Ben Creisler | 30 Aug 20:31 2014
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Tyrannosaur play + "hypsilophodont" "setigerous scales" + other papers

Ben Creisler
bcreisler <at> gmail.com

A number of recent papers (dino and non-dino) not yet mentioned:

Bruce M. Rothschild (2014)
Unexpected behavior in the Cretaceous: tooth-marked bones attributable
to tyrannosaur play.
Ethology Ecology & Evolution (advance online publication)
DOI:10.1080/03949370.2014.928655
http://www.tandfonline.com/doi/full/10.1080/03949370.2014.928655#.VAH5z_ldXTo

Intro:
Attributing behavior in extinct animals is predicated on
identification of anatomy or pathology analogous to that present and
recognized in contemporary animals (Rothschild & Martin 2006). While
Tanke & Currie (1998) noted the difficulty of directly recognizing
dinosaur behavior, one approach is to examine biotic-derived
environmental alternations. For the analysis of utilization of
potential dietary components by theropod dinosaurs, this means
examining the damage they produced in manipulation of carcasses or
bony components thereof. Application of deductive reasoning to tooth
marks on isolated dinosaur bones and fragments excludes the usual
suspects (scavenging and predation), leaving attribution to a behavior
not previously considered. The pattern of bite marks in isolated
bones, and especially in isolated ceratopsian occipital condyles, is
incompatible with feeding activities, but is characteristic of that
found with play by contemporary animals. Deductive reasoning leads to
an alternative explanation to feeding behaviors for isolated,
tooth-marked bones: Tyrannosaurids played with those bones.
(Continue reading)

Ben Creisler | 29 Aug 05:18 2014
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Dystrophaeus dig project in Utah (news video)

Ben Creisler
bcreisler <at> gmail.com

Dystrophaeus project news story (video)

http://fox13now.com/2014/08/28/skeleton-of-dinosaur-first-unearthed-155-years-ago-now-being-excavated/

https://www.facebook.com/Dystrophaeus

Ben Creisler | 28 Aug 18:44 2014
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Dinosaur hotel in Denver + Montana high schoolers dig dinosaurs + other news

Ben Creisler
bcreisler <at> gmail.com

A number of recent news items:

Dinosaur hotel in Denver preview visit

http://boingboing.net/2014/08/28/an-exclusive-inside-look-at-de.html

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High schoolers in Montana dig up last of the dinosaurs

http://www.gasconadecountyrepublican.com/news/owensville/article_51d16e4a-2df2-11e4-9f38-0017a43b2370.html

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Finding more dinosaur tracks in British Columbia

http://tumblerridgenews.com/?p=13762

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Pterosaur tooth found in 180-million-year-old Jurassic site in Germany
(in German)

http://www.haz.de/Nachrichten/Wissen/Uebersicht/Flugdinosaurierzahn-bei-Wolfenbuettel-entdeckt

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Dinosaur tracks in Sonora, Mexico (in Spanish)

(Continue reading)

Ben Creisler | 28 Aug 17:43 2014
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Funiusaurus, new lizard from Upper Cretaceous of Henan, China

Ben Creisler
bcreisler <at> gmail.com

A new paper:

Li XU, Xiaochun WU, LÜ Junchang, Songhai JIA, Jiming ZHANG, Hanyong
PU, and Xingliao ZHANG (2014)
A New Lizard (Lepidosauria: Squamata) from the Upper Cretaceous of Henan, China.
Acta Geologica Sinica - English Edition 88(4): 1041–1050
DOI: 10.1111/1755-6724.12271
http://onlinelibrary.wiley.com/doi/10.1111/1755-6724.12271/abstract

Funiusaurus luanchuanensis gen. et sp. nov. was described on the basis
of an incomplete skull from the Upper Cretaceous Qiupa Formation of
the Tantou Basin in Luanchuan County, Henan Province. It is the second
representative of lizards known from Luanchuan and adds a new member
to the Luanchuan Fauna. F. luanchuanensis is a small-sized lizard and
systematically assigned to the Polyglyphanodontidae of the Teiioidea
because of the presence of a caniniform tooth and an elongate
posterior process of the postorbital. It is distinctive in that the
heterodont dentition bears 19 teeth in both the upper and lower jaws,
the 3rd maxillary tooth is large and caniniform, the post-caniniform
teeth in maxilla and those posterior to the 3rd dentary tooth are
chisel-like in lateral view, the prefrontal possesses a fossa on its
lateral surface, the postorbital with an extremely elongate posterior
process and the well-developed retroarticular process has a deep fossa
on its dorsal surface. In phylogeny, our analysis suggests a close
relationship of Funiusaurus to the large-sized Tianyusaurus from the
same basin within the Tuberocephalosaurinae. The discovery of
Funiusaurus is significant in confirming the status of the
(Continue reading)

Ben Creisler | 28 Aug 17:38 2014
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Large ankylosaur from Lower Cretaceous of Liaoning, China.

