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Herpetofauna of Early Triassic Donskaya Luka, Russia + Weigeltisaurus valid + Triassic footprints in Catalan Basin



Ben Creisler
bcreisler@gmail.com


Recent papers:


A. G. Sennikov (2015)
New data on the herpetofauna of the Early Triassic Donskaya Luka
locality, Volgograd Region.
Paleontological Journal 49(11): 1161-1173
DOI: 10.1134/S0031030115110088
http://link.springer.com/article/10.1134/S0031030115110088


New material of Early Triassic prolacertilians and eosauropterygians
from the Donskaya Luka locality is described. New data on the
morphology and functional morphology of these reptile groups are
provided; their taxonomy, phylogeny, and lifestyle are discussed.


Keywords
Tanystropheidae Cymatosauridae tetrapods sauropterygians locomotion
systematics phylogeny Lower Triassic Volgograd Region Donskaya Luka


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V. V. Bulanov &  A. G. Sennikov (2015)
Substantiation of validity of the Late Permian genus Weigeltisaurus
Kuhn, 1939 (Reptilia, Weigeltisauridae).
Paleontological Journal 49(10): 1101-1111
DOI: 10.1134/S0031030115110039
http://link.springer.com/article/10.1134/S0031030115110039

https://www.researchgate.net/publication/284156582_Substantiation_of_Validity_of_the_Late_Permian_Genus_Weigeltisaurus_Kuhn_1939_Reptilia_Weigeltisauridae


The previously rejected genus of Permian gliding diapsids
Weigeltisaurus Kuhn, 1939 is actually valid. The skull morphology of
Weigeltisaurus is reassessed based on the holotype of the type species
W. jaekeli (specimen SSWG, no. 113/7). The genus Weigeltisaurus
differs from the Gondwanian genus Coelurosauravus in the reduced
infraorbital part of the jugal, the round contour of the posterior
part of the orbit, the wider postorbital regions of the postorbital
and jugal, the concave external surface of these elements, the shape
and arrangement of ornamental structures on the elements forming the
orbit, the flattened crowns of jaw teeth in the middle part of the
maxilla, the rhomboid shape of the neural spines of the posterior
cervical vertebrae, and other characters. The majority of the above
features also distinguish Weigeltisaurus from the East European genus
Rautiania.


====

E. Mujal, J.Fortuny,  P. Rodríguez-Salgado, M. Diviu , O. Oms  & À.
Galobart (2015)
First footprints occurrence from the Muschelkalk detrital unit of the
Catalan Basin: 3D analyses and palaeoichnological implications.
Spanish Journal of Palaeontology 30(1): 97-108

Free pdf:
http://www.sepaleontologia.es/revista/anteriores/REP%20(2015)%20vol.%2030/08%20Mujal%20et%20al%20color%20web-.pdf



Fossil vertebrate footprints are known from several Triassic
localities of the Iberian Peninsula. Geological setting and
palaeoichnological analysis are presented from the first recovered
tetrapod footprints from the Middle Muschelkalk facies of the Iberian
Peninsula. The studied outcrop is 40 km NW from Barcelona, in the
Catalan Coastal Ranges (Catalan Basin, NE Iberian Peninsula). The
stratigraphic section is ascribed to Middle Muschelkalk facies from
Late Anisian-Early Ladinian age (Middle Triassic), and comprises
mainly red musdtones with interebedded sandstones. Tetrapod footprints
are located  at the upper part of decimetric medium-grain size
sandstone intercalated in metric-submetric mudstone beds sequence. The
general palaeoenvironment is a floodplain with episodic torrential
events. Several 3D models from footprints were made by photogrammetry
technique, being useful in the morphological description and depth
analyses as indicator of the trackmaker's pressure-weight distribution
and locomotion-substrate interaction. Tetrapod footprints are
preserved in convex hyporelief in a sandstone bed with ripple
laminations, mud-cracks and invertebrate traces. Substrate under the
sand was muddy and soft, with progressive desiccation. There are eight
footprints from different specimens and trackmakers. Seven of them are
attributed to Isochirotherium isp. and Chirotherium isp.  In special,
there of them clearly resemble the pentadactyl morphology of
chirotheriid pes. Potential trackmakers are crurotarsians. The last
footprint is isolated and is referable to Rhynchosauroides isp.
Potential trackmaker is a lacertoid-type reptile. The finding
partially confirms the presence of homogeneous fauna diversity in the
Middle Triassic of Europe, dominated by the same ichnofamilies
reported here.