Blefuscuiana kuznetsovae 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 . |
Notice: This catalogue page may contain unedited data.
To find validated information on this taxon please visit the following project pages: |
Species Blefuscuiana kuznetsovae Banner & Desai 1988 |
|
|
Diagnosis / Definition: |
Banner & Desai (1988):
Test a low trochospire, completely evolute and flat or slightly concave on the spiral side, with six to eight chambers in the last whorl. On the spiral side,chambers are inflated, subglobular, approximately as high as long, intercameral sutures being depressed and radial or very slightly oblique. The spire opens slowly;on the spiral side the test diameter is 2.5-2.8 times the height of the last formed chamber. The umbilicus is broad (about 0.27 of the test diameter) and shallow; on this side, the sutures are depressed and radial. The aperture is a low arch, from the umbilicus to the periphery of the penultimate whorl, with a distinct porticus which broadens slightly posteriorly; discrete relict apertures and their portici are open for at least half of the last whorl. The wall is smooth and
microperforate, the external openings of the perforations being 0.6-0.7µm in diameter, spaced at 1.3-5 µm distances. |
Discussion / Comments: |
Boudagher-Fadel et al. (1997):
Remarks: B. kuznetsovae has seven chambers
abutting the umbilicus in the last whorl. Last
chambers are inflated, subglobular (h/L = l
approx.), and almost as high as long (L1 = L2). The
umbilicus is broad (u/uh = 0.27 approx.) and
shallow. The aperture is a low arch, from the
umbilicus to the periphery of the penultimate
whorl, with a distinct porticus which broadens
slightly posteriorly; relict apertures and their
portici are open for at least half of the last
whorl. |
Systematics: |
22 Superfamilia Globigerinaceae
Familia Praehedbergellidae
Subfamilia Praehedbergellinae
Genus Blefuscuiana
Species Blefuscuiana kuznetsovae
|
Synonym list: |
Banner & Desai (1988):
Boudagher-Fadel et al. (1997):
1988 Blefuscuiana kuznetsovae Banner & Desai. - Banner & Desai : p. 156-158 pl. 3, fig. 10;
pl. 4; fig. 1, 2, 4 (not fig. 3)
|
Was used in synonym list of: |
|
References: |
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
|
This work is licensed under a Creative Commons Attribution 2.5 License.
|
|