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Re: Phytosaurs from Greenland (news)



Ben Creisler
bcreisler@gmail.com


The SVP poster can be seen here:

http://lusodinos.blogspot.com/2014/11/o-triasico-de-jameson-land-revisitado.html

On Mon, Nov 10, 2014 at 11:23 AM, Ben Creisler <bcreisler@gmail.com> wrote:
> For some reason, this item does not want to post to the DML despite
> multiple tries...
>
> ---------- Forwarded message ----------
> From: Ben Creisler <bcreisler@gmail.com>
> Date: Mon, Nov 10, 2014 at 10:48 AM
> Subject: Phytosaurs from Greenland (news)
> To: dinosaur@usc.edu
>
>
> Ben Creisler
> bcreisler@gmail.com
>
>
> From a blocked earlier posting to the DML.
>
> Phytosaurs (two adults, a juvenile and a baby) from Triassic of
> Greenland with video  (in Portuguese)
>
> http://observador.pt/2014/11/05/eram-assim-os-crocodilos-da-gronelandia/
>
> From SVP meeting:
>
> THE LATE TRIASSIC OF JAMESON LAND REVISITED: NEW VERTEBRATE FINDINGS
> AND THE FIRST PHYTOSAUR FROM GREENLAND
> MATEUS, Octávio ; CLEMMENSEN, Lars ; KLEIN, Nicole ; WINGS, Oliver ;
> FROBØSE, Nicolaij; MILÀN, Jesper ; ADOLFSSEN, Jan Schulz ; ESTRUP,
> Eliza
>
> SVP Poster 2014
>
> An expedition to Jameson Land (East Greenland) was conducted in July
> of 2012, involving twelve researchers and technicians from Denmark,
> Germany, and Portugal. The fieldwork focused on two sites:
> Lepidopteris Elv and Macknight Bjerg, both within the Norian-Rhaetian
> Malmros Klint and Ørsted Dal Members of the Fleming Fjord Formation.
> One of the main findings include partial phytosaur skeletons at
> Lepidopteris Elv (middle Malmros Klint Mb, ~211-210 Ma, Norian),
> including well preserved cranial and postcranial elements.
> Disarticulated skull material includes the mandible, jugals,
> postorbital, angular and quadrate. Many axial and appendicular bones
> were collected. Considering size ranges and duplication of bones, the
> phytosaur material pertains to at least to four individuals and three
> size ranges. Most bones are adult size with an estimated body length
> of about 3.8 m, including three identical humeri of the same size (two
> left and one right side, between 255 and 264 mm) that provide evidence
> for at least two individuals. Three complete dorsal neural arches and
> one centrum, all with unfused open neurocentral sutures, and an
> anterior part of a dentary about 63 mm long show the additional
> presence of an animal with 1-2 m body length. The third and smallest
> body size is deduced from a complete left scapula only 34 mm in
> length, corresponding to a body length of 45 to 55 cm. This totals
> four individuals. These are the first well documented phytosaurs in
> Greenland because bones of previous expeditions belong to
> temnospondyls.
>
> The prosauropod Plateosaurus site found in the 1990s at Macknight
> Bjerg (top of Malmros Klint Mb) was excavated. The number of bones and
> their relative size indicate that more than one individual and body
> size is present. A new basal Testudinata specimen, very fragmented due
> to solifluction, was also collected at Macknight Bjerg (Ørsted Dal
> Mb). The suture pattern of the carapace shows a basal condition and
> cf. Proganochelys was previously documented to the area.
>
> Numerous theropod tracks were revisited and additional tracks were
> found: cheirotherid tracks at Lepidopteris Elv (Ørsted Dal Mb)and
> large sauropod and prosauropod tracks in outcrops near Macknight
> Bjerg. A new locality, ″Burned Paper-Shale site″, at the base of the
> Rhaetian Kap Stewart Fm yielded numerous coprolites, shark remains,
> and temnospondyls. The faunal list is similar to fossil localities in
> Central Europe and may indicate the typical vertebrate assemblage in a
> stable Late Triassic terrestrial ecosystem.
>
> =======
>
> Tetrapod Zoology blog also has a new 2-part series on phytosaurs:
>
> http://blogs.scientificamerican.com/tetrapod-zoology/2014/11/04/phytosaurs-part-i/
>
> http://blogs.scientificamerican.com/tetrapod-zoology/2014/11/08/phytosaurs-part-ii/