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Catalog entries: Pterochitininae
Original description: Diagnosis: Glabrous Desmochitinidae (smooth, finely granulated or finely reticulated surface); chamber spheroidal-lenticular to cylindro-ovoid; collar may be present or absent; membranous carina, simple or reticulated, always present, located either at the equatorial, peri-basal, or sub-basal position; mucron may be present or absent; inter-chamber connections fairly resistant.
Distinguishing features:
Parent taxon (Desmochitinidae): no neck
This taxon: carina
Geological Range:
Last occurrence (top): at top of Middle Devonian Period (100% up, 382.7Ma, in Givetian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Ordovician Period (443.07-486.85Ma, base in Tremadocian 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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Pterochitininae compiled by the Sonia Camino, viewed: 11-8-2026
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