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Re: Archaeopteryx Trip 2001



HP Randall Irmis has taken a photo of the text accompanying Borsti. Here's
the translation:


A NEW SMALL DINOSAUR-OF-PREY FROM BAVARIA

The only small dinosaur-of-prey (theropod) that was known from Bavaria so
far is *Compsognathus longipes* found in the Solnhofen layers of
Jachenhausen. A second, but considerably bigger specimen of *Compsognathus*
comes from layers of about the same age near Canjuers in the Provence
(France).

In summer 1998 the brothers Hans and Klaus-Dieter Weiß [who have meanwhile
found a _second_ new theropod!!!] from ?Kehlheim-Fischbach made a
spectacular finding of a small dinosaur-of-prey on the digging area of the
Jura-Museum near Schamhaupten (sort-of-political-district Eichstätt). The
area had been leased for a scientific dig from Mr Franz Stark.

The fossiliferous layer are silica-plate-limestones of the Upper Jurassic,
more precisely the uppermost Kimmeridgian, the absolute age of which is
estimated at 151 -- 152 million years. They are thus 1 -- 2 million years
older than the Solnhofen plate-limestones.

The new dinosaur-of-prey is a juvenile animal. This is indicated by the many
pores in the bones and their low degree of fusion. Conspicuous are the large
teeth that are only serrated at the posterior side as in *Compsognathus*.

Preparation of the fossil is extremely difficult because the sediment is
silicified and harder than steel. So far practically only the head has been
prepared. Because the vertebral column of the neck goes into the big plate
it was originally thought that this plate contains most of the animal. The
skeleton could not be made visible by normal X-ray technique. By means of a
special computer tomography the Fraunhofer-Institut [für?] integrierte
Schaltungen [integrated circuits] in Fürth has now managed that. It was
shown that the big plate contains in essence only an arm which is
considerably longer as in [*Compsognathus*, probably. Apparently a line is
lacking here.]
computer program was made available which shows the skull as well as the arm
of the little theropod in a series of extremely thin cuts.