crithidia pragensis crithidia pragensis crithidia pragensis is a species of monoxenous trypanosomatid. it is known to parasitise brachycera flies, and was first found in the czech republic. crithidia pragensis scientific classification (unranked): excavata phylum: euglenozoa class: kinetoplastea order: trypanosomatida genus: crithidia species: c. pragensis binomial name crithidia pragensisyurchenko et al., 2014