CATALOG OF ORIGINAL DESCRIPTIONS: Blefuscuiana aptiana depressa depressa Banner, Copestake &White 1993

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 -> B -> Blefuscuiana -> Blefuscuiana aptiana depressa depressa
Other pages this level: B. albiana, B. aptiana depressa depressa, B. aptiana implana implana, B. aptiana orientalis, B. daminiae, B. excelsa cumulus, B. globigerinelloides lobulata, B. hexacamerata, B. kuznetsovae, B. laculata alobata alobata, B. laculata laculata, B. mitra, B. multicamerata, B. occulta quinquecamerata, B. rudis, B. speetonensis, B. speetonensis tunisiensis, B. whittakeri,

Blefuscuiana aptiana depressa depressa

Citation: Blefuscuiana aptiana depressa depressa Banner, Copestake &White 1993
Rank: sub-species
Holotype Repository: London, UK; NHM
Holotype number: 52711

Current identification/main database link: Blefuscuiana depressa (Banner, Copestake &White, 1993)


Original Description: Test about 0.15-0.2mm at its maximum diameter, comprising about 2-3 whorls coiled in a low trochospire, each with 5-5.5 chambers. The spiral side is almost flat or slightly convex and the intercameral sutures are moderately depressed, forming angles of about 130-135 degrees at the periphery of the test. The chambers are symmetrical and increase in size gradually with growth, becoming depressed in the second and (when present) third whorl, being about half as high as long when viewed dorsally. The last chamber may be about as high as long. The umbilicus is 'open' and the aperture appears to be a narrow slit. The test surface lacks perforation cones.

References:

Banner, F.T.; Copestake, P. & White, M.R., (1993). Barremian-Aptian Praehedbergellidae of the North Sea area: a reconnaisance. Bulletin of the Natural History Museum, London (Geology), 49: 1-30.


Catalog entry for Blefuscuiana aptiana depressa depressa compiled by the pforams@mikrotax project team viewed: 29-6-2017

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