Description of Hirsutosporos

Monomorphic, diplokaryotic; merogony - plasmodia with 14 diplokarya divide by binary or multiple fission; sporogony is in direct contact with host cell cytoplasm, and is by binary fission of a sporont with 2 diplokarya into two sporoblasts, each with one diplokaryon; spores, 7 x 4.5 µm, are broadly oval, and uninucleate; prominent exospore forms conspicuous filamentous appendages, 7-11 µm long, restricted mostly to a tuft at the posterior pole of the spore and a girdle located slightly above the equator of the spore, the rest of the exospore is ornamented with short protrusions giving to the exospore a cobblestoned appearance, as viewed by scanning electron microscopy; polaroplast is lamellar; polar tube is isofilar with 18-20 coils situated in one rank, execpt for the last 5-6 coils, which are less orderly arranged near the posterior vacuole; type species is H. austrosimulii Batson, 1983 in adipose tissue of larvae of Austrosimulium sp. (Diptera, Simuliidae).