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Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: Biostratigraphy of large benthic foraminifera from Hole U1468A (Maldives): a CT-scan taxonomic approach

Fig. 3

biometry of LBF megalospheres. a Schematic drawing of a nummulitids, modified from Matteucci and Schiavinotto (1980); 1 marks the chambers of the first whorl; 2 marks the chambers of the second whorl; D1 = diameter of the first whorl; D2 = diameter of the second whorl. b Schematic drawing of an Heterostegina; X = 3, S3 + 4 = 4, S4 + 5 = 6 and S10 = 6. c Schematic drawing of a Cycloclypeus, modified from O’Herne (1972); FL = FL chamberlet of the first annular chamber; Y = 5 and SA = 27. d Schematic drawing of a Nephrolepidina embryo, modified from Van Vessem (1978); ACI = accessory auxiliary chambers of the protoconch. e Arrangement patter of equatorial chambers in Nephrolepidina, modified from Van Vessem (1978) and Chaproniere (1980); Stellate: F = 5; Wavy concentric: F = 4; Polygonal concentric: F = 3; Concentric rings: F = 2; Intersecting curves: F = 1

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