CATALOG OF ORIGINAL DESCRIPTIONS: Blefuscuiana albiana BouDagher-Fadel et al. 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 albiana
Other pages this level: B. albiana, B. aptiana depressa, B. aptiana implana, B. aptiana orientalis, B. daminiae, B. excelsa cumulus, B. globigerinelloides 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 albiana

Citation: Blefuscuiana albiana BouDagher-Fadel et al. 1996
Rank: Species
Type locality: Predoroshnaya, SW Crimea
Type level: Upper Albian
Holotype Repository: London, UK; NHM
Holotype number: PF53012

Current identification/main database link: Microhedbergella albiana (Boudagher-Fadel et al., 1996)


Original Description: B. albiana has five subglobular chambers in the last whorl, which enlarge rapidly with growth, so that the addition of a new whorl increases the dorsal test diameter by almost twice. The umbilicus is small, as in B. infracretacea and is about 18 to 20% of the ventral test diameter. The aperture is slit-like with a thin porticus. The wall is smooth; the microperforations are irregularly spaced and are about 2 microns in diameter (twice as large as those of B. aptiana (Bartenstein) s.l. but about half the size as those of a true Hedbergella). There appears to be a slight but progressive increase in test size from B. aptiana (Bartenstein) s.s. (190-270 microns) and B. aptiana (Bartenstein) orientalis BouDagher-Fadel et al. (210-270 microns) in the Aptian to B. albiana (220-290 microns) in the Albian. It has already been suggested that B. albiana evolved from B. aptiana s.s. above the base of the Albian (BouDagher-Fadel et al., 1996).

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.


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Blefuscuiana albiana compiled by the pforams@mikrotax project team viewed: 18-10-2017

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