ULTRASTRUCTURE OF A NEW TYPE OF SENSORY ENDING IN ECHINOSTOMA-REVOLUTUM CERCARIA (TREMATODA, ECHINOSTOMATIDAE)

  • 1 January 1987
    • journal article
    • research article
    • Vol. 34  (4) , 311-+
Abstract
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.