Ben Creisler
bcreisler <at> gmail.com

A new paper:

Shu-an JI, Lijun ZHANG, Shudong ZHANG, Lijun ZHANG, and Shan HANG (2014)
Large-Sized Ankylosaur (Dinosauria) from the Lower Cretaceous
Jiufotang Formation of Western Liaoning, China.
Acta Geologica Sinica - English Edition 88(4): 1060–1065
DOI: 10.1111/1755-6724.12273
http://onlinelibrary.wiley.com/doi/10.1111/1755-6724.12273/abstract

Two incomplete bones referred to ankylosaur scapulocoracoid and
humerus are described, which were discovered from the Early Cretaceous
Jiufotang Formation of Dachengzi Town, Kazuo County, Liaoning
Province. Ankylosaur dinosaurs have ever been found in the Lower
Cretaceous Yixian, Fuxin and Sunjiawan Formations of western Liaoning.
The occurrence of ankylosaurs within Jiufotang Formation improves our
knowledge on the ankylosaur stratigraphic distribution. Based on the
length of scapulocoracoid, the new dinosaur is estimated to exceed 6.0
meters long, representing the largest ankylosaur in western Liaoning.

NOTE: This paper has not been posted yet on the Chinese open-access link.

http://www.geojournals.cn/dzxben/ch/index.aspx

Ben Creisler | 28 Aug 17:34 2014
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Grabauornis, new bird (Enantiornithes) from Early Cretaceous of China

Ben Creisler
bcreisler <at> gmail.com

A new paper:

Johan DALSÄTT, Per G.P. ERICSON and Zhonge ZHOU (2014)
A New Enantiornithes (Aves) from the Early Cretaceous of China.
Acta Geologica Sinica - English Edition 88(4): 1034–1040
DOI: 10.1111/1755-6724.12270
http://onlinelibrary.wiley.com/doi/10.1111/1755-6724.12270/abstract

A new bird from the early Cretaceous Yixian Formation of Liaoning,
China is described. This new species, Grabauornis lingyuanensis,
shares several synapomorphies with the Enantiornithes. The specimen is
relatively well preserved. The skeletal morphology of Grabauornis
bears close resemblance to that of other Chinese members of this
clade. The brachial index (the ratio between the lengths of humerus
and ulna) is 0.95, which is close to the average for enantiornithine
birds. It indicates that Grabauornis was a rather good flyer, and the
presence of an alula in the wing further testifies to this.

NOTE: This paper has not been posted yet on the Chinese open-access link.

http://www.geojournals.cn/dzxben/ch/index.aspx

Ben Creisler | 28 Aug 17:27 2014
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Datanglong, new theropod (Carcharodontosauria) from Lower Cretaceous of China

Ben Creisler
bcreisler <at> gmail.com

A new paper:

Jinyou MO, Fusheng ZHOU, Guangning LI, Zhen HUANG, and Chenyun CAO (2014)
A New Carcharodontosauria (Theropoda) from the Early Cretaceous of
Guangxi, Southern China.
Acta Geologica Sinica - English Edition 88(4): 1051–1059
DOI: 10.1111/1755-6724.12272
http://onlinelibrary.wiley.com/doi/10.1111/1755-6724.12272/abstract

A new large-bodied theropod dinosaur, Datanglong guangxiensis gen. et
sp. nov., was recovered from the Lower Cretaceous Xinlong Formation of
the Datang Basin, Guangxi. It is unique in several features including:
posteriormost dorsal vertebra with teardrop-shaped pneumatic foramen
confined by enlarged pcdl, acpl and the centrum; posteriormost dorsal
with well-developed, horizontal prpl; posteriormost dorsal with a
parapophysis projecting more laterally than the diapophysis; brevis
fossa shallow with short, ridge-like medial blade; and iliac pubic
peduncle with posteroventrally expanded margin. Cladistic analysis
supports the idea that this new taxon Datanglong guangxiensis is a
primitive member of the Carcharodontosauria in possessing two
unambiguous synapomorphies: large external pneumatic foramina and
internal spaces present in the lateral surface of ilium, and a
peg-and-socket ischiac articulation with the ilium. The presence of
the new taxon from Guangxi further confirms that Carcharodontosauria
were cosmopolitan large-bodied predators during the Early-mid
Cretaceous.

