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Spiniferites magnoserratus
Spiniferites? magnoserratus (Cookson and Eisenack, 1962) Stover and Evitt, 1978
Originally Pterodinium, subsequently (and now) Spiniferites?, thirdly Gonyaulacysta.
Yun, 1981, transferred this species to Gonyaulacysta Deflandre, 1964. Lentin and Williams, 1985, questionably retained it in Spiniferites.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Spiniferites.
Holotype: Cookson and Eisenack, 1962, pl.3, fig.7-8
Locus typicus: Perth Basin, Caversham, Rakich"s bore, Australia
Stratum typicum: ?Albian-Aptian
Original diagnosis: Cookson and Eisenack, 1962, p.490: Pterodinium magnoserratum
Shell oval, divided almost equally by a narrow helicoid girdle bordered by low ledges. The longitudinal furrow extends from the lower part of the epitheca nearly to the antapex, the broadest part being in the upper part of the hypotheca. Apical and antapical horns are not developed. The tabulation seems to be similar to that of P. alatum Eisenack. The fields are bordered by relatively high, coarsely serrated wing-like membranes, the "teeth" of which are separated by rounded spaces and are som etimes slightly bifurcate . At the corner s of the fields the joined edges of the wings extend somewhat before bifurcating distally. This feature is most prominent at the apex and in the region of the girdle.
Dimenisons: Holotype: Over-all length 104 µm; breadth 100 µm; shell 76x67 µm.
Affinities:
Cookson and Eisenack, 1962, p.490: Pterodinium magnoserratum
P. magnoserratum appears to have some affinity with the German Hauterivian specimens mentioned and figured by Gocht (1959, p.76, pl.7, figs.17-18) under the name Pterodinium sp.
Originally Pterodinium, subsequently (and now) Spiniferites?, thirdly Gonyaulacysta.
Yun, 1981, transferred this species to Gonyaulacysta Deflandre, 1964. Lentin and Williams, 1985, questionably retained it in Spiniferites.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Spiniferites.
Holotype: Cookson and Eisenack, 1962, pl.3, fig.7-8
Locus typicus: Perth Basin, Caversham, Rakich"s bore, Australia
Stratum typicum: ?Albian-Aptian
Original diagnosis: Cookson and Eisenack, 1962, p.490: Pterodinium magnoserratum
Shell oval, divided almost equally by a narrow helicoid girdle bordered by low ledges. The longitudinal furrow extends from the lower part of the epitheca nearly to the antapex, the broadest part being in the upper part of the hypotheca. Apical and antapical horns are not developed. The tabulation seems to be similar to that of P. alatum Eisenack. The fields are bordered by relatively high, coarsely serrated wing-like membranes, the "teeth" of which are separated by rounded spaces and are som etimes slightly bifurcate . At the corner s of the fields the joined edges of the wings extend somewhat before bifurcating distally. This feature is most prominent at the apex and in the region of the girdle.
Dimenisons: Holotype: Over-all length 104 µm; breadth 100 µm; shell 76x67 µm.
Affinities:
Cookson and Eisenack, 1962, p.490: Pterodinium magnoserratum
P. magnoserratum appears to have some affinity with the German Hauterivian specimens mentioned and figured by Gocht (1959, p.76, pl.7, figs.17-18) under the name Pterodinium sp.