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Spiniferites cooksoniae
Spiniferites cooksoniae Lentin and Williams, 1977, nom. subst. pro Spiniferites granulatus Cookson and Eisenack, 1974, non Spiniferites granulatus (Davey, 1969) Lentin and Williams, 1973
Originally Spiniferites granulatus (an illegitimate specific name), subsequently (and now) Spiniferites cooksoniae.
Holotype: Cookson and Eisenack, 1974, pl.27, fig.7
Age: ?AptianAlbian
Original diagnosis: Cookson and Eisenack, 1974, p.59: Spiniferites granulatus
Shell oval, dense and highly granulated, so that in the optical cross-section the margin appears to be finely serrated. Furrows flat, bordered by very low lists and hard to see. On hypotract longitudinal furrow is broad. Processes only short, furcated solely at the outermost extremity with prongs arranged in V-shaped form. Spanning-membranes developed only sporadically and pulling themselves upward onto the processes. Archaeopyle approximately rectangular (slightly deformed through compression).
Dimensions: shell about 48 x 40 microns, overall about 65 x 60 µm, processes up to 16 µm.
Occurrence: Power House bore, at 640 ft.
Originally Spiniferites granulatus (an illegitimate specific name), subsequently (and now) Spiniferites cooksoniae.
Holotype: Cookson and Eisenack, 1974, pl.27, fig.7
Age: ?AptianAlbian
Original diagnosis: Cookson and Eisenack, 1974, p.59: Spiniferites granulatus
Shell oval, dense and highly granulated, so that in the optical cross-section the margin appears to be finely serrated. Furrows flat, bordered by very low lists and hard to see. On hypotract longitudinal furrow is broad. Processes only short, furcated solely at the outermost extremity with prongs arranged in V-shaped form. Spanning-membranes developed only sporadically and pulling themselves upward onto the processes. Archaeopyle approximately rectangular (slightly deformed through compression).
Dimensions: shell about 48 x 40 microns, overall about 65 x 60 µm, processes up to 16 µm.
Occurrence: Power House bore, at 640 ft.