CATALOG OF ORIGINAL DESCRIPTIONS: Turborotalia pseudoampliapertura nukhulensis Haggag and Luterbacher 1995

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 -> T -> Turborotalia -> Turborotalia pseudoampliapertura nukhulensis
Other pages this level: T. altispiroides, T. bannerblowi, T. bykovae, T. cambayensis, T. centralis perfecta, T. clemenciae, T. czeczvaensis, T. hirsutoides, T. kotarduensis, T. lata, T. munda franzenaui, T. pseudoampliapertura nukhulensis, T. pseudoampliapertura sinaiensis, T. pseudobesa, T. vagalkhodensis

Turborotalia pseudoampliapertura nukhulensis

Citation: Turborotalia pseudoampliapertura nukhulensis Haggag and Luterbacher 1995
Rank: sub-species
Type locality: Wadi Nukhul section near Abu Zenima, western central Sinai, Egypt.
Type age (chronostrat): Middle Eocene, uppermost part of Morozovella lehneri Zone s.l.
Type sample (& lithostrat): Sample n° 52, Khaboba Fm.
Type specimens: Pl. 2, fig. 5-9.; Desc p41
Type repository: Basel; NHM

Current identification/main database link: Turborotalia ampliapertura Bolli 1957

Original Description
Test generally moderately large, biconvex, low trochospiral, with umbilical side more convex than spiral side. Periphery fairly lobate in equatorial view ; rounded with a distinct dorso-peripheral shoulder in lateral view. The rather tightly coiled three whorls consist of approximately 14 chambers. The four chambers of the last whorl increase rapidly in size as added. Sutures depressed, radial on umbilical side, slighly curved on spiral side. Umbilicus small. Aperture a fairly wide low arch, umbihcal to slightly extraumbilical, bordered by a narrow lip. Surface finely perforate.

Size: Diameter: 130-250 µm

Etymology: The subspecies is named after its type-locality

Extra details from original publication

Remarks : Turborotalia pseudoampliapertura nukhulensis differs from its ancestor T. cerroazulensis pomeroli in having a smaller and more tightly coiled test and an umbilical to slightly extraumbilical aperture in the form of a low arch which does not extend to the periphery. The specimen selected as holotype (P1. 2, fig. 7) is very similar to one of the specimens from the Upper Eocene of Tanzania figured by Blow and Banner (1962, p. 134, fig.12c IV). In the Wadi Nukhul section, transitional forms between T. cerroazulensis pomeroli and T. pseudoampliapertura nukhulensis (see PI. 1, fig. 1-4) are observed in two closely spaced samples from the uppermost part of the Morozovella lehneri Zone s.l. (probably equivalent to the Orbulinoides beckmanni Zone, see Haggag and Luterbacher, 1991).


Haggag, M. A. & Luterbacher, H. (1995). The Turborotalia pseudoampliapertura lineage in the Eocene of the Wadi Nukhul section, Sinai, Egypt. Revue de Micropaléontologie. 38: 37-47. gs


Turborotalia pseudoampliapertura nukhulensis compiled by the pforams@mikrotax project team viewed: 30-7-2021

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
Captcha Image
Powered by Commentics