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Timonya, Procuhy, new temnospondyls from Permian of Brazil (free pdf)
A new paper in open access:
Juan C. Cisneros, Claudia Marsicano, Kenneth D. Angielczyk, Roger M.
H. Smith, Martha Richter, Jörg Fröbisch, Christian F. Kammerer &
Rudyard W. Sadleir (2015)
New Permian fauna from tropical Gondwana.
Nature Communications 6, Article number: 8676
Terrestrial vertebrates are first known to colonize high-latitude
regions during the middle Permian (Guadalupian) about 270 million
years ago, following the Pennsylvanian Gondwanan continental
glaciation. However, despite over 150 years of study in these areas,
the biogeographic origins of these rich communities of land-dwelling
vertebrates remain obscure. Here we report on a new early Permian
continental tetrapod fauna from South America in tropical Western
Gondwana that sheds new light on patterns of tetrapod distribution.
Northeastern Brazil hosted an extensive lacustrine system inhabited by
a unique community of temnospondyl amphibians and reptiles that
considerably expand the known temporal and geographic ranges of key
subgroups. Our findings demonstrate that tetrapod groups common in
later Permian and Triassic temperate communities were already present
in tropical Gondwana by the early Permian (Cisuralian). This new fauna
constitutes a new biogeographic province with North American
affinities and clearly demonstrates that tetrapod dispersal into
Gondwana was already underway at the beginning of the Permian.