(Continue reading)

Ben Creisler | 28 Aug 05:03 2014
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Dinosaur tracks from Lower Cretaceous of Sichuan Province, China

Ben Creisler
bcreisler <at> gmail.com

A new online paper:

Lida Xing, Martin G. Lockley, Jianping Zhang, Hendrik Klein, W. Scott
Persons IV & Hui Dai (2014)
Diverse sauropod-, theropod-, and ornithopod-track assemblages and a
new ichnotaxon Siamopodus xui ichnosp. nov. from the Feitianshan
Formation, Lower Cretaceous of Sichuan Province, southwest China.
Palaeogeography, Palaeoclimatology, Palaeoecology (advance online publication)
DOI: 10.1016/j.palaeo.2014.08.011
http://www.sciencedirect.com/science/article/pii/S0031018214004088

Highlights
More than 1000 tracks have been observed in the Zhaojue tracksites.
Diverse sauropod-, theropod-, and ornithopod-track assemblages.
One theropod trackway attributed to the new ichnospecies Siamopodus xui.
Titanosaurian sauropods were abundant from the Cretaceous Sichuan Basin.

Abstract
Copper mining activities in a huge quarry in the fluvial-lacustrine
Lower Cretaceous Feitianshan Formation near Zhaojue, Sichuan Province
have temporarily exposed large track-bearing surfaces that require
rapid documentation before they are subject to erosion or damage from
collapseor destruction by mining. Due to the urgent need to document
these sites several preliminary studies of representative material
have been completed, and more than 1000 tracks have been observed.
Here we present maps of two large surfaces, with a combined area of ~
1000 m2, representing the same stratigraphic level, and yielding
(Continue reading)

Ben Creisler | 27 Aug 22:51 2014
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Acrocanthosaurus and Sauroposeiden tracks found in Texas + other news

Ben Creisler
bcreisler <at> gmail.com

A number of recent news and blog items:

More Acrocanthosaurus and Sauroposeidon tracks found in Texas (with
photo gallery)

http://www.mysanantonio.com/news/local/article/Dinosaur-tracks-discovered-in-Bexar-County-5716070.php

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Drones map Alberta dinosaur beds

http://www.cbc.ca/news/canada/calgary/drones-flying-over-alberta-badlands-to-map-dinosaur-beds-1.2748504

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Psittacosaurus "nursery" study

http://www.upenn.edu/pennnews/news/penn-paleontologists-describe-possible-dinosaur-nest-and-young-babysitter

http://phys.org/news/2014-08-paleontologists-dinosaur-young-babysitter.html

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Zofia Kielan-Jaworowska profile

http://trowelblazers.com/zofia-kielan-jaworowska/

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Lower Triassic tracks in Germany (in German)
(Continue reading)

Ben Creisler | 27 Aug 19:25 2014
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Origin of tetrapods from study of modern walking fish

Ben Creisler
bcreisler <at> gmail.com

Online in Nature:

Emily M. Standen, Trina Y. Du & Hans C. E. Larsson (2014)
Developmental plasticity and the origin of tetrapods.
Nature (advance online publication)
doi:10.1038/nature13708
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13708.html

The origin of tetrapods from their fish antecedents, approximately 400
million years ago, was coupled with the origin of terrestrial
locomotion and the evolution of supporting limbs. Polypterus is a
member of the basal-most group of ray-finned fish (actinopterygians)
and has many plesiomorphic morphologies that are comparable to
elpistostegid fishes, which are stem tetrapods. Polypterus therefore
serves as an extant analogue of stem tetrapods, allowing us to examine
how developmental plasticity affects the ‘terrestrialization’ of fish.
We measured the developmental plasticity of anatomical and
biomechanical responses in Polypterus reared on land. Here we show the
remarkable correspondence between the environmentally induced
phenotypes of terrestrialized Polypterus and the ancient anatomical
changes in stem tetrapods, and we provide insight into stem tetrapod
behavioural evolution. Our results raise the possibility that
environmentally induced developmental plasticity facilitated the
origin of the terrestrial traits that led to tetrapods.

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(Continue reading)

Ben Creisler | 27 Aug 05:17 2014
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Earliest placental mammals + Utah dinosaur highlights + other news

Ben Creisler
bcreisler <at> gmail.com

A number of recent news story:

Does speeded up evolution explain when placental mammals evolved?

http://www.abc.net.au/science/articles/2014/08/27/4074829.htm

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Montana dinosaur egg to get high tech scan from synchrotron particle
collider in UK

http://www.foxnews.com/science/2014/08/26/technology-could-reveal-70-million-year-old-dinosaur-egg-secrets/?

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Where to see dinosaurs in Utah

http://www.deseretnews.com/article/865609617/Where-to-see-dinosaurs-in-Utah.html

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Student looks for dinosaurs in Utah

http://www.upenn.edu/pennnews/news/penn-s-tanner-frank-dinosaur-digs-utah-offer-desk-job-alternative

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(Continue reading)


Gmane