Ophryocystis

Ophryocystis
SEM image showing an Ophryocystis elektroscirrha spore on a monarch butterfly scale
Scientific classification
Domain: Eukaryota
Clade: Sar
Clade: Alveolata
Phylum: Apicomplexa
Class: Conoidasida
Order: Neogregarinorida
Family: Ophryocystidae
Genus: Ophryocystis
Schneider, 1883

Ophryocystis is a genus of neogregarine protozoan parasites that infect insects in the orders Coleoptera and Lepidoptera. Ophryocystis species with beetle hosts replicate in the Malpighian tubules, while those infecting butterflies do so in the hypodermis.