Systematic Parasitology

, Volume 96, Issue 9, pp 789–793 | Cite as

Isospora toxostomai n. sp. (Apicomplexa: Eimeriidae) from the curved-billed thrasher Toxostoma curvirostre (Swainson) (Passeriformes: Mimidae) at the Central highlands of Mexico

  • Celene Salgado-Miranda
  • Juan Pablo Medina
  • Jessica Mariana Sánchez-Jasso
  • Marco García-Albarrán
  • Edgardo Soriano-VargasEmail author


Isospora toxostomai n. sp. (Apicomplexa: Eimeriidae) is described based on material from the curved-billed thrasher Toxostoma curvirostre (Swainson) in the Central Highlands of Mexico. The new species possesses subspherical oöcysts, with a smooth, bi-layered wall. Sporulated oöcysts measure 22-25 × 21-24 (23.4 × 22.3) µm; length/width (L/W) ratio of 1.0-1.1 (1.1). Sporocysts are ellipsoidal, 15-17 × 10-11 (15.8 × 10.5); L/W ratio of 1.3-1.6 (1.5). Micropyle and oöcyst residuum are both absent, and a polar granule present (many fibrils). Mean dimensions of both sporulated oöcysts and sporocysts of I. toxostomai n. sp. appear to be considerably larger than those of Isospora mimusi Coelho, Berto, Neves, Oliveira Flausino & Lopes, 2011 from the tropical mockingbird Mimus gilvus (Vieilot) in Brazil. This is the second species of Isospora Schneider, 1881 infecting a host of the Mimidae in the Americas.



This study was funded by Institute for Biodiversity Research, Development & Sustainability (iBIRDS, Mexico).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable institutional, national and international guidelines for the care and use of animals were followed.


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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Centro de Investigación y Estudios Avanzados en Salud Animal, Facultad de Medicina Veterinaria y ZootecniaUniversidad Autónoma del Estado de MéxicoTolucaMexico
  2. 2.Institute for Biodiversity Research, Development & Sustainability (iBIRDS)TolucaMexico

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