CATALOG OF ORIGINAL DESCRIPTIONS: Cassidulina winniana Howe 1939

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 -> C -> Cassidulina -> Cassidulina winniana
Other pages this level: C. chipolensis, C. globulosa, C. winniana,

Cassidulina winniana

Citation: Cassidulina winniana Howe 1939
Rank: Species
Type locality: About three feet below top of cut on the east side of State Highways, just north of Dodson, 0.1 mile north of south line of sec.22, T. 13 N., R. 3 W., Winn Parish, La., U.S.A.
Type age: Eocene,
Type sample and level: Claiborne. Cook Mountain formation; calcareous, glauconitic, fossiliferous clay.
Holotype Repository: Baton Rouge; Deposited in the author's collection at Louisiana State University, University, Louisiana, U. S. A.; slide no. 2040.

Current identification/main database link:

Original Description
Test minute, consisting of subglobular chambers, nine chambers being visible from either side; periphery strongly lobulated; chambers very distinct, inflated, in alternating pairs at each side at the periphery; sutures deeply depressed, distinct; wall smooth; aperture an arched slit in the line of coiling.

Size: Breadth of holotype: 0.11 mm.; thickness, 0.08 mm.

Extra details from original publication
This minute species resembles the Miocene species C. chipolensis, but has several more chambers to the coil.

Editors' Notes
Huber et al. (2006) showed that the holotype of winniana is a benthic form referable to Cassidulina. Pearson et al. (2018) list many records of C. winniana in  their synonymy of C. eocaenica. 


Howe, H. V. (1939). Louisiana Cook Mountain Eocene foraminifera. Bulletin of the Geological Survey of Louisiana. 14: 1-122. gs :: ::

Huber, B. T., Olsson, R. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene microperforate planktonic foraminifera (Jenkinsina, Cassigerinelloita, Chiloguembelina, Streptochilus, Zeauvigerina, Tenuitella, and Cassigerinella) and Problematica (Dipsidripella). 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 16): 461-508. gs :: ::

Pearson, P. N., Spezzaferri, S., Huber, B. T. & Kučera, M. (2018b). Taxonomy, biostratigraphy, and phylogeny of Oligocene Cassigerinella. In, Wade, B. S. , Olsson, R. K. , Pearson, P. N. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 18): 481-494. gs :: ::


Cassidulina winniana compiled by the pforams@mikrotax project team viewed: 1-6-2020

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