New anuran material from Deseadan beds of Scarritt Pocket, Chubut Province, and the supposed presence of palearctic bufonids in the Oligocene of Patagonia.
Am. Baez et Jc. Fernicola, New anuran material from Deseadan beds of Scarritt Pocket, Chubut Province, and the supposed presence of palearctic bufonids in the Oligocene of Patagonia., AMEGHINIANA, 36(1), 1999, pp. 23-35
In 1949 Schaeffer described several anuran taxa based on remains from Desea
dan beds of the western part of the meseta Canquel in central Patagonia. Am
ong those taxa is the extinct neobatrachian Neoprocoela I dentata Schaeffer
, the evolutionary relationships of which are still controversial. It was s
uggested that this species is related to the Bufo calamita Laurenti species
group, which has a Palearctic distribution at present. Subsequently, it wa
s claimed that additional material collected from the same beds and localit
y confirmed the presence of the B. calamita group in Patagonia. The specime
n on which this latter statement apparently was based was prepared and is d
escribed herein. Comparisons of the preserved elements neither support refe
rral to Neoprocoela, nor their bufonid affinities; instead, the squamosals,
vertebral column, humeri, and ilia resemble those of telmatobine "leptodac
tylids".