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Ciliary ultrastructure of neomeniomorphs (Mollusca, Neomeniomorpha = Solenogastres)
Author(s) -
Lundin Kennet,
Schander Christoffer
Publication year - 2001
Publication title -
invertebrate biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.486
H-Index - 42
eISSN - 1744-7410
pISSN - 1077-8306
DOI - 10.1111/j.1744-7410.2001.tb00041.x
Subject(s) - biology , cilium , polyplacophora , ultrastructure , anatomy , basal body , bilateria , axoneme , mollusca , zoology , microbiology and biotechnology , paleontology , phylogenetics , flagellum , genetics , bacteria , gene
. The ultrastructure of the ciliary apparatus of multiciliated epidermal cells of the trochophore of Epimenia babai and the adult of Strophomenia scandens was studied. The trochal cirri of E. babai consists of long cilia with unspecialized tips. The surfaces between the trochs are sparsely covered with shorter cilia of similar structure except for length. In the adult of S. scandens , the foot is covered by a dense mat of cilia with blunt electron‐dense tips. In both E. babai and S. scandens , all cilia have two perpendicularly orientated rootlets. This condition is similar to that of the Chaetodermomorpha (=Caudofoveata) and Polyplacophora. In other molluscs studied to date, the cilia of multiciliated epidermal cells have a single rootlet or a derivative thereof. The presence of two ciliary rootlets likely represents the basal plesiomorphic state for the Bilateria. The existence of this character in the Neomeniomorpha, Chaetodermomorpha, and Polyplacophora is congruent with the hypothesis of a basal position of these taxa within the Mollusca.