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| Anonymous: Unedited TaxonConcept data | ||||||
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Species Blefuscuiana mitra Banner & Desai 1988 | ||||||
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| Diagnosis / Definition: | ||||||
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Banner & Desai (1988): The test is a low trochospire with five to six chambers in each of three whorls. The spiral side is evolute and flat; the chambers are normally subglobular, only the last one or two becoming radially subovoid and with increasingly depressed sutures. The intercameral sutures are subradial on both the spiral and umbilical sides. The umbilicus has a breadth equal to about 20% of the test diameter. The aperture is a low arch extending from the umbilicus to the periphery of the previous whorl and extending over it into the spiral suture in the last formed chamber; the aperture has a porticus extending from the umbilicus (where it is broadest) to the periphery, but not beyond it. The surface of the test is smooth and microperforate (external perforations about 0.6µm in diameter); a narrow imperforate zone may be present in the spiral suture where the aperture encroaches on to the spiral side. |
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| Discussion / Comments: | ||||||
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Banner & Desai (1988): Like B. speetonensis, B. mitra shows a tendency towards planispirality in the last few chambers but it is distinguished by its smaller umbilicus, consistently more globular chambers, which are typically fewer in each whorl, and by the high, cowl-like or mitre-like doming of the last chambers (which never leads to elongation as in Lilliputianella). Boudagher-Fadel et al. (1997): Remarks: This species has five chambers abutting the umbilicus. The chambers are normally subglobular, only the last ones are as high as long (h/L= l approx.). The dorsal side is flat to concave. The intercameral sutural angles are narrow. Like B. speetonensis Banner and Desai s.l., B. mitra shows a tendency towards planispirality in the last few chambers but it is distinguished by its smaller umbilicus (u/uh = 0.4 approx.) and fewer, more globular chambers (h/L = 0.9 approx .) . |
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| Systematics: | ||||||
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22 Superfamilia Globigerinaceae Familia Praehedbergellidae Subfamilia Praehedbergellinae Genus Blefuscuiana Species Blefuscuiana mitra |
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| Synonym list: | ||||||
| Banner & Desai (1988): 1959 Globigerina infracretacea Glaessner. - Obregon De La Parra : p.149 pl 3 figs 6a-b
1988 Blefuscuiana n sp. mitra Banner & Desai. - Banner & Desai : 162, 163 pl 6 figs 4-6
Boudagher-Fadel et al. (1997): ? 1959 Globigerina infracretacea Glaessner. - Obregon De La Parra : p.149 pl. 3; fig. 6a-b
1988 Blefuscuiana mitra Banner & Desai. - Banner & Desai : p.164 pl. 6; fig. 4-6
1997 Blefuscuiana mitra Banner & Desai. - Boudagher-Fadel et al. : p.151 pl. 8.8; fig. 7, 8; Figure: 8.1
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| References: | ||||||
Obregon De La Parra,J. (1959): Banner,F.T. and Desai,D. (1988): Boudagher-Fadel,M.K.; Banner,F.T.; Whittaker,J.E. and Simmons,M.D. (1997): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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