Catalog - Hastigerinella simplex

CATALOG OF ORIGINAL DESCRIPTIONS: Hastigerinella simplex Morrow 1934

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 -> Hastigerinella -> Hastigerinella simplex
Other pages this level: H. alexanderi, H. bermudezi, H. bizonae, H. caucasica, H. colombiana, H. eocanica, H. eocanica aragonensis, H. frailensis, H. jarvisi, H. moremani, H. rhumbleri, H. riedeli, H. simplex, H. simplicissima, H. subcretacea, H. watersi

Hastigerinella simplex

Citation: Hastigerinella simplex Morrow 1934
Rank: Species
Type specimens: Plate 30, figures 6a; 75376
Type age (chronostrat): Cenomanian
Type locality: Sec. 31, T. 21 S., R. 22 W., Hodgeman County, KS
Type repository: Washington; USNM

Linked specimens: USNM-75376

Current identification/main database link: Clavihedbergella simplex (Morrow, 1934)


Original Description

Test moderately trochoid; chambers in the early portion globular, the penultimate chamber becoming slightly elongate and the final chamber strongly elongate and evenly rounded at the end; chambers about 4 in the final whorl; sutures distinct, moderately depressed; wall finely spinose; aperture indistinct.

Size:
Diameter 0-50 mm., thickness about 0.2 mm.

Etymology:

Extra details from original publication
It is with some hesitation that this species is excluded from Globigerina for if the final chamber were lacking it would certainly be placed in this genus. However as H. simplex falls so nicely into the evolutionary series of the genus I am considering it as distinct from Globigerina. This species seems to be even more primitive than H. moremoni Cushman (34, p.86, pl. 11, figs. 1-3) which shows the elongation of the chambers at an earlier stage and an expansion of the later chambers toward the tip. It seems probable that this species represents very nearly the lowest limit of the genus. The Tertiary species H. eocanica Nuttall (27, p. 376, pl. 50, figs. 9-11) has bluntly rounded chambers but, as other species of the genus, differs in the earlier development of the elongated chambers. Hastigerinella simplex has been found only in the Greenhorn formation.
This species has been found in samples from several Hartland shale localities, but is not known to occur in other members.


Editors' Notes

References:

Cushman, J. A. (1946). A rich foraminiferal fauna from the Cocoa sand of Alabama. Cushman Laboratory for Foraminiferal Research, Special Publication. 16: 40-. gs

Morrow, A. L. (1934). Foraminifera and ostracoda from the Upper Cretaceous of Kansas. Journal of Paleontology. 8: 186-205. gs


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Hastigerinella simplex compiled by the pforams@mikrotax project team viewed: 4-10-2022

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