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EXTRA FOURTH CUSP IS OVERGROWN AND ATTACHED TO NORMAL CUSP AS SEEN ABOVE
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ULTRA RARE PATHOLOGICALLY DEFORMED XENACANTHUS PERMIAN SHARK TOOTH Wellington Formation - Jefferson Co, Oklahoma, U.S. PERMIAN PERIOD: 260 million years ago In all our extensive experience with Permian shark fossils from both the U.S.A. and abroad in Europe, we have never encountered a pathological Xenacanthus shark tooth specimen like this. Offered here is a severely deformed tooth that developed an additional fourth cusp growing out from the side of a major cusp. For the ultimate in Permian shark fossils, this is truly a prize and ULTRA-RARE specimen for the most advanced shark fossil collectors. Teeth of this primitive shark are rare with any deformities but this example is truly extreme. This deformed specimen is INTACT WITH NO REPAIR OR RESTORATION. It is 'as found' and has no breakage or modern damage. Root is complete and very dense. This is a remarkable example and certainly one that we will NEVER have like it again. Ex-old private collection. The now extinct Xenacanthus was a highly specialized freshwater shark that existed from the Devonian Period 345 million years ago to the Permian Period. A long spine grew from the back of the head followed by a long and continuous ribbon-like dorsal fin that gave it the appearance of an eel. The double forked teeth were another unique characteristic most likely used to feed on small crustaceans and bony fish. A full grown Xenacanthus attained lengths of 3 feet. THE ULTIMATE IN RARE PATHOLOGICAL SHARK FOSSILS - A ONCE IN A LIFETIME FIND! 4 mm wide $195 SH13-001 INCLUDES DISPLAY BOX Actual Item - One Only |
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