Catalog - Praetenuitella impariapertura Catalog - Praetenuitella impariapertura

CATALOG OF ORIGINAL DESCRIPTIONS: Praetenuitella impariapertura Li 1987

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> P -> Praetenuitella -> Praetenuitella impariapertura
Other pages this level: P. antica, P. impariapertura, P. patefacta, P. praegemma

Praetenuitella impariapertura

Citation: Praetenuitella impariapertura Li 1987
taxonomic rank: Species
Type specimens: P51995
Type sample (& lithostrat): Just below the Red Bluff clays, sample GS/479.
Type age (chronostrat): Late Eocene (Pl5-Pl6, ?Pl7).
Type locality: Eastern Shubuta, Clarke County, Mississippi
Type repository: London, UK; NHM

Linked specimens: London, UK; NHM (PM P 51995)

Current identification:


Original Description

Test concave on spiral side; chambers globular, 5-6 in final whorl; early chambers finely macroperforate, later chambers microperforate; aperture high, peripheral in early stage, becoming extraumbilical-peripheral in an adult.

Etymology:
imparis, unequal; unequally distributed aperture.

Extra details from original publication
Remarks - The aperture of this new taxon is commonly developed in two distinct parts. A highly arched or subtriangular opening is situated at the periphery; this is connected to a narrow slit, which extends into the umbilicus. The early ontogenetic stage is planispirally coiled with a high aperture, suggesting that this species may be derived from a small, planispiral, finely macroperforate variant of, possibly, Pseudohastigerina micra s.l.

References:

Li, Q. (1987). Origin, phylogenetic development and systematic taxonomy of the Tenuitella plexus (Globigerinitidae, Globigerininina). Journal of Foraminiferal Research. 17: 298-320. gs


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Praetenuitella impariapertura compiled by the pforams@mikrotax project team viewed: 27-5-2024

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