CATALOG OF ORIGINAL DESCRIPTIONS: Heterohelix pseudoreussi Bergstresser and Frerichs 1982

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 pseudoreussi
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

Heterohelix pseudoreussi

Citation: Heterohelix pseudoreussi Bergstresser and Frerichs 1982
Rank: Species

Current identification/main database link: Planoheterohelix globulosa (Ehrenberg, 1840)

Original Description
Test small to medium, biserial with five to seven pairs of chambers. Wall calcareous, perforate, with fine discontinuous costae. Chambers subglobular, slightly wider than higher, with a slight tendency to become reniform, increasing fairly rapidly in size. Sutures depressed, medial suture forming a zigzag. Aperture a high arch at base of final chamber.

Extra details from original publication
Heterohelix pulchra (Brotzenj. MELLO.1971. p. 35. pl. 5, fig. 10 .
Remarks. This species differs from Heterohelix pulchra in possessing less reniform chambers and possessing obvious costae. It is most similar to Heterohelix reussi (Cushman) but possesses slightly more inflated and rounded chambers and better developed costae.
Occurrence. This species was found in the present study from 419 to approximately 631 meters above the base of the Pierre Shale at Red Bird, Wyoming. Mello (1971) reported this species as H. pulchra (Brotzen) from 499 meters above the base of the Pierre Shale. This species is also present in the lower transition member of the Pierre Shale at Canon City, Colorado, from 230 to 390 meters above the base of the Pierre Shale at Burris Draw and McAllaster Buttes, western Kansas, and from 53 to approximately 600 meters above the base of the Pierre Shale at Boulder, Colorado.


Bergstresser, T. J. & Frerichs, W. E. (1982). Planktonic foraminifera from the Upper Cretaceous Pierre Shale at Red Bird, Wyoming. Journal of Foraminiferal Research. 12(4): 353-361. gs


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

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