A term, in the
series used to
describe developmental stages of the
parasitic flagellates, denoting the "barleycorn"
form of the
flagellate in the
genus Crithidia characterised by a collarlike
extension surrounding the
anterior and
through which the
single flagellum emerges.
See: amastigote, epimastigote, promastigote, trypomastigote.
Synonym: choanoflagellate, collared flagellate.
Origin: G. Choane, a funnel, + mastix, whip