New Refs. vs Supl. Info on Shuvuuia

["Alessandro Marisa" <amaris@tin.it>]

Dear list-members,
for all the Ceratopsian fun, I want to point out that in the October 2001
issue
of "Canadian Journal Earth of Science" there is a Dinosaur paper in which is
described a new species of  Chasmosaurus, Chasmosaurus irvinensis sp. nov.
The new  species is know from three more or less complete skull found in the
Dinosaur Provincial Park Formation, Alberta.
Chasmosaurus irvinensis is distinguished from the others Chasmosaurus's
species by the possession of a broad snout, absence of a brow  horn, broadly
rounded and open jugal notch, subrectangular squamosal, straight posterior
parietal bar bearing 10 epoccipitals, eight of which are flattened, strongly
curved anterodorsally, and nearly indistinguishably coossified to their
neighbours, and small, transversely oriented parietal fenestrae restricted
to the posterior posrtion of the frill.
The phylogenetic analysis show that Chasmosaurus irvinensis is more closely
related to the others Canadian species of Chasmosaurus (Chasmosaurus belli
and Chasmosaurus russelli) than to Chasmosaurus mariscalensis from Texas.
In regard to Shuvuuia, I'm very grateful if someone could send me the
supplemental information
added to the Shuvuuia deserti paper "The skull of a relative of the
stem-group bird Mononykus" published in "Nature" by Chiappe,
Norell & Clarke in 1997.
Always in regard to Alvarezsauria, in 1997 paper on Patagonykus puertai Dr.
Novas mentioned that in the same locality where was found Patagonykus
puertai there was a fragmentary vertebra  (tentatively assigned to the 5th?
cervical vertebra) which shares some apomorphic similarities with the
cervicals of Mononykus olecranus and Alvarezsaurus calvoi  (es. cranial
articular surface distintctly set off dorsally with respect to the remaining
cranial surface of the centrum, centrum strongly compressed transversely,
and presence of epipophyses cranially placed with respect to the caudal
margin of the postzygapophyses), this vertebra was tentatively assigned to
Alvarezsauridae, but Dr. Novas write that in view of the centrum
craniocaudally shorter and dorsoventrally deeper than in Alvarezsaurus
calvoi and Mononykus olecranus it could be an additional species of
Alvarezsauridae.
A part for the smaller size could this vertebra pertain to Patagonykus? If
not, what's the actual assignment of this material?

By and thanks
____________________________________________
Marisa Alessandro
"Volounteer of Museo Paleontologico Cittadino, Monfalcone"
Via Achille Grandi n°18
38068 ROVERETO (TN) ITALY
Tel:039-0464-434658 Email amaris@tin.it
Museum Web-Page: http://www.fante.speleo.it
____________________________________________