Musculature of an Ordovician (Darriwilian) patelliform gastropod from Estonia

A unique internal mould of the patelliform mollusc Eesticonus aariensis n. gen. n. sp. is described from the Middle Ordovician (Darriwilian Series, Kunda Stage) of northern Estonia. Well-preserved muscle attachment scars are compared to those of Floripatella from strata of Middle Ordovician (Dapingi...

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Bibliographic Details
Published in:GFF 2023-10, Vol.145 (3-4), p.113-122
Main Author: Peel, John S.
Format: Article
Language:English
Subjects:
archinacelloidean
Darriwilian
Estonia
Marine molluscs
Middle Ordovician
Mollusks
Muscle scars
Muscles
Ordovician
patelliform gastropod
systematics
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Description
Summary:A unique internal mould of the patelliform mollusc Eesticonus aariensis n. gen. n. sp. is described from the Middle Ordovician (Darriwilian Series, Kunda Stage) of northern Estonia. Well-preserved muscle attachment scars are compared to those of Floripatella from strata of Middle Ordovician (Dapingian Series) age in Utah, originally considered to be the oldest known patelloidean gastropod but possibly an untorted mollusc. Comparison with the muscle scar pattern in Archinacellina from the Ordovician of Bohemia suggests that Eesticonus is an archinacelloidean gastropod, but not a patellogastropod.
ISSN:1103-5897
2000-0863
DOI:10.1080/11035897.2023.2301542