Háskóli Íslands

A new Eimeria species (Protozoa: Eimeriidae) from caribou in Ameralik, West Greenland

TitleA new Eimeria species (Protozoa: Eimeriidae) from caribou in Ameralik, West Greenland
Publication TypeJournal Article
Year of Publication2016
AuthorsSkirnisson, K, Cuyler, C
JournalParasitology Research
Fecal samples of 11 calves shot in the Ameralik
area, West Greenland, in August–September 2014 were examined
for coccidian parasites. The calves belonged to a population
of interbreeding indigenous caribou Rangifer tarandus
groenlandicus and feral semi-domestic Norwegian reindeer
Rangifer tarandus tarandus. Two coccidian species were
found: Eimeria rangiferis and a coccidium that was identified
and described as a new species. The latter’s sporulated oocyst
is spherical or slightly subspherical. Average size is
25.6× 24.8 μm. The oocyst has two distinct walls.Wall thickness
is ∼1.4 μm. The unicolored outer wall is brown, the inner
wall is dark gray. The oocysts contain a small polar granule
but are devoid of a microphyle. The oocysts enclose four
ovoid-shaped sporocysts with a rounded end opposite to the
Stieda body. The average size of sporocysts is 15.2×7.8 μm.
Sporocysts contain a granular sporocyst residuum that forms a
spherical cluster between the sporocysts, one large refractile
body is present in each sporozoite. The spherical form easily
distinguishes oocysts of the new species from the seven previously
described eimerid species in R. tarandus. This is the
first eimerid described as a new species to the sciences from
caribou in the Nearctic.
Þú ert að nota: brimir.rhi.hi.is