Some comparative fine structure relationships of the rotifer integument

摘要: Species representing three rotifer genera have been investigated with special emphasis on elucidating the detailed fine structure relationships of integumental derivatives. The classical concept cuticulization in these animals must be modified to incorporate finding that a genuine extracellular cuticle is lacking species thought very heavily cuticulized (loricate) namely, Keratella cochlearis. A consistent intracellular structural entity located just beneath hypodermal plasma membrane represent bulk reinforcing or exoskeletal material observed all rotifers thus far examined. In Philodina, this “dense layer” shown an insertion point for fiber tracts associated muscle-hypodermis desmosomes. desmosomes are interest themselves since they not septate type previously and invertebrates general, but “standard” variety more commonly seen higher animals.