Lituitid cephalopods from the upper Darriwilian and basal Sandbian (Middle-Upper Ordovician) of Estonia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F20%3A10423812" target="_blank" >RIV/00216208:11310/20:10423812 - isvavai.cz</a>

Alternative codes found

RIV/67985831:_____/20:00541391

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=q8EfCNF4NJ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=q8EfCNF4NJ</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/11035897.2020.1762723" target="_blank" >10.1080/11035897.2020.1762723</a>

Result language

angličtina

Original language name

Lituitid cephalopods from the upper Darriwilian and basal Sandbian (Middle-Upper Ordovician) of Estonia

Original language description

Cephalopods of the order Lituitida Starobogatov, 1983 from the late Darriwilian and early Sandbian strata of Estonia are revised herein. During that time, the lituitids reached their peak abundance and were among the key components of cephalopod faunas on Baltica, as well as in other mid- and low-latitude palaeogeographic locations. The Estonian lituitids mostly come from localities representing more off-shore environments with deeper-water sedimentation in the Middle Ordovician. This supports previous assumptions that lituitids preferred pelagic environments and were capable of long-distance migration. In the studied lituitid collection, two genera were identified -LituitesBertrand, 1763 andAncistrocerasBoll, 1857. Three species -Ancistroceras ristnensissp. nov.,Ancistroceras vahikuelaensissp. nov. andLituites nehatuensissp. nov. - were newly established. However, species determinations were often hindered by high intraspecific variability and fragmentary preservation. Investigation of cameral deposits using median sections showed that: connecting rings in chambers with deposits are commonly broken or missing; oriented fragments of connecting rings are present, sometimes overgrown by primary deposits; several generations of primary deposits can be developed; simultaneous presence of both broken and intact connecting rings in the same specimen is usual. These observations elucidate the formation of cameral deposits in lituitids. Currently, this process is explained either by passive deposition from cameral fluids, or active secretion by cameral mantle. The evidence collected herein from Estonian lituitids reveals, however, that both modes of formation might have occurred successively during the lituitid ontogeny and that a gradual, life-time destruction of connecting rings was possibly involved.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10505 - Geology

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

GFF

ISSN

1103-5897

e-ISSN

—

Volume of the periodical

142

Issue of the periodical within the volume

4

Country of publishing house

SE - SWEDEN

Number of pages

30

Pages from-to

267-296

UT code for WoS article

000547129000001

EID of the result in the Scopus database

2-s2.0-85087612097