Clathrospira

Classification
Phylum: Mollusca
Class: Gastropoda
Order: Murchisoniina
Family: Eotomariidae
Genus: Clathrospira Ulrich and Scofield, 1897
Cincinnatian Species: Clathrospira conica,
Clathrospira subconica

[accordions title=”” disabled=”false” active=”1″ autoheight=”false” collapsible=”true”] [accordion title=”Taxonomic Details”]Formerly: Previousley Pleurotomaria(Hall 1847), now known as Clathrospira(Ulrich and Scofield, 1897)

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Geologic Range
Mid-Ordovician – Silurian

Common Paleoecology
Clathospira is an extinct genus of facultatively mobile, epifaunal suspension feeders

Identification in Hand Sample:

Turbiniform
Moderatly spired
Prosocline growth lines
Sutures shallow
Growth lines lean toward the growth direction when above the selenizone and lean away from the direction of growth below it

Geographic Occurrences

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Rohr (1996):

The conical spire and the presence of a shallow slit and selenizone at the periphery are characteristic of Clathrospira,… the weak spiral threads are considered diagnostic by Ulrich and Scofield (1897) and Knight (in Knight et al., 1960) …

Fossils of Ohio (1996):

Shell moderately spired

Treatise on Invertebrate Paleontology, Part I, Vol. 1 (1960) :

Turbiniform with conical spire and shallow sutures, narrowly phaneromphalus; growth lines strongly prosocline above selenizone and strongly opisthocline below it, but rounding to gently proscline on base, outlining a moderately deep labral sinus that culminates in a short slit; selenizone bordered by fine threads; growth lines and lunulae periodically strengthened, very fine spiral threads numerous.

Ulrich & Scofield (1897):

Shell in all respects like Eotomaria except that the band is nearly vertical and situated upon the periphery of the whorls, and the surface beautifully cancellated.

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C. conica

C. subconica