Catalog - Heterohelix sphenoides

CATALOG OF ORIGINAL DESCRIPTIONS: Heterohelix sphenoides 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 -> H -> Heterohelix -> Heterohelix sphenoides

Other pages this level: H. (Chiloguembelina) pseudotessera directa, H. (Heterohelix) planeobtusa, H. dentata, H. fayose, H. ivandeklaszi, H. labellosa, H. navarroensis, H. nkporoensis, H. olssoni, H. orientalis, H. pachymarginata, H. pseudoglobulosa, H. pseudoreussi, H. robusta, H. rumseyensis, H. sphenoides, H. stenopos, H. striata aegyptiaca, H. suwalkensis, H. varsoviensis, H. virgata, H. vistulaensis

Masters 1977_2f5-6-166.jpg
holotype-166.jpg

Heterohelix sphenoides

Citation: Heterohelix sphenoides Masters 1976

Rank: Species

Type locality: At creek level along the west bank of Valley Creek beneath Jefferson Davis Ave. bridge, Selma, SW 1/4, SE 1/4, sec. 26, T. 17 N., R. 10 E., Selma Quadrangle, Dallas County, AL

Type age (chronostrat): Santonian

Type specimens: 184672

Type repository: Washington; USNM

Linked specimens: USNM-184671 USNM-184672 USNM-184671 USNM-184672 USNM-184670

Current identification/main database link: Planoheterohelix sphenoides (Masters, 1976)

Original Description
Early part of test broadly flaring with globular chambers, later with more lentil shaped chambers and subparallel sides; finely to coarsely costate surface texture. Aperture a high, narrow arch bordered by a narrow, imperforate lip. Chamber sutures imperforate, depressed, convex toward later chambers; zig-zag median suture twice the width fo the other sutures.

References:

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

Masters, B. A. (1977a). Mesozoic planktonic foraminifera. In, Ramsay, A. T. S. (ed.) Oceanic Micropaleontology. Academic Press, London 1: 301-731. gs

Heterohelix sphenoides compiled by the pforams@mikrotax project team viewed: 16-4-2021

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Short stable page link: https://mikrotax.org/pforams/index.php?id=131798 Go to Archive.is to create a permanent copy of this page - citation notes

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