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RE: Labrosaurus (was RE: birds and dinosaurs)

Thomas R. Holtz, Jr. wrote:

In fact, it is almost certainly part of the paratype specimen of _A.
fragilis_!!  (Found in the same quarry, same horizon, is a non-overlapping
element with the specimen, is the right size for the specimen, and that
individual has numerous pathologies running along the left side of the
body).

Bakker, in his "Brontosaur killers" Gaia paper, agrees: the holotype of _L. ferox_ (USNM 2315; a deformed dentary) "fits well" into USNM 4734, the paratype for _A. fragilis_. Both specimens come from the _Allosaurus_ type locality (Garden Park Quarry, Colorado), and possibly pertain to a single individual (according to Bakker).

The holotype of _A. fragilis_ is/was YPM 1930, which comprises a tooth, two centra (dorsal), an incomplete humerus, and a fragment of the third pedal digit.

As I understand it, a neotype has been designated for _A. fragilis_, because the original holotype is so fragmentary and probably non-diagnostic. This neotype is UUVP 6000 (= DINO 2560; skull, caudal vertebra, chevrons, ribs, forelimb and pedal elements), which hails from the Dinosaur National Monument of Utah. I'm not sure if UUVP 6000 is the official neotype (i.e., the ICZN has ruled this to be so), or is the proposed neotype. Does anybody out there know?



Tim

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