Byronids and similar tubular fossils from the Devonian of the Barrandian area (Czech Republic)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10475523" target="_blank" >RIV/00216208:11310/23:10475523 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23420/23:43968638
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=hJI7nT9W8o" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=hJI7nT9W8o</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1017/S1755691023000099" target="_blank" >10.1017/S1755691023000099</a>
Alternative languages
Result language
angličtina
Original language name
Byronids and similar tubular fossils from the Devonian of the Barrandian area (Czech Republic)
Original language description
Byronids are problematic fossils of possible cnidarian affinity, only rarely reported from the Devonian, but never previously studied in the Barrandian area, Czech Republic. Two new species Prestephanoscyphus branzovensis sp. nov. and Prestephanoscyphus robustus sp. nov. are erected from the Lochkovian and the Eifelian, respectively. Four poorly known species referred to Byronia are described in open nomenclature from the Emsian and Eifelian. The new genus Parabyronia gen. nov. with the type species Parabyronia elegans sp. nov. is closely related to other sphenothallids but is distinguished by transverse ridges on its theca and short spines at the apertural end of the theca. Definite identification of phosphatic rings as the attachment structure of byronids was proved by new material of the Lochkovian age. A dwarf conularia Pidiconularia gen. nov. with the type species Pidiconularia tubulata sp. nov. is remarkable by its minute size and very fine ornament; its conulariid affinity is proved by subrectangular cross-section and four internal carinae. Microstructure of theca of Prestephanoscyphus is characterised by alternation of compact laminae of aligned columnar microcrystallites and chambered laminae with isometric microcrystallites of apatite. Accretionary growth of byronid theca and structure of the holdfast with basal opening for the adhesive pedal disc support their cnidarian affinity although they likely display the bilateral instead of tetramerous symmetry. The protective function of bilaterally symmetrical whorls of internal apophyses in Prestephanoscyphus is suggested and their role in strengthening of thecal wall or supporting function of gastric septa are disputed. The byronids are regarded as epibionts rather than attached to the rocks. They are representatives of benthic groups with phosphatic shells that declined with decreasing availability of phosphorus in seas and oceans.
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/GA23-05217S" target="_blank" >GA23-05217S: Seagrass/seaweed meadows – overlooked Phanerozoic ecosystems: their contribution to shelf biodiversity and identification in the fossil record</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Earth and Environmental Science Transactions of the Royal Society of Edinburgh
ISSN
1755-6910
e-ISSN
1755-6929
Volume of the periodical
113
Issue of the periodical within the volume
4
Country of publishing house
GB - UNITED KINGDOM
Number of pages
18
Pages from-to
373-390
UT code for WoS article
001006081600001
EID of the result in the Scopus database
2-s2.0-85162165520