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Cryptobia Sp. In the Snail Triadopsis Multilineata (Say): Fine Structure of Attached Flagellates and Their Mode of Attachment to the Spermatheca*: FINE STRUCTURE of ATTACHED Cryptobia

Author:
CURRENT, WILLIAM L
Source:
The journal of eukaryotic microbiology 1980 v.27 no.3 pp. 278-287
ISSN:
1066-5234
Subject:
Cryptobia, cytoplasm, electron microscopy, flagellum, microvilli, snails, spermatheca
Abstract:
SYNOPSIS. A Cryptobia sp. that appears to differ structurally from Cryptobia helicis Leidy occurred as 2 distinct populations within the spermatheca of the land snail Triadopsis multilineata (Say). Attached flagellates were a resident population within the spermatheca while pleomorphic, free‐swimming forms were a transient population moving freely within the reproductive tract. Slender, free‐swimming flagellates were apparently the ones transmitted by a venereal route. It was observed by electron microscopy that attachment was achieved through an extensive morphologic transformation of the first 5 to 10 μm of the anterior flagellum which resulted in the formation of numerous pseudopodium‐like structures (“flagellapodia”) capable of invading the microvillus border of the host tissue. Flagellapodia were delimited by a single unit membrane, contained granular cytoplasm, and were long, branched, finger‐like structures which interdigitated extensively with host cell microvilli. Fine structure of the Cryptobia sp. is distinctly different from that reported for C. helicis. the differences include structure and position of the preoral ridge, the cytostome‐cytopharynx, the recurrent flagellum, and the presence of the flagellapodia.
Agid:
80856