Mid-Ordovician – Silurian
Clathospira is an extinct genus of facultatively mobile, epifaunal suspension feeders
Identification in Hand Sample:
- 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
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- 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.