CATALOG OF ORIGINAL DESCRIPTIONS: Clavigerinella

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 -> Clavigerinella
Other pages this level: Candeina, Candeininae, Canderotalia, Candorbulina, Carinoturborotalia, Cassidulina, Cassigerinella, Cassigerinellinae, Cassigerinelloita, Catapsydracinae, Catapsydrax, Caucasella, Chiloguembelina, Chiloguembelinella, Chiloguembelinidae, Chiloguembelitria, Civisina, Clavatorella, Claviblowiella, Clavigerinella, Clavihedbergella, Claviticinella, Compactogerina, Conoglobigerina, Conoglobigerinidae, Contusotruncana, Coscinosphaera, Costellagerina, Cribrohantkenina, Cuneolina,

Daughter taxa (blue => in age window 0-300Ma)
= Clavigerinella akersi
status uncertain

Clavigerinella

Citation: Clavigerinella
Rank: Genus
Type species: Clavigerinella akersi Bolli, Loeblich and Tappan, 1957
Type level: Middle to upper Eocene.

Current identification/main database link: Clavigerinella Bolli, Loeblich and Tappan, 1957


Original Description
Test free, planispiral, biumbilicate, involute, radially lobulate in outline; chambers spherical in the early stages, later becoming radially elongate or clavate; sutures radial, depressed; wall calcareous, finely perforate, radial in structure, surface finely pitted; aperture interiomarginal, equatorial, an elongate slit extending up the apertural face, bordered laterally by wide flanges which narrow toward the upper extremity of the aperture, where they join to form a small lip.

Etymology: Claviger, L., club-bearing + ina + ella, L. diminutives; gender, feminine.

Extra details from original publication
Remarks: Clavigerinella, new genus, resembles Hastigerinella Cushman in having early globular chambers followed by later radial elongate and clavate chambers. It differs in being planispiral instead of trochospiral, and in having the distinctive equatorial aperture elongated in the plane of coiling and bordered laterally by flanges. The aperture is reminiscent of that in Hantkenina aragonensis Nuttall, but the present genus does not have tubulospines, and Hantkenina may only have radially elongate chambers which never become clavate.

Clavigerinella, new genus, differs from Hastigerinoides Bronnimann in having the distinctly elongate slitlike equatorial aperture and wide bordering flanges and in lacking, around the umbilical region, the secondary relict apertures which are the persistent lateral margins of the earlier equatorial primary apertures. As a rule, the chambers of Hastigerinoides are tapering and those of Clavigerinella are club-shaped.

References:

Bolli, H.M.; Loeblich, A.R., Jr. & Tappan, H., (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. In: Loeblich, A.R., Jr. et al. (Editors), Studies in Foraminifera, U.S. National Museum Bulletin 215. U.S. Government Printing Office, Washington, DC, pp. 3-50.


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Clavigerinella compiled by the pforams@mikrotax project team viewed: 20-6-2018

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