title: Choleoeimeria riyadhae sp.n. (Apicomplexa: Eimeriidae) from the lizard, Scincus scincus (Sauria: Scincidae) in Saudi Arabia.
abstract: Choleoeimeria riyadhae species new was described from the gall bladder of the lizard, Scincus scincus (Sauria: Scincidae) collected from east of Riyadh City, Central Region. Sporulated oocysts are broadly ellipsoid, 36.8 x 30.5 (33.4-39.1 x 28.7-32.5) microm, with a smooth, brownish-yellow bilayered wall; the shape index (L/W) is 1.21 (1.19-1.23) microm. Micropyle, polar granule and oocyst residuum are absent. Sporocysts are elongate-ellipsoid, 14.8 x 9.1 (13.7-15.5 x 8.1-10.4) microm with shape index (L/W), 1.63 (1.52-1.74) microm. Sporocyst residuum is present. The sporocysts lack a Stieda body. Sporozoites are banana-shaped blunt at one end and slightly tapered at the other. Sometimes, free sporozoites were seen within oocysts.
authors.affiliation: Department of Zoology, College of Science, King Saud University, P.O.Box 26213, Riyadh 11486, Saudi Arabia.
authors.forename: Mohamed S
authors.initials: MS
authors.lastname: Alyousif
authors.forename: Yaser R
authors.initials: YR
authors.lastname: Al-Shawa
mesh_terms: D000818:Animals; D003048:Coccidiosis / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary; D021743:Eimeriidae / Q000145:classification* / Q000302:isolation & purification*; D005704:Gallbladder / Q000469:parasitology; D008116:Lizards / Q000469:parasitology*; D012529:Saudi Arabia / Q000453:epidemiology