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.
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Citation: Arkhangelskiales Bown & Hampton in Young & Bown 1997taxonomic rank: OrderType species: ArkhangelskiellaFarinacci 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.
Young, J. R. & Bown, P. R. (1997). Higher classification of calcareous nannofossils. Journal of Nannoplankton Research. 19(1): 15-20. gsO
Arkhangelskiales: Catalog entry compiled by Jeremy Young. Viewed: 5-12-2023