CATALOG OF ORIGINAL DESCRIPTIONS: Pulvinulina velascoensis Cushman 1925

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 -> P -> Pulvinulina -> Pulvinulina velascoensis
Other pages this level: P. arca, P. arca contusa, P. crassata, P. crassata densa, P. menardii fimbriata, P. menardii tumida, P. scitula, P. tricarinata, P. tumida flexuosa, P. velascoensis

Pulvinulina velascoensis

Citation: Pulvinulina velascoensis Cushman 1925
Rank: Species
Type locality: Tamalte Arroyo, Hacienda El Limon, State of San Luis Potosi, Mexico.
Type sample (& lithostrat): Velasco Shale
Type specimens: 4347; Plate 3, figs. 5 a-c
Type repository: Washington; USNM
Described on page(s) : 19

Linked specimens: USNM-4347

Current identification/main database link: Morozovella velascoensis (Cushman 1925)


Original Description
Test plano-convex, the dorsal side flat or even slightly concave, ventral side very much produced, periphery carinate, subacute, the series of which surround a depressed umbilical area; about seven chambers in the last-formed coil; sutures distinct, on the dorsal side curved, marked by a series of small, bead-like processes, the periphery of each with a slightly raised carina which marks also the line of coiling in the central portion, ventral side with the sutures nearly radiate, straight, much depressed, surface roughened with very minute, low spinose processes which rather uniformly cover the entire test; aperture elongate, narrow, on the ventral side of the last-formed chamber extending from near the periphery almost to the umbilical area.

Size: Diameter 0.65 mm.; thickness 0.40 mm.

Extra details from original publication
This is a very abundant species in the Velasco shale of this region, appearing in several forms, some of which may be worthy of distinction. It is distinguished by the very finely spinose surface, especially by the ring of projecting masses surrounding the umbilical area on the ventral side, and the ornamentation a solid, raised carina and beaded sutures.

References:

Cushman, J. A. (1925e). Some new foraminifera from the Velasco shale of Mexico. Contributions from the Cushman Laboratory for Foraminiferal Research. 1(1): 18-23. gs V O

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. 1-252. gs


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Pulvinulina velascoensis compiled by the pforams@mikrotax project team viewed: 14-5-2021

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