Blefuscuiana sp. from: Boudagher-Fadel, M.K.Banner, F.T.Whittaker, J.E.Simmons, M.D. (1997): Early Evolutionary History of Planktonic Foraminifera. Vol. 1 . |
Notice: This catalogue page may contain unedited data.
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Species Blefuscuiana sp. |
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Discussion / Comments: |
Boudagher-Fadel et al. (1997):
Remarks: When Antonova (1964) erected
Globigerina tuschepsensis, she published only
drawings of her new species. Later, Gorbachik
(1986) used scanning electron micrographs to
illustrate a topotypic paratype with clearly asymmetric
chambers. However, she only illustrated a
part of its dorsal side. We have now been able to
examine this paratype and photograph it by SEM
(Plate 8.12, Figs 7-9) to prove that it has indeed
more than four chambers abutting the umbilicus
and it belongs to the genus Blefuscuiana, while
the holotype of tuschepsensis (also figured here by
SEM for the first time on Plate 7.1, Figs 4-7) has
only four chambers abutting the umbilicus, and is
a Praehedbergella. Blefuscuiana sp. is the only
known species of Blejiiscuiana which possesses
asymmetrical chambers, which become highest
posteriorly (h/L = 0.7 approx., but L1/L2 = 1.5
approx.). It is known only from a single specimen
which was included amongst the two paratypes of
Praehedbergella tuschepsensis by Antonova
(1964) in the collections of Moscow State
University. |
Systematics: |
22 Superfamilia Globigerinaceae
Familia Praehedbergellidae
Subfamilia Praehedbergellinae
Genus Blefuscuiana
Species Blefuscuiana sp.
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Synonym list: |
Boudagher-Fadel et al. (1997):
1997 Blefuscuiana sp. . - Boudagher-Fadel et al. : p.159 pl. 8.12; fig. 7-9; Figure: 8.1
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References: |
Gorbatchik,T.N. (1986): Jurassic and Early Cretaceous planktonic foraminifera of the south of the USSR [in Russian]. p. 239
Boudagher-Fadel,M.K.; Banner,F.T.; Whittaker,J.E. and Simmons,M.D. (1997): Early Evolutionary History of Planktonic Foraminifera. Vol. 1
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