Ultrastructure of a new type of sensory ending in Echinostoma revolutum cercaria (Trematoda: Echinostomatidae).
Two pairs of hitherto unknown multiciliate sensory endings have been demonstrated in free-swimming cercariae of Echinostoma revolutum using transmission and scanning electron microscopy. This type of receptor consists of a bundle of 36--40 short, conically projecting cilia ensheathed by a collar formed by a circular evagination of tegument in shape of a cup. The cilia projecting from the centre of a widened nerve fibre, filled with electron-lucid vesicles, possess a well developed basal body and do not contain a ciliary rootlet. The function of this receptor is discussed.
Zdárská
Z
Z
Institute of Parasitology, Czechoslovak Academy of Sciences, Ceské Budĕjovice.
Nasincová
V
V
Stĕrba
J
J
Valkounová
J
J
D000818:Animals; D004449:Echinostoma / Q000648:ultrastructure*; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D011984:Sensory Receptor Cells / Q000648:ultrastructure