[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Psittacosaurus contemporaries
On Wed, 30 Aug 2000 18:59:22 EDT Dinochandler@aol.com writes:
> What dinosaurs are known to inhabit the same area and time as
> especially _P. mongoliensis_?
Well, my sources are a little old, but here I go with the Great
*Psittacosaurus* Contemporaries List of 2000:
(Non-avian) dinosaurs known from the same formations as *P. mongoliensis*
(including *P. guyangensis*, *P. protiguanodonensis*, *P. osborni*, and
Theropods: Theropoda indet.
*Prodeinodon mongoliensis* (indeterminate tooth taxon)
*Harpymimus okladnikovi* (unusual basal
Sauropods: *Asiatosaurus mongoliensis* (indeterminate tooth taxon,
probably similar to *Euhelopus*)
Ornithischians: Ankylosaurid indet.
*Shamosaurus scutatus* (shamosaurine ankylosaurid)
*Sauroplites scutiger* (possibly the same thing as
Iguanodontid indet. (including material similar to
*Altirhinus orientalis* (big-nosed hadrosaur-like
*P. mongoliensis* is known from a number of Chinese and Mongolian
formations, and is usually considered to be upper EK in age; I currently
have it as Barremian-Aptian.
Dinosaurs known from the same formations as *P. mazongshanensis*:
Theropods: *Nanshiungosaurus bohlini* (therizinosaurid)
Sauropods: Sauropoda indet. (including both peg-like and spatulate
Ornithischians: *Siluosaurus zhangqiani* (tiny hypsilophodont)
*Probactrosaurus mazongshanensis* (bulky
*Archaeoceratops oshimai* (tiny ceratopian, more
*P. mazongshanenis* is known only from the Xinminbao Group of China,
which may be ?Aptian-?Albian.
Dinosaurs known from the same formations as *P. meileyingensis*:
Sauropods: Sauropoda indet.
Ornithischians: *Psittacosaurus mongoliensis*
*P. meileyingensis* is known only from the Jiufotang Formation of China,
which has been dated as older than 110+-0.52Ma, making it late Aptian.
Dinosaurs known from the same formations as *P. neimongoliensis* (and *P.
ordosensis* which I suspect is the same thing):
Saurischia: Saurischia indet. (fairly large animal)
Theropods: *Sinornithoides youngi* (troodontid)
Sauropods: *Chiayusaurus* sp. (teeth)
Ornithischians: Stegosaurid indet. (tooth)
*Wuerhosaurus ordosensis* ( large stegosaurid)
*P. neimongoliensis* is known only from the Ejinhoro Formation of China,
possibly Barremian in age.
Dinosaurs known from the same formations as *P. sattayaraki*:
Theropods: Theropoda indet.
*P. sattayaraki* is known only from the Khok Kruat Formation of Thailand,
tentatively dated as ?Aptian-Albian.
Dinosaurs known from the same formations as *P. sinensis* (including *P.
*P. sinensis* is known only from the Qingshan Formation, possibly of
Dinosaurs known from the same formations as *P. xinjiangensis*:
Theropods: *Tugulusaurus faciles* (indet. small theropod, which, if the
description is correct, interestingly has a longer radius than femur)
*Kelmayisaurus petrolicus* (possible ceratosaurid)
*Phaedrolosaurus faciles* (possible dromaeosaurid)
Sauropods: cf. *Asiatosaurus mongoliensis*
Ornithischians: *Wuerhosaurus homheni* (large stegosaurid)
*P. xinjiangensis* is known only from the Lianmugin Formation of China,
dated at ?Valanginian-Albian.
These are all the contemporaries of the named species of *Psittacosaurus*
I could dig up. In addition, there are remains assigned to *P.* sp.,
some of them coming from the middle Barremian-age Yixian Formation, which
was also home to the theropods *Sinornithosaurus millenni*,
*Sinosauropteryx prima*, *Caudipteryx zoui*, *Beipiaosaurus inexpectus*,
*Protarchaeopteryx robusta*, and a number of avian dinosaurs
(*Confuciusiornis* and others). Hope this helps!-*Thescelosaurus*
Justin Tweet, *Thescelosaurus*
See "Thescelosaurus!": http://personal2.stthomas.edu/jstweet/index.htm
YOU'RE PAYING TOO MUCH FOR THE INTERNET!
Juno now offers FREE Internet Access!
Try it today - there's no risk! For your FREE software, visit: