[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
RE: Neuquenraptor argentinus
Wow, Nature is out early today!
Yes, Neuquenraptor argentinus (the taxon formerly called "Araucanoraptor" on
the list) is now published. It is an apparently fully
arctometatarsalian dromaeosaurid, although the proximal end of the metatarsus
isn't known. No, it doesn't seem to be a troodontid!
Other than the fully pinched mtIII, the anatomical details and relative
proportions of the foot support it as a probable
dromaeosaurid. Material consists of fragments of cervical vertebra, dorsal
ribs, haemal arches, left proximal radius, right femur
and distal tibia, proximal tarsals, and most of the foot of the left hindlimb,
found while digging up the ribcage of a titanosaur.
In their analysis it falls out in a basal polytomy with Unenlagia,
Sinornithosaurus, Microraptor, and a clade comprised of
Dromaeosaurinae (Dromaeosaurus, Utahraptor, Achillobator, and Adasaurus) and
Velociraptorinae (Velociraptor, Deinonychus, and the
Ukhaa dromaeo). They note that the dromaeosaurine-velociraptorine group does
seem to be a strictly Laurasian clade, but that
Dromaeosauridae as a whole is cosmopolitan.
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
Building 237, Room 1117
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796