An orthothecid hyolith with a digestive tract from the early Cambrian of Bornholm, Denmark

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F18%3A10133916" target="_blank" >RIV/00023272:_____/18:10133916 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1080/11035897.2018.1432680" target="_blank" >http://dx.doi.org/10.1080/11035897.2018.1432680</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/11035897.2018.1432680" target="_blank" >10.1080/11035897.2018.1432680</a>

Result language

angličtina

Original language name

An orthothecid hyolith with a digestive tract from the early Cambrian of Bornholm, Denmark

Original language description

The hyolith assemblage from the early Cambrian of Bornholm, Denmark, shows a higher diversity than contemporary assemblages in Baltoscandia. The most common species in the Green Shales (Læså Formation, Norretorp Member, Cambrian Stage 3), is Hyolithes [=Hyolithus] (Orthotheca) johnstrupi Holm, 1893. A specimen of this species shows a well-preserved and almost complete digestive tract, folded into an approximately 22 mm long chevron-like structure comprised of at least 20 arcuate loops on the ventral side and a flattened, gently sinuous to straight anal tube on the dorsal side. The thin, phosphatic outer shell layer of the conch is crushed under the digestive tract due to compaction while the digestive tract is preserved in three dimensions and appears undisturbed. The shape of the digestive tract is similar to that of the middle Cambrian Guduguwan hardmani (Etheridge) from Australia and the lower Cambrian specimens from Russia described by Meškova &amp; Sysoev. The Danish specimen is probably an adult, lending support to the idea that the orthothecid digestive tract becomes more complex during ontogeny. Hyolithus (Orthotheca) johnstrupi is revised and here referred to Circotheca Sysoev, 1958.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10506 - Paleontology

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

GFF

ISSN

1103-5897

e-ISSN

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Volume of the periodical

140

Issue of the periodical within the volume

1

Country of publishing house

SE - SWEDEN

Number of pages

13

Pages from-to

25-37

UT code for WoS article

000432160200003

EID of the result in the Scopus database

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