Paratriakis sp. (?) – Cretaceous – Lebanon

Paratriakis sp. (?)

Upper Cretaceous (95 mya)
Hajoula, Lebanon

 

EONS: L53 SUPERB 8.75″ SHARK WITH COMPLETE BACKBONE

Item number: 360104279934

Winning bid: US $183.50 

Ended: Nov-10-08 19:04:04 PST

Winning bidder: j***n

Seller: lowellcarhart

 

EONS: L53 SUPERB 8.75″ SHARK WITH COMPLETE BACKBONE

EVEN THE SANDPAPER-TEXTURED SKIN IS PRESERVED !

 

ORDER: Galeiformes
FAMILY: prob. Triakidae
GENUS: Paratriakis (tentative)
AGE: Upper Cretaceous (95 mya)
FOUND: Hajoula, Lebanon
SHARK LENGTH: 8.75 inches
SLAB DIMENSIONS: 11.75 inches x 8.25 inches x up to ¾ inch thick
NET WEIGHT: 5.6 lbs
SHIP WEIGHT: 8.5 pounds

 DESCRIPTION: A fossilized shark is rare enough, but this one has a COMPLETE notochord (backbone) whereas most specimens have only a partial one preserved. Be sure to examine and appreciate the rough texture of the superb skin impressions too. The way to determine the species of a fossil shark is to examine its teeth, but since small sharks have tiny, rarely-preserved teeth, we do not know what species this shark is – although it is certainly one of a small number of species that have been found in this formation. As is the case with all larger slabs from this formation, it has been repaired where shown in yellow lines. In addition, a color-matched tint was been applied at the repair sites to blend them in to adjacent areas. After the repair the slab was coated on the reverse with fiberglass resin for strength and safety.  

The fossil history of ground sharks (Carcharhiniformes) is known from a handful of preserved skeletons, but long intervening periods exist in which fossil skeletons of ground sharks have not been recovered. Ground sharks first appear in the late Jurassic (some 150 million years ago) Solnhofen limestones of Germany. These early fossils are not well preserved, but they bear some resemblance to modern catsharks (family Scyliorhinidae). After a long absence from the fossil record, fossil ground shark skeletons reappear in the late Cretaceous chalk deposits of Lebanon (ranging in age from 84 to 95 million years ago, or mya). These sharks (e.g., Pteroscyllium and Paratriakis) are thought to be related to catsharks and hound sharks (Triakidae), respectively, but on scant evidence. A few species of fossil catsharks from Lebanon are even placed in the living genus Scyliorhinus, which would give it a remarkable longevity of some 90 million years. These fossils have been studied only superficially, however, and they probably represent extinct genera of uncertain affinity. Remarkably, the fossil record of ground sharks parallels their phylogenetic history, where the most “primitive” family (Scyliorhinidae) also is the oldest. (source: http://www.answers.com)

COMPARABLES: Here is a similar shark that is half the size and less conserved for $895.00. Here’s an 8″ specimen that is less preserved for $1,500. And here’s a 6.7″ specimen that sold for $1,795. This shark up for auction is bigger and better than all of them.

 

 

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