CATALOG OF ORIGINAL DESCRIPTIONS: Steineckia Georgescu 2009

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 -> Steineckia
Other pages this level: Schackoina, Schackoinella, Shastrina, Siderolina, Sigalia, Sigalitruncana, Sphaerogerinidae, Sphaeroidina, Sphaeroidinella, Sphaeroidinellopsis, Spiroplecta, Steineckia, Streptochilus, Subbotina,

Daughter taxa (blue => in age window 0-300Ma)
status uncertain

Steineckia

Citation: Steineckia Georgescu 2009
Rank: Genus
Type species: Steineckia steinecki Georgescu 2009

Current identification/main database link:


Original Description

Diagnosis. Test is nannoperforate to microperforate, with large pore mounds and without periapertural pustulose area.

Description. Test is biserial throughout. Earlier chambers are globular, the last-formed ones reniform. Periphery is broadly rounded, without peripheral structures. Aperture is an arch at the base of the last-formed chamber and is bor- dered by two well-developed symmetrical anges. Chamber surface ornamented is with large pore mounds. Test wall is calcitic, hyaline, nannoperforate to microperforate.

Etymology: Genus named in honor of Dr. P. Lewis Steineck (Purchase, State University of New York) for his contributions in the development of the evolutionary classification of the Cenozoic planktic foraminifera.

Extra details from original publication
Remarks. Steineckia differs from Laeviheterohelix – emended by the absence of a periapertural pustulose area; it also lacks the incipient multiserial stage developed in the evolved species of Laeviheterohelix (i.e., L. reniformis). The origins of Steineckia are unknown. The absence of vestigial costae suggests that its ancestor is a taxon with smooth test surface.

Stratigraphic range. Upper Turonian (lower part of the Whiteinella baltica Biozone).

Geographic distribution. South Atlantic (Falkland Plateau).

References:

Georgescu, M.D., (2009). Taxonomic revision and evolutionary classification of the biserial Cretaceous planktic foraminiferal genus Laeviheterohelix Nederbragt, 1991. Revista Mexicana de Ciencias Geológicas, 26: 315-334.


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Steineckia compiled by the pforams@mikrotax project team viewed: 25-11-2017

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