Gyroptychius agassizi (Traill)
Reconstruction of Gyroptychius agassizi by C.Pander, 1860.
Complete specimen in lateral view, Sandwick Fish Bed.
Close up of the tail, from the specimen above.
Reconstruction. A: lateral and B: dorsal view (after Jarvik, 1948) ©.
Specimen in ventral view, (collection F.V.C.).
Close-up of the tail of the specimen in ventral view.
This osteolepid fish was the largest of its kind in the Sandwick Fish Bed sediments. It’s almost symmetrical tail and fin position make it easy to distinguish from the other osteolepids.
Normally in the Sandwick Fish Bed, this species is found one for every ten of Osteolepis specimens. It probably preyed on everything small enough to be swallowed whole. It is found in the Sandwick Fish Bed only.
Head in Dorsal view of well preserved specimen.
Reconstruction of the head. A: lateral view, B: dorsal view, C: ventral view (after Jarvik, 1948) ©.
Parietal and post parietal shield with extrascapulars.
Parietal shield or fronto-ethmoidal shield (old name).
Reconstruction of species (after Traquair, 1895).
