We have listed our latest finds of the rare prehistoric fossilised Cow shark teeth. Cow shark teeth are recognised by the comb like apical points or crowns, the cusplets, are triangular apical points. One can easily see where the name 'comb tooth' originates from once seen. A most distinctive feature of these types of teeth, which are invariably discovered in the fossil layers often broken due to the fragility of the slightly formed tooth morphology. Finding a good complete example is particularly demanding often requiring many dedicated hours of labour digging and sifting through tons of limestone material, making the Cow shark teeth a rare collectable, especially in good or pristine condition. You may see in our selection of shark teeth a comprehensive and varied group of fossil teeth which have been collected over several years and only now for the first time, offered for sale.
Welcome to our six gilled cow shark journal page where we have featured some of the latest fossil shark teeth finds from North Africa and feature illustrations of our web page listings of fossil teeth for sale. There is a link below to the pages where you may browse and buy fossil shark teeth.
The illustrations above and below are from our latest listing which you may view in the shark section from our main web site catalogue page here Visit our fossil sharks >This collection represents several months of collecting. More often than complete specimen teeth, pieces are discovered in the fossil bed layers, discovering whole teeth even broken whole teeth is a rare occurrence, hence these types of teeth are prized.
A little history of the six gill Cow sharks. The species Hexanchus agassizi, described by Cappetta, 1976, first appeared in the late Cretaceous period around 100 million years ago. While Notorynchus cepedianus, described by Ayres, 1855 appears around the late Paleocene 60 million years ago. The Cow shark teeth we offer here were discovered in Morocco in North Africa. The range of the extinct and extant six gill sharks was worldwide in prehistory and still is today.
The ancestors of the prehistoric six-gill sharks survive in the oceans of today. The four types are Broadnose sevengill, Blunt-nose sixgill, Sharp-nose sevengill, and the Big-eyed six gill. Blunt-nose six gill shark (Hexanchus griseus), often simply called the Cow shark, it is the largest hexanchoid shark, growing to 16 ft (4.9 m) in length. It is found in tropical and temperate waters worldwide and its diet is widely varied by region, often a carrion scavenger at great depths.
Today the deepwater sharks belong to the family Hexanchidae. Characterised by a broad, pointed head, six pairs of gill slits, comb-like yellow lower teeth, and long tails. Six gill sharks attain sizes of up to 8 metres in length, weighing over 600 kg (1320 lb.). Being abyssal plain scavengers with a keen sense of smell they can be found among the first predators to arrive at carrion and have been found at depths to 2,500 ft (760 m).
The images above and below clearly illustrate the number and positions of the comb teeth plates in modern day six gill sharks which has changed very little since the Paleogene period, where palaeontologists find fossil teeth today, in the Phosphate deposits of Khouribga, Ouled Abdoun Basin, Northern Western Sahara of Morocco.
Six gill Cow shark or broad-nose sharks do not have the archetypical triangular dorsal fin which typifies many other shark types, the illustration below exemplifies the differences in the missing dorsal fin six gilled sharks. For further reading go to the wikipedia page The Six Gill sharks on wikipedia >