Fusispira sulcata (fossil snails) (Kope Formation, Upper Ordovician; Cincinnati region, USA) 5

            Fusispira sulcata Ulrich, 1897 - fossil snails from the Ordovician of the Cincinnati region, USA.

These fossils are from the famous Cincinnatian Series of the tristate area of Ohio-Kentucky-Indiana.  Rocks in the Cincinnatian were deposited in relatively shallow marine facies during the Late Ordovician.  The Cincinnatian succession is mostly interbedded fossiliferous limestones and shales.  Most of the limestones are event beds (= tempestites), deposited during ancient storms.

The fossils seen here are gastropods, a group of molluscs that occupy marine, freshwater, and terrestrial environments.  Most have a calcareous external shell (the snails).  Some lack a shell completely, or have reduced internal shells (the slugs & sea slugs & pteropods).  Most members of the Gastropoda are marine.  Most marine snails are herbivores (algae grazers) or predators/carnivores.

The shells of these fossil snails have not been preserved.  The original hard parts of many fossil shelly organisms (e.g., bivalves, gastropods, brachiopods, cephalopods) have dissolved away.  In such cases of dissolution, the fossil itself is an impression of the outside of the shell (external mold) or an impression of the inside of the shell (internal mold).  These examples are internal molds.

Classification: Animalia, Mollusca, Gastropoda, Fusispiridae (or Subulitidae)

Stratigraphy: Kope Formation, Edenian Stage, lower Cincinnatian Series, Upper Ordovician

Locality: undisclosed site in the Cincinnati region of southwestern Ohio or southeastern Indiana or northern Kentucky, USA

Some rights reserved

Taken on: May 4, 2024

Tags:

Fusispira

sulcata

fossil

snails

snail

gastropod

gastropods

Kope

Formation

Ordovician

Cincinnatian

Series

Edenian

Stage

Group

Eden

internal

mold

molds

dissolution

Gastropoda

Fusispiridae

Subulitidae « less

Sets appears in: • Kope Formation (Upper Ordovician; Ohio-Indiana-Kentucky, USA) • Ordovician Rocks & Fossils more » • Cincinnatian Fossils and Rocks (Upper Ordovician of the Cincinnati, Ohio region, USA) • Fossil Preservation Styles - Dissolution (Internal Molds & External Molds) • Gastropod Fossils « less

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