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Maryland Dinosaur Systematics
I am a geology and paleontology student in the Baltimore area. I have been
collecting over the last year and a half or so a loosely associated theropod
from the Arundel Formation of early Cretaceous age. I know that I can avoid
alot of trouble and have someone at the Smithsonian ID it for me but I would
like to give it a try before I do donate my material! I have done extensive
collecting of both flora and fauna at various outcroppings of the Arundel and
have studied voraciously any scientific publications regarding same. To date
, I have an apparant phalanx, including a small claw about 2-3in overall,
three teeth the longest of which is about two inches, part of theropod type
long bone and part of a possible shoulder that may articulate with a humerus
as well as non-descript material that may or may not be part of this
My questions are:
1) Given the paucity of well documented and articulated dinosaur specimens
from the Arundel Fm. in particular and the Potomac Gp. in general, does
anyone know of fairly recent systematic works on theropods from this area?
Some possible genera include Acrocanthosaurus sp., "Dryptosaurus" sp. and
possibly a dromaeosaurid allied with Deinonychus sp.
BTW, I have also collected smaller (Ornithomimid?) teeth and bone fragments,
turtle shell, croccodile scutes and teeth etc. from this same area. Some of
my readings mention similar genera in coeval lithologic units in the West;
i.e Astrodon cf. Pleurocoelus sp. (of which I have several varying sized
teeth of), Tenontosaurus sp., as well as Iguanodontids and Hypsilophodontids
2)Are there any recently published systematic works on these genera from this
area? Should I just try to locate related works on these taxa from our
western colleagues and attempt to compare their results with my material.
I would appreciate any and all references to the above as well as you
personal thoughts on this matter!
Many Thanks in Advance,
Thomas R. Lipka
Paleontological and Geological Studies