Seas and Shores of the Big Bend of Texas
From Mosasaurs to Dinosaurs

                     Ken Barnes
                     Founder & Curator

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AUTHORS NOTE: Do not cite or quote from this web page.  This is an early POSTER REPORT of  future manuscripts. THESE MARINE FOSSILS HAVE BEEN DONATED TO; Shuler Museum of Paleontology SMU, Dallas, Texas
This first batch of photos is about the stomach contents of a Tylosaurus nepaeolicus Mosasaur, that was about 6 meters long that ate three small Platecarpus planifrons Mosasaurs, and a Ptychodus shark. There are about 270 fossils. The last photo in this batch is the stomach contents of a five meter long Platecarpus planifrons that ate a bony fish.
More batches below                  click to enlarge
KB - M - 3 dig site
Stratigraphic column for some mosasaurs found
Slabs of rock containing fossil stomach contents, close- ups below.
Platecarpus planifrons stomach contents
# KB - TD - M - 19 was complete and articulated, 18.5 feet long, but totally eaten up with gypsum, what a shame.
These photos serve as a photo library of some of my significant fossils
This column of photos will cover some of my Tylosaur Mosasaurs, there will be several more batches below.
This is an area where we found several Mosasaurs,  sharks and bony fish etc.
KB - M -16, a complete skull of a Tylosaurus nepaeolicus, different views below.
Close-ups below
These two photos are of teeth that were in the roof of the rear of their mouth
Below are photos of, # KB - M - 11, a Platecarpus planifrons mosasaur.
Originally this Mosasaur  was named Clidastes planifrons, (Cope, 1875 ), plates XXII and XXIII. Later Williston ( 1898 ) correctly called it Platecarpus planifrons.
# KB - M - 11 dig site
These fossils are in or on the original rock slab only here they are upside down. Almost all Mosasaur skulls are found bottom side up.
Below are some of the fossils that were found separated from the slab
Below are fossils of # KB - BB - M - 13. These were found by Bill Bourbon at the base of a slope and we looked but found no more parts
# KB - BB - M - 5 was a small, 1.5 meter long, Platecarpus planifrons  found by Bill Bourbon mostly on the surface but some skull parts were in the ground so I saturated that area with a preservative until I could return and plaster jacket it later. When I returned a week or so later a coyote had dug the preserved area up and destroyed the whole thing so all I could do was gather all the loose parts, mostly vertebra etc. This quadrate is the only skull part I could salvage and it is in poor shape. 
#KB-TD-M-19 is a Platecarpus planifrons that was 18.5 feet long and totally articulated but eaten up with gypsum. We removed the skull in hopes the underside was in better shape but it was only a little better.
Tommy Diamond at KB-TD-M-19, which he found
Students working on the dig
The skull is in bad shape, gypsum%^&# and near the surface
Removing the skull jacket
The bottom side is not much better
Mike Everhart described a new species of Tylosaurus from Kansas in Oct. 2005, naming it Tylosaurus kansasensis. See Oceans of Kansas web-site.

I had a tylosaur in my collection that was a little different from T. nepaeolicus and when he described this new species we discovered that was what it was. KB-BB-M-14 is my specimen below.
Skull parts from 1st and 2nd jacket
Scapula from 2nd jacket
Students working on the 3rd jacket, earlier some idiot found this dig and destroyed most of the fossils off the top of the pedestal.
KB-M-15 is a very large Tylosaurus nepaeolicus,
the skull is 1300mm long. It is in its own limestone concretion and will take a long time to prepare out. It died trying to swallow a Toxochelys turtle, which is still in the ground.
What we found exposed
Starting the dig
Toxochelys turtle next to KB-M-15 jaw
Removing the limestone concretions along fracture lines
Starting the slow process of preparing the skull out
Removing the tip of the tail
Bellow are photos and my comments on Ptychodus mortoni and P. mortoni like teeth.
They had a pavement of upper and lower teeth to crush clams and oysters. There were 90 + of these teeth in the stomach contents above.
P. mortoni like natural set of lowers
Dallas area P. mortoni like natural set of lowers
An associated set of 600+/- P. mortoni teeth being  assembled
# 16 medial lower row of above.
Another set of associated P. mortoni teeth.
An associated set of teeth that are different from the above P. mortoni like teeth, note high sharp crown etc. (uppers)
  Lowers left-------Uppers right
Note, I have corrected uppers and lowers below