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new paper on dino evolution
Just came from the library, where there is a new (to me, anyway) paper on
dinosaur evolution by Paul Sereno:
Sereno, P.C. 1997. The origin and evolution of dinosaurs. Annual Review
of Earth and Planetary Sciences 1997:435-489.
For those who were at SVP 1996, many of the new phylogenies he showed there
are to be found in this review paper (but no data matrix, dammit!!).
I haven't finished reading it yet, but here are some quick comments and
New taxonomic names:
Cerapoda has been replaced with Neornithischia. Don't know if this is a
correction (perhaps the name was occupied?) or if this is simply the node
for which the stem-based group is Cerapoda.
Hadrosauriformes for Iguanodontidae + Hadrosauridae.
Macronaria (clade containing Haplocanthosaurus, Camarasaurus,
Brachiosauridae, and Titanosauria) is finally published, but listed as
coming from the soon-to-be published Wilson and Sereno sauropod phylogeny.
A new theropod clade name, Paraves, for Deinonychosauria + Aves. (Dammit,
there is a paper in review with a different name for the same clade. Ah,
well, c'est la taxonomie!).
[Actually, there is a typo in the classification table: Paraves is listed as
coming from Wilson & Sereno, and Macronaria as simply a new taxon to this
Corrected taxonomic names:
Nodosaurinae and Pachycephalosaurinae (corrections for the
taxonomically-improper Panoplosaurinae and Domocephalinae in Sereno's 1986
Figure 5 is quite nice: it illustrates the known position of the acquisition
of typical "avian" features throughout theropod history. Figure 7 does the
same for herbivorous adaptations in ornithischian history.
I'll post additional comments after I get done reading it.
Take care, all.
Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:email@example.com
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661