CATALOG OF ORIGINAL DESCRIPTIONS: Blefuscuiana aptiana orientalis BouDagher-Fadel, Banner, Gorbachik, Simmons, & Whittaker 1996

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

Blefuscuiana aptiana orientalis

Citation: Blefuscuiana aptiana orientalis BouDagher-Fadel, Banner, Gorbachik, Simmons, & Whittaker 1996
Rank: sub-species
Type locality: NE Azerbaijan, in the neighbourhood of Nardaran village
Type age: Early Aptian
Type sample and level: AGA-1
Holotype Repository: London, UK; NHM
Type & figured specimens: Fig. 2 (4- 12), Fig. 3 ( 1-8); Holotype: BMNH PF 53013 pl 2 f4-5. Paratypes:BMNH PF 53014-Pf 53020.
Description on pages: 252-253

Current identification/main database link: Hedbergella aptiana Bartenstein 1965


Original Description
B. aptiana orientalis has a test about 0.21-0.27 mm at itsmaximum diameter. It has the same shape of test as B. aptiana sensu stricto with a flat to slightly concave dorsal side, five to six subglobular chambers in the final whorl with the last chambers being as high as long, but it has perforation cones on the early chambers and there is no porticus bordering the aperture.
This taxon differs from B. infracretacea sensu stricto in having subglobular chambers instead of depressed ones, a flat or slightly concave dorsal side instead of a convex one, and in the lack of prominent perforation cones on the last chambers.

Extra details from original publication
 Remarks: B. aptiana orientalis occurs in the Early Aptian of Qued Guetta in Tunisia (Fig. 3 (1, 2)), figured by SHAHIN (1993) as B. aptica from the Early Aptian of the Bardawil area, northern Sinai in Egypt, in the Early Aptian of NE Azerbaijan (Fig. 2 (4-11)), in the Early Aptian (Ap2) of SW Crimea (Krasnaya) and the Late Barremian of the North Sea. It appears to be commonest in the cast of Alpine Tethys and also in the Atlas geosyncline; it is rare in the Barremian northwest of Tethys. Its stratigraphical range seems to be confined to the Late Barremian and the Early-Middle Aptian.

References:

BouDagher-Fadel, M. K., Banner, F. T., Gorbachik, T. N., Simmons, M. D. & Whittaker, J. E. (1996). Evolution in the Early Cretaceous planktonic foraminiferal genus Blefuscuiana. Neues Jahrbuch für Geologie und Palaeontologie Abhandlungen. 201(2): 243-258. gs

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Blefuscuiana aptiana orientalis compiled by the pforams@mikrotax project team viewed: 30-3-2020

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