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The Morphology and Morphogenesis of the Buccal Organelles in Paramecium with Particular Reference to their Systematic Significance *
Author(s) -
Yusa Ayere
Publication year - 1957
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1957.tb02498.x
Subject(s) - paramecium , biology , organelle , buccal administration , morphogenesis , morphology (biology) , evolutionary biology , zoology , microbiology and biotechnology , genetics , bioinformatics , gene
SUMMARY. A comparative cytological study of the buccal organelles in seven species of Paramecium and a critical analysis of their morphogenesis during binary fission are presented. The. results show several heretofore overlooked features of the buccal system which may possess considerable systematic significance. On the basis of the morphology of the buccal apparatus and its mode of stomatogenesis, the genus Paramecium , traditionally placed among the trichostomes, is considered to be a true member of the order Hymenostomatida. The taxonomic utility of the buccal organelles and their phylogenetic implications are discussed in the light of the fundamental principles underlying the “new systematics” of ciliated protozoa.