By matching serial sections from the flagellum to the kinetosome in selected species of chytrids (Chytridiales), the kinetosome triplets have been assigned numbers that correspond to the numbers given by general convention to the flagellum doublets. The various organelles in the zoospore are located in nine longitudinal segments that lie proximal to the kinetosome. Each segment is delineated by the cartwheel spokes of the kinetosome; segment 1 lies between subfibers A of triplets 1 and 2. InRhizophydium chlorogoniiJaczewski,R.granulosporumScherffel,Chytridium confervae(Wille) Minden, andChytriomyces hyalinusKarling, the rootlet extends from between kinetosome triplets 1 and 2, but at different angles in each species. InCatenochytridium hemicystiKnox the rootlet extends from the triplet 1, and inAllochytridium luteumBarr amp; Deacute;saulniers between triplets 9 and 1. In all species the center of the rumposome is located in segments 8, 9, or 1, and the nucleus in segments on the opposite side. The nonfunctional centriole is connected by fibers that extend from kinetosome triplets 6ndash;7 in all species and also from triplets 5 and 8 in some species.
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