CATALOG - Arkhangelskiales


Folder trail: Farinacci -> A -> Arkhangelskiales
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Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the 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 compiled by Prof A. Farinacci 1969-1989 and updated by Richard Howe 2000-2016 - see also this page.
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Current identification/main database link:

Compiled data

Citation: Arkhangelskiales Bown & Hampton in Young & Bown 1997
Rank: Order
Type species: Arkhangelskiella
Farinacci catalog page (& compiler): n/a


Original Description
Tiered 'placoliths' (see comments), with 3-5 closely appressed 'shields'. Central-area structures include transverse bars with proximal net; axial or near-axial crosses with proximal net; and perforate plates crossed by axial or near-axial sutures. LM images vary significantly, from predominantly dark in the Kamptneriaceae, to predominantly bright in the Arkhangelskiellaceae.

Extra details from original publication
Comments: The Kamptneriaceae appears to have originated from loxolith coccoliths, and the tiered placolith rim structure is actually a modified loxolith construction (Hampton et al., in prep.). The earliest representatives of the family are only slightly modified loxolith coccoliths. Such an evolutionary history has not yet been established for the Arkhangelskiellaceae.

References:

Young, J. R. & Bown, P. R. (1997b). Higher classification of calcareous nannofossils. Journal of Nannoplankton Research. 19(1): 15-20. gs V O


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Arkhangelskiales: Catalog entry compiled by Jeremy Young. Viewed: 23-11-2020

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