Museum Grade Avitelmessus Cretaceous Fossil Crab

Avitelmessus grapsoideus

Subphylum Crustacea, Class Malacostraca, Order Decapoda, Infraorder Brachyura, Superfamily Cancroidea, Family Atelecyclidae

Geological Time: Cretaceous (67 million years ago)

Size: Crab fossil is 10.8 cm (4 3/16”) in width by 7 cm (2 7/8”) in length

Fossil Site: Peedee Formation, North Carolina

Fossil Code: PFD47

Price: Sold

Avitelmessus grapsoideusDescription: Avitelmessus grapsoideus is one of the best-known fossil crabs in the world, but rarely if ever found in this condition! Most specimens are of relatively poor quality, with little detail, and are best known from the Ripley formation. This particular specimen is from the same formation as the type specimen described by Rathbun early in the century, the PeeDee formation of North Carolina. At a whopping 67 million years old, this specimen was found in a small quarry alongside numerous other cretaceous fauna including remains of large reptiles, actual dinosaurs, ammonites, and echinoids. Virtually the entire coastal ecosystem was represented.

Museum Grade Avitelmessus Cretaceous Fossil CrabSpecimens of this quality are extremely rare with only a few existing in private or public collections. Many partial specimens from the now lost site (currently a bass stocked lake) were used in several recent publications describing primary and secondary sexual characteristics and other features of this species almost never seen preserved even in much much younger species such as those famous specimens from Italy (usually composites, incidentally- not so this ancient specimen)

Covered "head to toe" in spikes, spines, and pustules, this specimen looks as if it could get up and walk off away. It is completely matrix free, thus revealing the full ventral side. This it is 3D with life-like preservation. Both arms are fully intact and the claws are present though missing three of the four pincer tips. Five residual legs are present. Interestingly, the species is known to have ten legs, of course, but the rear most legs are almost never found intact on any specimen from anywhere- it is assumed they are extremely reduced relative to the remaining legs- a feature of this crabs family, the Atelecyclidaedakotacancridae.

Specimens like this are likely never to be seen again, and this specimen would enhance any collection, public or private. This is the larger of two that I just acquired from a close to final liquidation of the collectors holdings. These two will be the last of these exquisite Avitelmessus. The other has not yet been posted. (The $4500.00 huge Avitelmessus, PFD47, still up on display on my Crustacean page 1 was recently purchased, and will be donated to a museum in Australia. In fact, museums around the globe are clamoring for one of these to add to their collections (though enough information has been gather from partial specimens to make this one of the better understood fossil families in history!). In life, like crabs of now, those spines and bumps served as anchor points for sponges, algae’s and the like to help in the camouflage of this unique animal. One can imagine it was probably not very appetizing to swallow with the longer spines as well (although, clearly bitten partial specimens were uncovered during the existence of the quarry).

This crab was preserved in what we have found must have been a catastrophic burial (localized underwater slide or hurricane event.) All the fossils found are found in relatively very shallow lenses in the Peedee of North Carolina, and a very small arial range.

This museum fossil comes with our highest recommendation.

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