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It's A Wonderful New Papers
Happy Solstice, All! Were I sending out cards, they'd be these:
http://tinyurl.com/2c3su2. Consider yourself on the recipient list!
Zheng, X., Zhang, Z., and Hou, L. 2007. A new enantiornithine bird with four
long rectrices from the Early Cretaceous of northern Hebei, China. Acta
Geologica Sinica (English Edition) 81(5): 703-708.
Introduces _Paraprotopteryx gracilis_.
Lu, J., Gao, Y., Xing, L., Li, Z., and Ji, Q. 2007. A new species of
Huaxiapterus (Pterosauria: Tapejaridae) from the Early Cretaceous of western
Liaoning, China. Acta Geologica Sinica (English Edition) 81(5): 693-687.
Introduces _H. benxiensis_.
Unfortunately, I do not have PDFs of these two, yet.
Wang, X., You, H., Meng, Q., Gao, C., Chang, X., and Liu, J. 2007.
Dongbeititan dongi, the first sauropod dinosaur from the Lower Cretaceous
Jehol Group of western Liaoning Province, China. Acta Geologica Sinica
(English Edition) 81(6):911-916.
ABSTRACT: We herein describe a partial postcranial skeleton of a sauropod
dinosaur recovered from the Lower Cretaceous Jehol Group in the Beipiao area
of western Liaoning Province, northeastern China. A suite of features it
possesses, including the camellate internal structure of its presacral
elements, the existence of pneumatocoels on the proximal ends of the dorsal
ribs, and especially the medially deflected proximal portion of the femur,
definitively establish the titanosauriform affinities of the specimen. It
differs from other titanosauriforms in having a craniocaudally elongate
coracoid with a squared cranioventral extreme and a long, smooth, and
slightly convex acetabular edge of the pubis. It represents a new taxon,
Dongbeititan dongi gen. et sp. nov. Comparative studies suggest that
Dongbeititan is a basal titanosauriform, more derived than Euhelopus,
Fusuisaurus, and Huanghetitan, but less derived than Gobititan and
Jiutaisaurus. Dongbeititan represents the first sauropod dinosaur reported
from the Lower Cretaceous Jehol Group of western Liaoning Province.
You, H., Tanoue, K., and Dodson, P. 2007. A new specimen of Liaoceratops
yanzigouensis (Dinosauria: Neoceratopsia) from the Early Cretaceous of
Liaoning Province, China. Acta Geologica Sinica (English Edition)
ABSTRACT: A new specimen of basal neoceratopsian dinosaur Liaoceratops
yanzigouensis is described. The specimen comes from the Lujiatun Bed of the
Lower Cretaceous Yixian Formation in Beipiao City of western Liaoning
Province, and is represented by a very well preserved three-dimensional
partial skull and mandible. It is also the smallest among the three
specimens of L. yanzigouensis, and several features in the new specimen,
such as the short preorbital length and the round rostroventral orbital rim,
can be ontogenetically-related. The superb exposure of the palatal complex
may be caused by the removing of its brain by a small predator in the
contemporary Jehol Biota.
Nobre, P.H., de Souza Carvalho, I., de Vasconcellos, F.M., and Souto, P.R.
2008. Feeding behavior of the Gondwanic Crocodylomorpha Mariliasuchus
amarali from the Upper Cretaceous Bauru Basin, Brazil. Gondwana Research
13(1):139-145. doi: 10.1016/j.gr.2007.08.002.
ABSTRACT: Mariliasuchus amarali Carvalho and Bertini, 1999 is a Cretaceous
Crocodylomorpha (Notosuchia) from the Bauru Basin, Brazil. The feeding
behavior of M. amarali is analysed and interpreted based on the
articular-quadrate articulation, pattern of teeth occlusion and the chemical
composition of coprolites. The articulation between the articular and
quadrate bones and the teeth abrasion pattern allow to infer that this
notosuchian probably moved the jaw antero-posteriorly, processing the food
before swallowing it. M. amarali should have kept the food inside the oral
cavity during the feeding process, increasing the effectiveness of
mastication. The post-caniniform tooth row is medially displaced in relation
to the skull, suggesting the presence of a large conjunctive tissue. The
structure and shape of the anterior caniniform and incisiform teeth exclude
the possibility of an entirely herbivorous diet. Based on the morphological
data and on the physical and chemical analyses of coprolites, it is
interpreted that it had omnivorous feeding habits. The shape and abrasion
pattern of the incisiform teeth suggest that Mariliasuchus employed the
prominent anterior incisiform teeth for an active digging behavior.
Clarke, A., and Rothery, P. 2007. Scaling of body temperature in mammals and
birds. Functional Ecology. doi: 10.1111/j.1365-2435.2007.01341.x.
ABSTRACT: 1. We examine variation associated with phylogeny in the scaling
of body temperature in endotherms, using data from 596 species of mammal and
490 species of bird.
2. Among higher groups of mammals there is statistically significant
scaling of body temperature with mass in Marsupialia (positive), Ferae and
Ungulata (both negative). In mammalian orders where data are available for
at least 10 species, scaling is negative in three orders (Carnivora,
Erinaceomorpha and Artiodactyla), positive in one (Chiroptera) and not
significant in seven others. There is no relationship apparent between the
scaling of body temperature and the existence of gut fermentation. As
expected, monotremes exhibit the lowest body temperatures, but within
marsupials diprotodonts have a mean body temperature higher than several
placental groups; the traditional ranking of body temperatures in the
sequence monotremes - marsupials - placentals is thus misleading.
3. In birds, scaling relationships are significant only for Ciconiiformes
(strongly negative) and Passeriformes (weakly positive).
4. When allowance is made for phylogenetic effects, there is no significant
relationship between temperature in body mass in mammals overall, but an
inverse and almost significant relationship in birds.
5. This study indicates a complex relationship between body mass, body
temperature and metabolic rate in mammals and birds, mediated through
Jerry D. Harris
Director of Paleontology
Dixie State College
225 South 700 East
St. George, UT 84770 USA
Phone: (435) 652-7758
Fax: (435) 656-4022
"There's a saying that goes 'people who live in glass houses shouldn't throw
stones'... OK. How about...NOBODY should throw stones. That's crappy
behavior! My policy is 'no stone-throwing regardless of housing situation.'
There's an exception, though. If you're TRAPPED in a glass house...and you
have a stone, then throw it! What are you, an idiot? It's really 'ONLY
people in glass houses should throw stones'... provided they're trapped, in
a house... with a stone. It's a little longer, but you know..."
--- Demetri Martin