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Hajar | profile | all galleries >> Palaeogalleries >> Palaeozoic Vertebrates >> Permian Vertebrates tree view | thumbnails | slideshow

Permian Vertebrates

A skull of the Lower Permian temnospondyl, Trimerorhachis, and a near-complete Upper Permian "parareptile", Barasaurus in the order Procolophonomorpha. Only the distal parts of the tail and two limbs extended beyond the limits of the concretion. In situ gastroliths can be seen in the animal's abdomen.

The German Xenacanthus is the classic spine-headed freshwater shark of the period.

The Acentrophorus represents a new type of fishes - the holosteans. It belongs to the order Semionotiformes. An Acentophorus similar to this one was my first ever find from the marl Slate, back in 1980.
Trimerorhachis insignis, 12 cm skull, Lower Permian, Hennessy Formation, Tillman County, Oklahoma, USA. Trimerorhachis insignis, 12 cm skull, Lower Permian, Hennessy Formation, Tillman County, Oklahoma, USA. Barasaurus besairiei (Piveteau 1955), Upper Permian Lower Sakamena Formation, Morondava Basin, Madagascar
Barasaurus besairiei (Piveteau 1955), Upper Permian Lower Sakamena Formation, Morondava Basin, Madagascar Xenacanthid shark, Xenacanthus humbergensis, 48 cm, Lower Permian, Pfalz, Germany. Xenacanthid shark, Xenacanthus humbergensis, 46 cm, Lower Permian, Pfalz, Germany.
Xenacanth head spine Xenacanth cartilage tesselation Acentrophorus varians, 6 cm, Late Permian Marl Slate, Thrislington Quarry, County Durham, the earliest holostean

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