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Sentusidinium ringnesiorum
From Fensome et al., 2019:
Sentusidinium ringnesiorum (Manum and Cookson, 1964, p.15, pl.2, fig.10) Wood et al., 2016, p.86. Holotype: Manum and Cookson, 1964, pl.2, fig.10. Originally Canningia, subsequently Canningia?, thirdly Batiacasphaera, fourthly Chytroeisphaeridia, fifthly Kallosphaeridium?, sixthly (and now) Sentusidinium. Taxonomic junior synonyms: Batiacasphaera floralis, Batiacasphaera granofoveolata, Batiacasphaera granulosa He Chengquan, Batiacasphaera henanensis, Batiacasphaera macrogranulata, Batiacasphaera macropyla, Batiacasphaera mica, Batiacasphaera norvickii, Batiacasphaera rugosa, Batiacasphaera sparsa, Batiacasphaera tuberculata, Batiacasphaera xinjiangensis, Escharisphaeridia dicrypta, Escharisphaeridia gaillardii, Escharisphaeridia granulata, Escharisphaeridia mantellii, Escharisphaeridia pocockii, Escharisphaeridia rudis, Escharisphaeridia senegalensis and Sentusidinium spatiosum, all according to Wood et al. (2016, p.86–87); Batiacasphaera vermiculatum (which see) and Pseudobohaidina granulata (which see), by implication. The epithet is correctly rendered as "ringnesiorum", rather than "ringnesii", since the species is named for the Ringnes brothers. Age: Campanian–Maastrichtian.
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Original description: Manum and Cookson, 1964, p.15-16: Canningia ringnesii
Shell almost circular, sometimes slightly broader than long, with or without a slight apical projection. Archeopyle apical, formed by the rupture of the shell along a more or less straight line a short distance behind the apex, sometimes small V-shaped notches can be observed along the edge. Wall thin, in surface view with a finely dotted pattern, in optical section the ornament is seen to be composed of somewhat club-shaped elements c. 1.0 µm Iong.
Dimensions: Holotype: 92 µm long, 93 µm broad. Range: 64-102 µm long, 57-100 µm broad.
Affinities:
Manum and Cookson, 1964, p. 16: Canningia ringnesii
Of the described species of Canningia, C. ringnesii comes closest to C. colliveri Cookson & Eisenack (1960b p. 251). It differs from the latter in the absence of an antapical indentation and in the composition of the shell-wall.
Sentusidinium ringnesiorum (Manum and Cookson, 1964, p.15, pl.2, fig.10) Wood et al., 2016, p.86. Holotype: Manum and Cookson, 1964, pl.2, fig.10. Originally Canningia, subsequently Canningia?, thirdly Batiacasphaera, fourthly Chytroeisphaeridia, fifthly Kallosphaeridium?, sixthly (and now) Sentusidinium. Taxonomic junior synonyms: Batiacasphaera floralis, Batiacasphaera granofoveolata, Batiacasphaera granulosa He Chengquan, Batiacasphaera henanensis, Batiacasphaera macrogranulata, Batiacasphaera macropyla, Batiacasphaera mica, Batiacasphaera norvickii, Batiacasphaera rugosa, Batiacasphaera sparsa, Batiacasphaera tuberculata, Batiacasphaera xinjiangensis, Escharisphaeridia dicrypta, Escharisphaeridia gaillardii, Escharisphaeridia granulata, Escharisphaeridia mantellii, Escharisphaeridia pocockii, Escharisphaeridia rudis, Escharisphaeridia senegalensis and Sentusidinium spatiosum, all according to Wood et al. (2016, p.86–87); Batiacasphaera vermiculatum (which see) and Pseudobohaidina granulata (which see), by implication. The epithet is correctly rendered as "ringnesiorum", rather than "ringnesii", since the species is named for the Ringnes brothers. Age: Campanian–Maastrichtian.
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Original description: Manum and Cookson, 1964, p.15-16: Canningia ringnesii
Shell almost circular, sometimes slightly broader than long, with or without a slight apical projection. Archeopyle apical, formed by the rupture of the shell along a more or less straight line a short distance behind the apex, sometimes small V-shaped notches can be observed along the edge. Wall thin, in surface view with a finely dotted pattern, in optical section the ornament is seen to be composed of somewhat club-shaped elements c. 1.0 µm Iong.
Dimensions: Holotype: 92 µm long, 93 µm broad. Range: 64-102 µm long, 57-100 µm broad.
Affinities:
Manum and Cookson, 1964, p. 16: Canningia ringnesii
Of the described species of Canningia, C. ringnesii comes closest to C. colliveri Cookson & Eisenack (1960b p. 251). It differs from the latter in the absence of an antapical indentation and in the composition of the shell-wall.