Nannotax3 - ntax_Farinacci - Calcidiscaceae Nannotax3 - ntax_Farinacci - Calcidiscaceae

CATALOG - Calcidiscaceae


Folder trail: ntax_Farinacci -> C -> Calcidiscaceae
Folders this level: Calciarcus, Calcicalathina, Calcidiscaceae, Calcidiscus, Calcioconus, Calciopappus, Calciopilleus, Calciosolenia, Calciosoleniaceae, Calcitrema, Calcivascularis, Calculites, Calicasphaera, Calolithus, Calyculaceae, Calyculus, Calyptrolithina, Calyptrolithophora> >>

Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
Taxa are sorted alphabetically for simple browsing, or you can use search boxes at the top & bottom of the page




Current identification/main database link: Calcidiscaceae Young & Bown, 1997

Compiled data

Citation: Calcidiscaceae Young & Bown, 1997
taxonomic rank: Family
Described on page(s) : 41
Current citation: Calcidiscaceae Young & Bown, 1997


Original Description

Diagnosis: Coccosphaerales constans ex coccolithis cum R-unitis no nisi in proximo scuto.

Coccosphaerales consisting of coccoliths with R-units only in the proximal shield.

Description: Dominant phase of life-cycle, non-motile with placolith heterococcoliths. V-unit forms the distal shield and tube, extending to the proximal surface. R-unit forms the proximal shield. As in the Coccolithaceae, growth occurs downward from the proto-coccolith ring which becomes embedded within the structure so that alternating Vand R-units are only visible on specimens where the proximal shield has broken off. Distal shield sutures typically show laevogyral curvature. The proximal shield is usually monocyclic with radial sutures; sometimes it is bicyclic due to the development of a lower layer, with elements showing strong dextral obliquity (in proximal view). The connection between the proximal and distal shields is weak and they frequently separate.

Extra details from original publication
Comments: These genera have previously been included within the Coccolithaceae but the distinctively different structure appears to warrant classification in a separate family. The cytology of Umbilicosphaera is described by Inouye & Pienaar (1984).

References:

Inouye, I. & Pienaar, R. N. (1984). New observations on the coccolithophorid Umbilicosphaera sibogae var. foliosa (Prymnesiophyceae) with reference to cell covering, cell structure and flagellar apparatus. British Phycological Journal. 19: 357-369. gs

Young, J. R. & Bown, P. R. (1997). Cenozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 36-47. gs


nannotaxlogo400px

Calcidiscaceae: Catalog entry compiled by <% compiler %>. Viewed: 20-9-2024

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=55302 Go to Archive.is to create a permanent copy of this page - citation notes
nannotaxlogo400px

Nannotax is being sponsored through 2024 by Woodside Energy and Shell USA

Add Comment

* Required information
Captcha Image
Powered by Commentics

Comments

No comments yet. Be the first!