CATALOG OF ORIGINAL DESCRIPTIONS: Blefuscuiana mitra Banner and Desai 1988

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 mitra
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 mitra

Citation: Blefuscuiana mitra Banner and Desai 1988
Rank: Species
Type locality: Speeton Cliff, Finley Bay, North Yorkshire
Type level: Late Aptian
Holotype Repository: London, UK; NHM
Holotype number: P52089

Current identification/main database link: Hedbergella mitra (Banner and Desai, 1988)


Original Description: The test is a low trochospire with five to six chambers in each of three whorls. The spiral side is evolute and flat; the chambers are normally subglobular, only the last one or two becoming radially subovoid and with increasingly depressed sutures. The intercameral sutures are subradial on both the spiral and umbilical sides. The umbilicus has a breadth equal to about 20% of the test diameter. The aperture is a low arch extending from the umbilicus to the periphery of the previous whorl and extending over it into the spiral suture in the last formed chamber; the aperture has a porticus extending from the umbilicus (where it is broadest) to the periphery but not beyond it. The surface of the test is smooth and microperforate (external perforations about 0.6 microns in diameter); a narrow imperforate zone may be present in the spiral suture where the aperture encroaches on to the spiral side.

References:

Banner, F.T. & Desai, D., (1988). A review and revision of the Jurassic-Early Cretaceous Globigerinina,with especial reference to the Aptian assemblages of Speeton (North Yorkshire, England). Journal of Micropaleontology, 7: 143-185.


Catalog entry for Blefuscuiana mitra compiled by the pforams@mikrotax project team viewed: 23-5-2017

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