Putative Ordovician green alga Krejciella reinterpreted as enteropneust hemichordate tube (Czech Republic)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10456256" target="_blank" >RIV/00216208:11310/22:10456256 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=E1Iz7yyEtJ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=E1Iz7yyEtJ</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.26879/1185" target="_blank" >10.26879/1185</a>
Alternative languages
Result language
angličtina
Original language name
Putative Ordovician green alga Krejciella reinterpreted as enteropneust hemichordate tube (Czech Republic)
Original language description
Fossil and extant representatives of Enteropneusta play an important role in the interpretation of early evolution of animals, such as echinoderms, hemichordates and chordates. However, remains of fossil Enteropneusta are rare. Re-examination of available specimens of organic tubes of the Ordovician putative green alga Krejciella putzken Obrhel 1968 does not show any morphological difference from the Cambrian Margaretia dorus Walcott, 1931. The latter species has been recently interpreted as an organic tube produced and inhabited by the worm-like enteropneust hemichordate Oesia disjuncta Walcott, 1911. However, the absence of the subterranean lateral extension in Ordovician specimens excludes the synonymy of Krejciella and Margaretia. Geographic distribution of Cambrian organic tubes classified as Margaretia Walcott, 1931 indicates a possible latitudinal control, as all occurrences are apparently restricted to tropical and subtropical belts when plotted in Cambrian palaeogeographic maps. In comparison, the occurrence of the herein studied specimens of Krejciella is restricted to cold-water localities of West Gondwana. The micropalaeontological analysis of a rock sample bearing one specimen of Krejciella shows the presence of moderately preserved chitinozoans, including the zonal species Linochitina pissotensis. This taxon is, for the first time, documented from the Prague Basin and determines the Middle/Late Ordovician boundary interval of the analysed sample. The herein studied specimens of Krejciella extend the record of organic tubes produced by enteropneust hemichordates both stratigraphically and palaeogeographically to the Middle/Late Ordovician cold-water area.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GA18-14575S" target="_blank" >GA18-14575S: Fossil assemblages of Libeň and Letná formations (Upper Ordovician) - keys to the understanding of Fezouata and Tafilalt biotas of Morocco</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Palaeontologia Electronica
ISSN
1935-3952
e-ISSN
1094-8074
Volume of the periodical
25
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
19
Pages from-to
a25
UT code for WoS article
000863086100001
EID of the result in the Scopus database
2-s2.0-85136188858