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Here is the Einiosaurus stuff. Once again, criticize anything,
suggest anything (particularly regarding taxonomy) HURT ME BEAT ME USE ME!!
One little question I asked before: in the Horner, Varrichio, and Goodwin
paper in Nature ("Marine transgressions and the evolutuion of Cretaceous
dinosaurs"), Einiosaurus and Achelousaurus are described as "transitional taxa
B & C". Transitional taxa A is a form "identical to Styracosaurus except that
it posseses only one pair of parietal spikes" like Einiosaurus and
Achelousaurus. I've never heared of this thing. Has it been described?
Also, any additional publication references would be appreciated.
"Remember the time you laughed so hard at your own joke that you snorted
and inhaled at the same time? Then you choked on your own spit and fell
over and bonked your head on the coffee table."
"I'm ignoring you."
"Who says your life is boring?"
GENUS: _Einiosaurus_ (Sampson,1995b)
_Einiosaurus_ _procurvicornis_ (Sampson, 1995b)
Etymology: Blackfoot Indian eini ("bison")*2 + Greek sauros ("lizard")
Latin pro ("forward") + curvus ("curve") + Greek cornu ("horn")
Synonyms: "_Styracosaurs_ makaeli_"*1
Holotype: MOR 456-8-9-6-1
Referred specimens: MOR 373 (includes multiple specimens), MOR 456 (includes
Formation & location: Two Medicine Formation,
Montana, United States
Age: Late Campanian
CERATOPSIA Marsh, 1890
CERATOPSIDAE Marsh, 1888
CENTROSAURINAE Lambe, 1915
Sampson (1995b) considers _E_._procurvicornis_ to be a taxa with
close ties with _Achelousaurus_ and _Pachyrhinosaurus_, while Horner et all
(1992) postulate it was a direct intermediate between a _Styracosaurus_-like
form and _Achelousaurus_.
Estimated adult skull length: ~1.5 m
_Einiosaurus_ _procurvicornis_ is characterized by its unusual nasal
horn, which curves forward in a manner similar to a bottle opener. Some
individuals have smaller and more erect horns, a difference which may be
due to sexual dimorphism. The supraorbital horn cores vary considerably in
morphology from low, rounded masses to pitted surfaces. _E_. _procurvicornis_
also posseses a single pair of parietal spikes, a character it shares with
_Achelousaurus_. _Einiosaurus_ was an average sized centrosaur for its time.
*1: Dinosaurs: A Global Veiw has a Douglas Henderson restoration of two
dead floating Einiosaurus labelled "Styracosaurus makaeli". Where did
this name come from? was it just cooked up for the book, or is it
elsewhere in the published litterature?
*2: I have recently been informed that all the North American critters we
call "buffalo" are technically bison, and that there have never been true
buffalo in North America. If this is B.S., let me know.
*3: My understanding is that multiple individuals were grouped under a
single specimen numebnr. Why was this done?
*4 (PUBLICATIONS): Can someone find out the volume of this one?
Horner, J.R., Varricchio, D.J., Goodwin, M.B. 1992. Marine
transgressions and the evolution of Cretaceous dinosaurs. Nature
Morell, V. 1987. Announcing the birth of a heresy. Discover (March):26-50.
Rogers, R.R. 1990. Taphonomy of three dinosaur bone beds in the Upper
Cretaceous Two Medicine Formation of northwestern Montana: evidence
for drought related mortality. Palios 5:394-413.
Sampson, S.D. 1995a. Horns, herds, and heiarchies. Natural History
Sampson, S.D. 1995b. Two new horned dinosaurs from the Upper Cretaceous
Two Medicine Formation of Montana; with a phylogenetic analysis of the
Centrosaurinae (Ornithischia: Ceratopsidae). Journal of Vertebrate