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Metacuvillierinella decastroi Fleury, 2016
Description Metacuvillierinella decastroi. 1–9: Population GGB184. 1–2, 7–9: A tests (2: holotype) in centered sections, almost equatorial (1), and axial (2, 7–9) with flattened and more or less sigmoid tests; note the streptospiral coiling of early stages devoid of partitions and the rare secondary chamberlets of rather same diameter as the primary ones; sections 2 and 7–8 are perfect illustrations of advolute coiling. 3–6: tests of B generation (4–5 only probable), not very larger than the A tests, with quinqueloculine central part (3 and 6), isodiametric chamberlets and faint sigmoid shape of sections 4–6. 10–18: Population I250. 10–15: A tests in centered sections; note particularly the streptospiral nepionic coiling around the proloculus, the few secondary chamberlets of same diameter as the primary ones; 14–15: tests with an uncommon large diameter and a final tendency to unroll; a flexostyle is probable on 15. 16 and 18: probable B tests with remarkable mesh-like pattern of isodiametric chamberlets in the last chambers; 17: A test in centered axial section with no secondary chamberlets; 19–21: Population GGB22. 19: typical off-centered oblique section of an A test; 20–21: two ordinary axial sections of A tests. Scale bars = 1 mm. The figured sections are included in thin slices deposited in the paleontological collections of the University of Lille, Sciences and Technologies under the following numbers. Fig. 2: USTL 3078. Fig. 5 and 6: USTL 3079. Fig. 9–11: USTL 3080 to USTL 82. Fig. 13–21: USTL 3084 to USTL 3091. Fig. 1, 3, 4, 7 and 8 were deposited by Fleury (1976) in the collection of Lyon University under no. FSL147804, -808, -814, -810, respectively. (From Fleury, 2016)
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added on 2024-02-1586 viewsForaminifera taxaDigital photo, part of species Metacuvillierinella decastroi Fleury, 2016 †checked Consorti, Lorenzo 2024-02-15
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