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JUVENILE MASTODON TAIL VERTEBRA WITH PATHOLOGICAL DEFORMATION Aucilla River - Florida, U.S.A. LATE PLIOCENE TO LATE PLEISTOCENE PERIOD: 1.8 million - 10,000 years ago Definitely one of the most unique mastodon fossils we have been able to secure and far more rare than a tooth, this is a caudal (tail) vertebra from a juvenile Florida mastodon called Mammut americanum or 'American' mastodon. The first image below shows an 'American' mastodon found in a Florida spring, and the position on the body from which it came is indicated by the green box. This particular specimen we are offering even displays a unique feature - the posterior neural process is pathologically deformed with a slight twisting as seen at the top of the second image above. Poor little mastodon! Must have hurt to sit down.Found in a Pleistocene river deposit in Florida, this vertebra was buried in a protective gravel bed, hence its excellent state of preservation. The surface is very dense and aside from its heavy weight and color from mineralization, it shows as nice as a modern bone. This very unique juvenile Mastodon vertebra boasts of no repair and no restoration. HIGHLY RECOMMENDED and rare! Emerging 55 million years ago, the group of mammals called Proboscideans are identified by the presence of tusks and a trunk and comprise three families: Mammutidae, Gomphotheriidae and Elephantidae. In Florida, the mastodon, a member of the family Mammutidae (mammoths are members of Elephantidae), represents one of two of the oldest known proboscideans first dating back to the Miocene. They became extinct 11,000 years ago along with all other proboscideans in Florida. When standing aside a mammoth, the mastodon looks just like a Neanderthal version of the proboscideans. The body form is shorter, more stout and robust and lends itself to a much more muscular physique in contrast to the more graceful and taller mammoth. The cheek teeth of mastodons are also more primitive with sharp crests and a dramatic lobed surface in unworn examples compared to the flat and fine ridged surface of mammoth teeth that resemble the sole of a boating sneaker. These differences tell us about the types of food that both types of creatures ate. The mastodon was more suited for forest environments with teeth that were well adapted for chewing tougher vegetation like twigs, leaves, shrubs, fruits, pinecones, pine needles and mosses. The mammoth with its smoother teeth, was best suited for the open plains feeding on a variety of grasses. A mastodon, like all proboscideans, has a system of horizontal tooth replacement whereby new molars erupt from the rear of the jaw and move forward. The most worn teeth at the front, are pushed out of the jaw. Sometimes while still in the jaw, the anterior portion of a worn front tooth is broken off. These partial teeth are found as fossils along with complete specimens. A baby proboscidean at age 6, will have already had three sets of teeth. By 13 years of age, the fourth set emerges followed by a fifth set at age 27 years. The final set of teeth come in around 43 years of age and as it wears away, the animal eventually starves to death and dies on average between 60 and 80 years of age. Interestingly, the animal's life is limited by the fact that after the sixth set, no new teeth grow in to replace the final worn down set and the animal is no longer able to chew its food. This characteristic is still true of modern elephants. RARE AND UNCOMMON FOSSIL - DENSE AND HEAVY WITH EXCELLENT MINERALIZATION! 7.25" wide by 4" deep SOLD LM15001 INCLUDES STAND Actual Item - One Only
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Location of this caudal vertebra for sale |
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Florida 'American' mastodon |
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Comparison of the skeletal structure and body types of a Florida 'American' mastodon (left) and a Florida 'Columbian' mammoth (right) |
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