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Wrona, 1980a

Wrona, R. 1980. Microarchitecture of the chitinozoan vesicles and its paleobiological significance. Acta Palaeontologica Polonica 25 (1), 123-163. | DETAILS

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ID20090
ReferenceWrona, 1980a
AuthorWrona, R.
Year1980
TitleMicroarchitecture of the chitinozoan vesicles and its paleobiological significance
JournalActa Palaeontologica Polonica
Volume25
Number1
pgs.123-163
Source typearticle in journal
LanguageEnglish
RemarksSome Estonian specimens (provided by R. Männil) included
URLhttps://www.app.pan.pl/article/item/app25-123.html
Abstract

Morphology and inner structure of vesicles were studied by SEM in several chitinozoan species. Ten distinct. types of vesicle surface sculpture are defined. Vesicle surface sculpture is supposed to be promising for chitinozoan taxonomy. Wall ornamentation and structure are described in various chitinozoan species. These characteristics support the idea of a planktic mode of life of some chitinozoans. Mechanic and organogenic perforation is recognized in chitinozoan vesicles. Vesicle internal structures called as "opisthosome" and "mesosome" are recognized for artifacts. The structure and position of operculum indicate that this was a rigid and fixed element separating the vesicle central cavity from the external environment, aimed to be opened for once. Variation in the mode of aggregation of vesicles and in their wall structure is suggestive of a variability in wall formation among chitinozoans. Analysis of vesicle microarchitecture permits a conclusion that Chitinozoa are a heterogenous, unnatural group.