Studies on the Opalinidae of Australian frogs : the life cycle of Zelleriella binucleata (Raff) in the frog Limnodynastes tasmaniensis Gunther
Date
1963
Authors
Tait, Noel Norman
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Abstract
The Opalinidae are a group of protozoa inhabiting
the rectum of Anura. The systematics of the group has
been the subject of much controversy. Metcalf's view
(Metcalf, 1918), that the Opalinidae represent a primitive
stage in the evolution of the Ciliata, has been discredited
by more recent workers. A series of papers, culminating
with that of Grasse (1952), has pointed out the affinities
of the Opalinidae with the Flagellates. Grasse (op. cit.)
created a new super-order Opalinina at the same level as
the Protomonadina and Metamonadina, clearly indicating his
view of their specialized evolution from existing flagellates.
Corliss (1955) summarized the ciliate and the flagellate
characters of the Opalinidae and agreed with Grasse as
regards their specialized flagellate affinities. For
these reasons the Order Protociliata of Metcalf (op. cit.)
has been discarded.
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Opalinidae, Protozoa
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Thesis (Masters)
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