is ellipsoidal and the sporocyst residuum is composed of coarse granules in a cluster. Sporozoites have a spheroidal anterior refractile body, a subspheroidal posterior refractile body, and one centrally-located nucleus. This is the first description of an isosporan from the snake genus Storeria Baird & Girard as well as the largest oocysts and sporocysts of any previous snake isosporan to date.

• 出版日期2016-1