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Pterodinium magnoserratum
Pterodinium magnoserratum Cookson and Eisenack, 1962
Now Spiniferites?. Originally Pterodinium, subsequently (and now) Spiniferites?, thirdly Gonyaulacysta.
Holotype: Cookson and Eisenack, 1962, pl.3, fig.7-8
Locus typicus: Perth Basin, Metropolitan area, Caversham, Rakich"s bore, between 350 and 355 ft
Stratum typicum: Aptian-Albian
Original diagnosis: Cookson and Eisenack, 1962, p.490
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 sometimes 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 76 x 67 µm.
Affinities:
Cookson and Eisenack, 1962, p.490: 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.
Now Spiniferites?. Originally Pterodinium, subsequently (and now) Spiniferites?, thirdly Gonyaulacysta.
Holotype: Cookson and Eisenack, 1962, pl.3, fig.7-8
Locus typicus: Perth Basin, Metropolitan area, Caversham, Rakich"s bore, between 350 and 355 ft
Stratum typicum: Aptian-Albian
Original diagnosis: Cookson and Eisenack, 1962, p.490
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 sometimes 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 76 x 67 µm.
Affinities:
Cookson and Eisenack, 1962, p.490: 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.