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: Axopodorhabdaceae Bown & Young 1997taxonomic rank: FamilyType species: Axopodorhabdus Wind & Wise in Wise & Wind, 1977.Described on page(s) : 25Current citation: Axopodorhabdaceae Bown & Young 1997
Original Description Placoliths with two narrow shields and a wide central-area, spanned by axial crossbars or granular plates with variable numbers of perforations; the central structure generally supports tall, hollow spines. The distal shield is formed from V-unit clements joined along radial or near- radial sutures which show little or no imbrication. The proxi- mal shield and inner cycle (if present) arf formed from R- units. LM image is generally dark, but bright inner-cycles may be developed. The image is characterised by clearly visible shield elements, often giving a 'beaded' appear- ance around the inner edge of the shields. Extra details from original publication Comments: We have abandoned the name Podorhabdaceae in favour of Axopodorhabdaceae due to problems associated with the type genus of the former family (Podorhabdus, type species P grassei Noel, 1965). Many authors believe that the holotypc illustrations of P grassei represent a species of Discorhabdus, which should then be classified in the Family Biscutaceae. It would be extremely undesirable to use Podorhabdus for those coccoliths presently within Discorhabdus, or to use Podorhabdaceae to replace Biscutaceae; the informal term podorhabdid is useful, and widely used to describe the coccoliths classified together in the Axopodorhabdaceae.
References:
Bown, P. R. & Young, J. R. (1997). Mesozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 21-36. gs
Axopodorhabdaceae: Catalog entry compiled by <% compiler %>. Viewed: 14-10-2024
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