[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Triassic phytosaur and turtle fossils discovered in Greenland (news stories)



Phytosaur remains were also already known in Greenland - see Jenkins et al. (1994) - although their identification was tentative at that time.

Jocelyn

JENKINS, F. A., SHUBIN, N. H., AMARAL, W. W., GATESY, S. M., SCHAFF, C. R., CLEMMENSEN, L. B., DOWNS, W. R., DAVIDSON, A. R., BONDE, N. & OSBAECK, F. 1994. Late Triassic continental vertebrates and depositional environments of the Fleming Fjord Formation, Jameson Land, East Greenland. Meddelelser om Grønland, Geoscience 32, 1–25.

Le 28/07/2012 18:10, Ben Creisler a écrit :
From: Ben Creisler
bcreisler@gmail.com

David Marjanovic  pointed out:

*Proganochelys* has been known from Greenland for decades.

===

My bad from a quick translation. The phytosaur was indeed a first for
Greenland. Rechecking the quote, Mateus did not actually say it was
first turtle from Greenland:

“Qualquer esqueleto descoberto do Triásico [com mais de 200 milhões de
anos] da Gronelândia é importante e uma tartaruga é ainda mais, porque
é uma das mais antigas, o que ajuda a compreender a origem daqueles
animais”, disse Octávio Mateus.


"Any skeleton discovered from the Triassic [more than 200 million
years old] of Greenland is important and a turtle is even more so,
because it's one of the oldest, which helps us understand the origin
of these animals" said Octávio Mateus."

http://www.publico.pt/Ci%C3%AAncias/portugues-descobriu-ossadas-de-dinossauro-na-gronelandia-1556460

The full ref for Proganochelys in Greenland:

Jenkins, F.A. Jr., Shubin, N.H., Amaral, W.W., Gatesy, S.M., Schaff,
C.R., Clemmensen, L.B., downs, W.R., Davidson, A.R., Bonde, N., and
Osbaeck, F. (1994)
Late Triassic continental vertebrates and depositional environments of
the Fleming Fjord Formation, Jameson Land, East Greenland.
Meddelelser om Gronland, Geoscience 32: 1-25.


A diverse assemblage of fossil vertebrates has been discovered in the
Fleming Fjord Formation (Malmros Klint and Orsted Dal Members) in East
Greenland between latitudes 71o15; N and 71o 50'N. The fauna includes
several species of mammals as well as prosauropod (Plateosaurus) and
theropod dinosaurs, turtles (cf. Proganochelys), pterosaurs, aetosaurs
(Aetosaurus ferratus, Paratypothorax andressi), labyrinthodont
amphibians (Gerrothorax, Cyclotosauruss and [possibly other taxa) and
fishes (including sharks, actinopterygians, coelacanths and lungfish).
The association of the genera Aetosaurus, Plateosaurus, Proganochelys,
Cyclotosaurus and Gerrothorax is shared with well known European
Norian faunas, and confirms the paleogeographic proximity of Greenland
and Europe Norian faunas, and confirms the paleogeographic proximity
of Greenland and Europe during Late Triassic time. On this evidence,
the Orsted Dal Member may be estimated to be at least as old as
mid-Norian, but a comparable age estimate for the underlying Malmros
Klint Member cannot be made on the basis of the fauna as presently
known.

The Malmros Klint Member is characterized by composite cyclicity with
four orders of cycles involving silt-rich, ephemeral lack or
playa-mudflat systems, loess beds, wave-reworked sand flats, flat
pebble conglomerates and paleosols. The rhythmicity and thickness
rations of these beds are evidence that depositional conditions were
controlled by Milankovitch cycles, with climatic conditions varying
from humid, to dry with seasonal rainfall, to arid. Cyclical
sedimentary deposition of the overlying Orsted Dal Member.

===
An international team of  paleontologists including Lars B. Clemmensen
from Denmark and Octávio Mateus from Portugual has been looking for
Triassic fossils in Greenland. They have found the bones of at
least two plateosaurs and many tracks, including some that are quite
large (43 cm). In a different area, they discovered a phytosaur, the
first from Greenland. The Portuguese article also mentions discovery
of a fossil turtle, another first for Greenland and one of the
oldest known.

http://www.dr.dk/Nyheder/Indland/2012/07/25/060522.htm

http://www.publico.pt/Ci%C3%AAncias/portugues-descobriu-ossadas-de-dinossauro-na-gronelandia-1556460


--
"As a Professor of Science, I assure you we did in fact evolve from filthy monkey men." Hubert J. Farnworth.