Menaspid fish armour fossil. Coloured scanning electron micrograph (SEM). The menaspidi (Menaspidae) are a family of extinct cartilaginous fish that lived in the Carboniferous and Permian period (340-270 million years ago). Their remains have been found in Scotland, Germany, United States and Australia.The front part of the body of some menaspidi (Menaspis and Deltoptychius ) was covered by a considerable reinforcement of boney plates. Magnification: x60 at 10cm high.
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