Spiniferites makropterus Cookson and Eisenack, 1982

Now Pterodinium?. Originally Spiniferites, subsequently (and now) Pterodinium?.

Holotype: Cookson and Eisenack, 1982, pl.7, fig.2
Age: Middle Cretaceous
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Original description: [Cookson and Eisenack, 1982] (translated from German):

Spiniferites macropterus n. sp.
Plate 7, Figs. 1-3

Type: The specimen shown on Plate 7, Fig. 2, preserved in Gingin Brook No. 1.
Diagnosis: Central shell with smooth, smooth-edged, very broad wing ridges.
Relationships: Similar to Sp. cingulatus (O. WETZEL 1933) (SARJEANT 1970) = Pterodinium cingulatum (O. WE.) BELOW 1981, but with broader wing ridges. The assignment to Pterodinium is not followed here.
Material and dimensions: Approximately 5 specimens. Central shell (type): approx. 70 x 67 μ, total approx. 109 x 114 μ. The remaining specimens range in size from approx. 55 x 60 to 60 x 62 μ, and 95 x 100 to 100 x 105 μ, respectively.
Remarks: The highly developed wing ridges make the study of the paneling difficult.
It is therefore necessary to consider the other specimens in addition to the type specimen. The specimens prepared by Dr. Cookson were heavily stained with safranin red. Therefore, infrared photographs had to be taken.
Occurrence: Gingin Brook borehole at 409-414 ft.