Published March 3, 2025 | Version v1

Kiaeroceras undefined-C

Authors/Creators

  • 1. Finnish Museum of Natural History, Fi- 00014 University of Helsinki, PO Box 44, Finland

Description

Kiaeroceras sp. C

Fig. 35E, G

Material examined

ESTONIA • 1 spec.; Niibi hillock; Moe Formation, Pirgu Regional Stage; GIT 225-997.

Description

The specimen is a nearly complete mold of a mature body chamber with height, width, and length of 53 mm, 44 mm and 75 mm, respectively (CHI = 1.11). The conch is straight and tubular. The conch cross section is oval compressed with a relatively narrow, drop-shaped margin on the prosiphuncular side. The peristome is nearly straight and a very shallow (5 mm) hyponomic sinus occurs on the prosiphuncular side. The siphuncle is nearly marginal with a septal foramen ca 8 mm in diameter, located ca 3 mm from the conch margin (RSH = 0.15, RSP = 0.16).

Comparison

This specimen differs from K. ormsoense sp. nov., to which it is otherwise similar, in having a compressed conch cross section and a longer, perfectly tubular body chamber (RBL = 1.4 as compared with RBL ca 1 in K. (?) ormsoense).

Notes

Published as part of Kröger, Björn, 2025, The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia, pp. 1-169 in European Journal of Taxonomy 978 on pages 111-112, DOI: 10.5852/ejt.2025.978.2801, http://zenodo.org/record/14988376

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Linked records

Additional details

Biodiversity

Collection code
GIT
Material sample ID
GIT 225-997
Kingdom
Animalia
Phylum
Mollusca
Family
Cyrtogomphoceratidae
Genus
Kiaeroceras
Species
undefined-C
Taxon rank
species