Rudimicrosporea

Ru·di·mi·cro·spo·rea (roo″dĭ-mi″kro-sporґe-ə) [rudiment + micro- + spore] a class of protozoa (phylum Microspora) found as hyperparasites of gregarines in annelids, the spores of which have a simple extrusion apparatus consisting of a polar cap and a thick polar tube extending backward from the cap, bending laterally and terminating in an infundibulum; a polaroplast and posterior vacuole are absent. It comprises one order: Metchnikovellida.