Gyroptychius milleri Jarvik

 

This osteolepid does not differ much from Gyroptychius agassizi but there are some slight differences in the dermal plates covering the skull roof. The species can be found as loose scales and plates in sediments above the Sandwick Fish Bed.

Complete specimen in dorso-lateral view, Caithness

Close up of the head of above specimen in dorsal view

Parietal (old name: fronto-ethmoidal or just frontal

Post parietal (old name: parietal)

Loose scales

Scale in close up

Fish in ventral view

Reconstruction of head in A: lateral , B: dorsal and C: ventral view (after Jarvik, 1948 )

Drawing of postparietal and parietal (after Miller, 1849)

Reconstruction of postparietal and parietal (after Miller, 1849)