Monospecific mass associations of Anaconularia anomala (Cnidaria, Scyphozoa) from the Upper Ordovician of the Czech Republic: Sedimentological and palaeobiological significance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10449786" target="_blank" >RIV/00216208:11310/22:10449786 - isvavai.cz</a>
Alternative codes found
RIV/00023272:_____/22:10135612
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GwzHnZqUeo" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GwzHnZqUeo</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.18261/let.55.2.7" target="_blank" >10.18261/let.55.2.7</a>
Alternative languages
Result language
angličtina
Original language name
Monospecific mass associations of Anaconularia anomala (Cnidaria, Scyphozoa) from the Upper Ordovician of the Czech Republic: Sedimentological and palaeobiological significance
Original language description
Five quartzose sandstone slabs hosting small groups or mass associations of Anaconularia anomala are described from the Upper Ordovician Letna Formation in the Prague Basin. The slabs contain from 4 to 59, mutually adjacent or contiguous conulariids ranging from 5 to 89 mm in length and situated on a single bedding plane. Associated with the conulariids are small mudstone intraclasts and other fossils, mostly disarticulated brachiopods and trilobites. All 101 studied conulariid specimens are oriented parallel to bedding and show strong preferential alignment, with the apical ends pointing in the same general direction. Sixteen of the conulariids terminate adapically in a probabe schott and/or exhibit a possible internal schott, while five specimens preserve one or two apertural lappets. The investigated conulariids lived in clumps and were buried catastrophically following alignment by unidirectional currents or flows acting on bodies that may have been leaning in the down-current direction and/or which had their center of mass displaced toward their apical end. Neither these nor 3000 additional specimens of A. anomala from the Sandbian Letna and Zahorany formations show any evidence of clonal budding; however, the hypothesis that clumping resulted from asexual proliferation cannot be ruled out. Finally, the periderm of A. anomala was compaction-resistant and smooth, lacking both corrugation (transverse ribs) and nodes, but whether the angular groove present at the facial midline of casts is a mould of a midline sulcus or of an internal carina remains unclear.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Lethaia
ISSN
0024-1164
e-ISSN
1502-3931
Volume of the periodical
55
Issue of the periodical within the volume
2
Country of publishing house
NO - NORWAY
Number of pages
18
Pages from-to
5
UT code for WoS article
000865727500007
EID of the result in the Scopus database
2-s2.0-85137538141