[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
RE: Brachytrachelopan mesai [was Short-necked dinosaur challenges accepted theory]
Jaime A. Headden wrote:
My initial comment on the animal is that it's not as "upsetting" of any
theory as it might be touted as in the press, but then that's what gets it
_Nature_ and popularized.... *Isisaurus* also has a fairly short neck, and
likely most saltasaurids were short-necked, given their smaller size may
prevented long-necks from being neccessary in any sense of forage, feeding
Nevertheless, _Brachytrachelopan_ does seem to have an even shorter neck
than these short-necked titanosaurs.
The name is rather confusing in an etymological standpoint: the Mesa
Or "the Mesa family's short-necked shepherd-god".
<Interestingly, the cladogram shows _Amphicoelias_ as a basal diplodocoid -
more basal than _Suuwassea_, rebbachisaurids and dicraeosaurids (like
_Brachytrachelopan_). This must be based on new and undescribed material
Or a reinterpretation of the known material?
Could be - but there is not much to go on if only the type specimens for
_Amphicoelias altus_ and _A. fragillimus_ are used. New (and better)
_Amphicoelias_ is known:
Wilson, J.A. and Smith, M.B. (1996): New remains of Amphicoelias Cope
(Dinosauria: Sauropoda) from the Upper Jurassic of Montana and diplodocoid
phylogeny. J. Vert. Paleont. 16 (3, Suppl.): 73A.