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Blefuscuiana multicamerata Banner & Desai 1988 from: Banner, F.T.Desai, D. (1988): A review and revision of the Jurassic-Early Cretaceous Globigerinina, with special reference to the Aptian assemblages of Speeton (North Yorkshire, England) . J. micropalaeontol. Vol. 7(2) p. 143-185
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Species Blefuscuiana multicamerata Banner & Desai 1988


Diagnosis / Definition:
Banner & Desai (1988):
Test a low trochospire; spiral side flat or slightly concave, of two or three whorls, with about eight chambers in later whorls; chambers initially reniform and slightly depressed, becoming subglobular with growth. Intercameral sutures are subradial and distinctly but not deeply depressed on both the spiral and umbilical sides. The umbilicus has a breadth equal to about 20% of the test diameter; it is open and shallow. The aperture is a very low slit extending from the umbilicus to the periphery of the preceding whorl; it is furnished with a narrow porticus which broadens rapidly into a subtriangular flap at its posterior end. Relict apertures and their portical flaps are visible in the umbilicus for about half of the last whorl; the portical flaps are separate and not fused distally. The surface of the test is smooth, and not muricate; it is uniformly microperforate; the external diameters of the microperforations vary from about 0.8µm on the umbilical side to about lµm on the spiral side.
Discussion / Comments:
Banner & Desai (1988):
No other known species of Blefuscuiana has as many chambers per whorl as B. mullicumerata. This, together with its widely open umbilicus, subglobular chambers and lack of a tendency to pseudoplanospirality, distinguishes it from all species described by Longoria (1974) and other authors known to us.
Boudagher-Fadel et al. (1997):
Remarks: This species has eight subglobular (h/L = 1 approx.) chambers in the last whorl. The umbilicus (u/uh =0.5 approx.) is open and shallow.
Systematics:

22
 Superfamilia Globigerinaceae
  Familia Praehedbergellidae
   Subfamilia Praehedbergellinae
    Genus Blefuscuiana
     Species Blefuscuiana multicamerata
Synonym list:
Banner & Desai (1988):
1988 Blefuscuiana n sp. multicamerata Banner & Desai. - Banner & Desai : 162, 163 pl 6 figs 4-6
Boudagher-Fadel et al. (1997):
1988 Blefuscuiana multicamerata Banner & Desai. - Banner & Desai : p.165 pl. 6; fig. 7a-d
1997 Blefuscuiana multicamerata Banner & Desai. - Boudagher-Fadel et al. : p.151 pl. 8.8; fig. 9, 10; Figure: 8.1
References:

Longoria,J.F. (1974):
Stratigraphic, morphologic and taxonomic studies of Aptian planktonic Foraminifera . Revista Espanola de MicropaleontologíaNo extraord p. 1-107

Banner,F.T. and Desai,D. (1988):
A review and revision of the Jurassic-Early Cretaceous Globigerinina, with special reference to the Aptian assemblages of Speeton (North Yorkshire, England) . J. micropalaeontol. Vol. 7(2) p. 143-185

Boudagher-Fadel,M.K.; Banner,F.T.; Whittaker,J.E. and Simmons,M.D. (1997):
Early Evolutionary History of Planktonic Foraminifera. Vol. 1
Anonymous: Unedited TaxonConcept data
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