Catalog - Hastigerinella colombiana

CATALOG OF ORIGINAL DESCRIPTIONS: Hastigerinella colombiana Petters 1954

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 colombiana
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 colombiana

Citation: Hastigerinella colombiana Petters 1954
Rank: Species
Described on page(s) : 40
Type specimens: Plate 8, figures 10a, b.
Type sample (& lithostrat): U Cerreto Fm.,
Type age (chronostrat): Asterigerina crassaformis Zone, M Eocene
Type locality: International Petroleum Co. (Colombia) locality no. 22660-A, 2230m WNW of Carreto on road to San Cayetano, in 50° SE dipping limb of a small syncline.
Type repository: Washington; USNM

Linked specimens: USNM-64577

Current identification/main database link: Clavigerinella colombiana (Petters 1954)


Original Description

Test slightly trochoid; four, rarely up to six loosely arranged chambers in last-formed whorl. Chambers rapidly increasing in size, especially up to the penultimate one, short for the genus, narrow at the base which sometimes forms a short stem; rapidly widening towards periphery, much more so in apertural than in side view (ratio of greatest thickness to height is 1.7:1), resulting in a distinct flattening of chambers in direction of coiling. Walls finely perforate. Aperture a rather wide arched slit with a slight lip at the base of last-formed chamber, slightly ventral to periphery.

Size:
Greatest diameter 0.66 mm; least diameter 0.51 mm.; greatest thickness (at periphery) 0.40 mm.; least thickness (near umbilicus) 0.15 mm. 

Etymology:

Extra details from original publication
The flattening of the chambers in the direction of coiling gives the test the aspect of a paddlewheel and diferentiates this species from all others of the genus. The shape of chambers is similar to that of the recent Hastigerina murrayi Thomson.

Remarks. Complete tests are rare and can be obtained only by carefully disintegrating the shale. Loose chambers, however, are common, easy to recognize, and characteristic of the Asterigerina crassaformis zone in the Upper Carreto formation of the Departamento of Bolivar.

Editors' Notes

References:

Coxall, H. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of the Hantkeninidae (Clavigerinella, Hantkenina and Cribrohantkenina). In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 8): 213-256. gs V O

Petters, V. (1954). Tertiary and Upper Cretaceous foraminifera from Colombia, S. A. Contributions from the Cushman Foundation for Foraminiferal Research. 5(1): 37-41. gs V O


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

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