Published January 29, 2026
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Table 2 in The genus Discoceras (Tarphyceratida, Cephalopoda; Ordovician) from Estonia and glacial erratics in north-central Europe
Authors/Creators
- 1. Institute of Geology, Czech Academy of Sciences, Rozvojová 269, Prague, 16500, Czech Republic. & University of Tartu, Faculty of Science and Technology, Institute of Ecology and Earth Sciences, Department of Geology, Ravila 14 a, 50411 Tartu, Estonia.
- 2. Museum für Naturkunde, Leibniz-Institut für Evolutions-und Biodiversitätsforschung, Invalidenstrasse 43, 10115 Berlin, Germany.
- 3. Finnish Museum of Natural History, University of Helsinki, P. O. Box 44, Fi- 00014, Finland.
Description
Table 2. Parameters and ratios used for the description of the specimens of the genus Discoceras Barrande, 1867 studied herein.
| Parameter [unit] | Abbrev. | Calculation |
|---|---|---|
| conch diameter [mm] | dm | – |
| whorl height [mm] | wh | – |
| whorl width [mm] | ww | – |
| umbilical width [mm] | uw | dm1-wh1-wh2 |
| apertural height [mm] | ah | dm1-dm2 |
| imprint zone [mm] | iz | wh1-ah |
| whorl expansion rate (outline) | WERdm | (dm /dm)2 1 2 |
| whorl expansion rate (apertural height) | WERah | [dm /(dm -ah)]2 1 1 |
| imprint zone rate | IZR | iz/wh |
| umbilical width index | UWI | uw/dm |
| conch width index | CWI | ww/dm |
| whorl width index | WWI | ww/wh |
Notes
Published as part of Aubrechtová, Martina, Korn, Dieter & Kröger, Björn, 2026, The genus Discoceras (Tarphyceratida, Cephalopoda; Ordovician) from Estonia and glacial erratics in north-central Europe, pp. 6 in European Journal of Taxonomy 1036 on page 6, DOI: 10.5852/ejt.2026.1036.3173, http://zenodo.org/record/18479586
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Identifiers
Related works
- Is part of
- Journal article: 10.5852/ejt.2026.1036.3173 (DOI)
- Journal article: urn:lsid:plazi.org:pub:FFD47426FFD6FF9BFFD6470C7D5EFFF6 (LSID)
- Journal article: http://publication.plazi.org/id/FFD47426FFD6FF9BFFD6470C7D5EFFF6 (URL)
- Journal article: http://zenodo.org/record/18479586 (URL)
- Journal article: http://zoobank.org/0784B061-33CD-498B-B6D6-5CA4CF5BC2E4 (URL)
References
- Barrande J. 1867. Systeme silurien du Centre de la Boheme; Iere partie: Recherches paleontologiques, Vol. II. Texte. Classe des Mollusques, Ordre des Cephalopodes. Praha, Paris. Available from https://www.biodiversitylibrary.org/page/14886746 [accessed 5 Nov. 2025].