Catalog - Schackoina sellaeforma Catalog - Schackoina sellaeforma

CATALOG OF ORIGINAL DESCRIPTIONS: Schackoina sellaeforma Masters 1976

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 -> Schackoina -> Schackoina sellaeforma
Other pages this level: S. armata, S. cabri, S. cenomana alberti, S. cenomana bicornis, S. cenomana masellae, S. cenomana pentagonalis, S. cenomana trinacriae, S. cenomana utriculus, S. cushmani, S. francogallicorum, S. gandolfii, S. jeanneti, S. leckiei, S. moliniensis, S. pentagonalis, S. pentagonalis aperta, S. primitiva, S. pustulans pustulans, S. pustulans quinquecamerata, S. reicheli, S. sellaeforma, S. tappanae, S. trifolia

Schackoina sellaeforma

Citation: Schackoina sellaeforma Masters 1976
Taxonomic rank: species

Linked specimens: USNM-184796 USNM-184795 USNM-184797 USNM-184797 USNM-184796 USNM-184794

Current identification/main database link: Schackoina cenomana (Schacko, 1897)


Original Description

Diagnosis: Schackoina sellaeforma is distinguished by possessing chambers which are laterally compressed with the longest dimension in the direction of coil and two tubulospines per chamber which are located aborally and adorally

Description Test small, planispiral, biumbilicate, laterally compressed. Chambers elongate in direction of coil, slightly inflated. Juvenile chambers have one centrally positioned tubulo-spine; later chambers have two tubulospines located in the plane of coil, one aboral and one adoral. Wall with numerous minute pores. Occasional small pustules on thin wall surface. Primary aperture with a flanged lip extending across the margin into the umbilici. Relict apertures present along the umbilici. Sutures indistinct, depressed, radial.

Extra details from original publication
Differentiation.-Schackoina sellaeforma differs from S. multispinata (Cushman & Wickenden) by having all tubulospines in the plane of the coil. 

Derivation of name.-From the Latin sella = saddle and forma = shape.

Occurrence.-Mooreville Chalk at Hatcher's Bluff, on south bank of Alabama River, 43 feet above river level at mile 201.55, Dallas County.

Range.-Lower Campanian.


Editors' Notes
published as sellaeforma but usually corrected to sellaeformis (the adjective means saddle-shape)

References:

Masters, B. A. (1976). Planktonic foraminifera from the Upper Cretaceous Selma group, Alabama. Journal of Paleontology. 50(2): 318-330. gs


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Schackoina sellaeforma compiled by the pforams@mikrotax project team viewed: 18-6-2026

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Comments (2)

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original name Schackoina sellaeforma (not sellaeformis)

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corrected now, thanks