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The new issue of Journal of Vertabrate Paleontology arrived yesterday.  It's 
full of fun dinosaur related articles, and in part I think makes up for the 
dinosaur-soft SVP meeting in Denver.

And for those of you who may have been curious if I am still alive, I am... 
just a little weary after a month of martial law, teargassing, rubber bullets 
and nitroglycerine importers :-)

Now, here are the dino-related articles in the order they appear in JVP:

Wilson, J A.  1999.  A nomenclature for vertebral laminae in sauropods and 
other saurischian dinosaurs.  JVP 19(4):639-653.

Curry, K A.  Ontogenetic histology of _Apatosaurus_ (Dinosauria: Sauropod): 
New insights on growth rates and longevity.  JVP 19(4):654-665.

Christiansen, P.  1999.  Long bone scaling and limb posture in non-avian 
theropods: Evidence for differential allometry.  JVP 19(4):666-680.

Zhao X, Cheng Zh, and Xu X.  1999.  The earliest ceratopsian from the 
Tuchengzi Formation of Liaoning, China.  JVP 19(4):681-691.

Penkalski, P and Dodson, P.  1999.  The morphology and systematics of 
_Avaceratops_, a primitve horned dinosaur from the Judith River Formation 
(Late Campanian) of Montana, with the description of a second skull.  JVP 

Schweitzer, M H, Watt, J A, Avci, R, Forster, C A, Krause, D W, Knapp, L, 
Rogers, R R, Beech, I, and Marshall, M.  1999.  Keratin immunoreactivity in 
the Late Cretaceous bird _Rahonavis ostromi_.  JVP 19(4):712-722.

Barrett, P M.  1999.  A sauropod dinosaur from the Lower Lufeng Formation 
(Lower Jurassic) of Yunnan Province, People's Republic of China.  JVP 

Sereno, P C.  1999.  A rationale for dinosaurian taxonomy.  JVP 19(4):788-790.

So ya... a buttload of dino papers.  The Zhao et al paper describes and names 
officially the much talked about, little understood, _Chaoyangsaurus youngi_. 
 This is just about the coolest animal to come out of the Ornithischia in the 
25 years hands down.

The skull has most of the face preserved and all the tooth rows.  There is a 
rostral bone, making it a ceratopian, but there are two very large premax 
teeth, and there seems to be a premax-max notch, but the drawing is kinda 
fuzzy in that area, and the photo looks like it has matrix there.

The authors made a cladogram and it comes out at the base of an unresolved 
trichotemy within the Ceratopia, the other two brancges being 
_Psittacosaurus_ and Neoceratopia.

Speaking of new cladograms....  Penkalski and Dodson describe what appears to 
be a new skull of _Avaceratops_ and use info from both specimens to generate 
a cladogram that places _Avaceratops_ outside of Chasmosaurinae + 
Centrosaurinae.  They also move the Ceratopidae down to the node joining all 
three :-P instead of ={Chasmosaurus + Centrosaurus} like everyone else has it 
(Jon Wagner I am sure is already pulling out his hair).

Pete Buchholz

Ask anyone: you can trust Dwayne Hoover.