| Karyolysus | |
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| Genus: | Karyolysus
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Karyolysus lacazei | |
Karyolysus is a genus of coccidia.[1]
It includes the species Karyolysus lacerate.[2]
The genus was created by Labbe in 1894 for those species of sporozoans that fragmented the host nucleus. Reichenow in 1921 established that this property was of dubious taxonomic value. He propose a different set of criteria for inclusion in this genus and these are the one currently in use.
The family Karyolysidae was created by Wenyon in 1926.
Schizongeny occurs in the endothelial cells
Gametogony occurs in the erythrocytes after thier penetration by the merozoites.
Differentiation from the genus Haemogregarina may be difficult as in both genera gametocytogenis occurs in the erythrocytes and are have similar morphology. They can be distinguished on the location of schizogony: In Karyolysus this occurs in the endothelial cells of the visera while in Haemogregarina schizogony occurs in the bone marrow.
Hypnozoites are found in Karyolysus lacerate.
K. sonomae - yellow legged frog (Rana boyli boyli)