An <i>Isospora</i> Species (Apicomplexa: Eimeriidae) Identified From a Black-Faced Cuckoo-Shrike (<i>Coracina novaehollandiae</i>) (Gmelin, 1789) (Passeriformes: Campephagidae) in Western Australia.

ABSTRACT: We describe and characterize a new Isospora species from the black-faced cuckoo-shrike (Coracina novaehollandiae) in Western Australia, using both morphological and molecular approaches. Microscopic analysis of a fecal sample revealed 20 ellipsoidal oocysts, which are subspheroidal to ovoid, measuring 40-43 × 39-41 μm (mean 41.4 × 39.6 μm) with a length/width (L/W) ratio of 1.0-1.1 (mean 1.04). The oocyst wall is bi-layered (~1.5 μm thick), with a smooth outer layer constituting approximately two thirds of the total thickness. A micropyle is present, characterized by a slight invagination of the inner layer (~6.0 μm wide), but no micropyle cap is observed. Both the oocyst residuum and polar granule are absent. Sporocysts (n = 20) are ellipsoidal, measuring 23-24 × 13-1

SUBMITTER: Chen Y 

PROVIDER: S-EPMC12037227 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature