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Catalog entries: Tanuchitininae
Original description: Diagnosis: Conochitinidae with a smooth vesicle surface (which may be polished, felt-like, or smooth); chamber cylindro-conical to club-shaped; aboral margin rounded or pointed; presence of a membranous peri-basal or sub-basal carina, entire or fringed, not coinciding with the maximum diameter of the chamber. Mucron sometimes present; inter-chamber connections very fragile.
Distinguishing features:
Parent taxon (Conochitinidae): flexure inconspicuous
This taxon: carina
Geological Range:
Last occurrence (top): at top of Early Devonian Period (100% up, 393.3Ma, in Eifelian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Silurian Period (419.00-443.07Ma, base in Rhuddanian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
NB The ranges given for genera and higher taxa are the total ranges of species included in that taxon in this database - so the true total range of the taxon will usually be longer
Paris, F. (1981a). Les Chitinozoaires dans le Paléozoïque du Sud-Ouest de l'Europe: Cadre géologique, étude systématique, biostratigraphie. Memoires de la Societe Geologique et Mineralogique de Bretagne. 26: 1-412. gsReferences:

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Tanuchitininae compiled by the Sonia Camino, viewed: 19-8-2026
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