Catalog - Sphaeroidinella disjuncta Catalog - Sphaeroidinella disjuncta

CATALOG OF ORIGINAL DESCRIPTIONS: Sphaeroidinella disjuncta Finlay 1940

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 -> S -> Sphaeroidinella -> Sphaeroidinella disjuncta
Other pages this level: S. cellata, S. dehiscens excavata, S. dehiscens reticulata, S. dehiscens subdehiscens, S. disjuncta, S. ionica, S. ionica evoluta, S. ionica ionica, S. missionis, S. multiloba, S. rutschi, S. senni, S. spinulosa, S. transiens

Sphaeroidinella disjuncta

Citation: Sphaeroidinella disjuncta Finlay 1940
Taxonomic rank: species
Type sample (& lithostrat): Type from 4270, Upper Ihungia. Continues from here throughout Taranakian (e.g. 3114, Upper Poha).
Type locality: 4270-Waikohu S.D., Tangihanga, New Zealand
Type repository: Lower Hutt

Linked specimens: USNM-689168

Current identification/main database link: Sphaeroidinellopsis disjuncta (Finlay, 1940)


Original Description

Rather small, 3 to 4 chambers in ventral view, the fourth usuaJly small, outline roughly triangular. Resembles Globigerina triloba, but much more coarsely pitted, early chambers especially having numerous pustules; sutures deep, heavily channelled near umbilicus; aperture small, rounded, forming with umbilicus a deep cavity. A frequent tendency for last chamber to be smaller than others and somewhat jutting.

Size:
Size, 0.58 mm.

Extra details from original publication
In many respects half-way between Globigerina and Sphaeroidinella, lacking the polish, pore appearance and compactness of dekiscens, but less like Globigerina in chamber attachment and deeply cleft sutures. In a sample from the Miocene Upper Mena series of New Guinea a very closely species occurred together with the true S. dehiscens, both abundant, but only the latter was found in samples from the overlying Lower and Upper Ouba series (mostly Pliocene). True dehiscens occurs in New Zealand at least as low as Urenuian (5185, 5018).

References:

Finlay, H. J. (1940). New Zealand foraminifera: Key species in stratigraphy - no. 4. Transactions of the Royal Society of New Zealand. 69(4): 448-472. gs


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Sphaeroidinella disjuncta compiled by the pforams@mikrotax project team viewed: 13-4-2026

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