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Re: WOOHOOO! DINOSAUR EMBRYOS!!!!!!



Betty Cunningham <bettyc@flyinggoat.com> wrote
>CNN article about fossilized sauropod embryos WITH SKIN IMPRESSIONS from
>argentina
>
>http://www.cnn.com/TECH/science/9811/17/dinosaur.embryos.ap/

Here is the abstract of the Nature article

Chiappe L M, Coria R A, Dingus L, Jackson F, Chinsamy A, Fox M, 
Sauropod dinosaur embryos from the Late Cretaceous of Patagonia,
Nature 1998; 396: 258-61

Definitive non-avian dinosaur embryos, those contained inside fossil eggs, are
rare. Here we describe the first known unequivocal embryonic remains of
sauropod dinosaurs - the only known non-avian dinosaur embryos from
Gondwana - from a nesting ground in the Upper Cretaceous stage of
Patagonia, Argentina. At this new site, Auca Mahuevo, thousands of eggs are
distributed over an area greater than 1 km^2. The proportion of eggs
containing embryonic remains is high: over a dozen in situ eggs and nearly 40
egg fragments encasing embryonic material were recovered. In addition to
bone, these specimens contain large patches of fossil skin casts, the first
definitive portions of integument ever reported for a non-avian dinosaur
embryo. As morphology of the eggs enclosing these osseous and
integumentary remains is identical, we propose that these specimens belong
to the same sauropod species. This discovery allows the confident
association of the megaloolithid type of dinosaur eggshell with sauropod
dinosaurs.

Gautam Majumdar                 gautam@majumdar.demon.co.uk