[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

New Allodaposuchus (Crocodylia) species from southern Pyrenees of Europe

Ben Creisler

New in PLoS ONE:

Alejandro Blanco, Eduardo Puértolas-Pascual, Josep Marmi, Bernat Vila
& Albert G. Sellés (2014)
Allodaposuchus palustris sp. nov. from the Upper Cretaceous of Fumanya
(South-Eastern Pyrenees, Iberian Peninsula): Systematics,
Palaeoecology and Palaeobiogeography of the Enigmatic Allodaposuchian
PLoS ONE 9(12): e115837.

The controversial European genus Allodaposuchus is currently composed
of two species (A. precedens, A. subjuniperus) and it has been
traditionally considered a basal eusuchian clade of crocodylomorphs.
In the present work, the new species A. palustris is erected on the
base of cranial and postcranial remains from the lower Maastrichtian
of the southern Pyrenees. Phylogenetic analyses here including both
cranial and postcranial data support the hypothesis that
Allodaposuchus is included within Crocodylia. The studied specimen
suggests little change in postcranial skeleton along the evolutionary
history of crocodylians, except for some bone elements such as the
axis, the first caudal vertebra and the ilium. The specimen was found
in an organic mudstone corresponding to a coastal wetland environment.
Thus, A. palustris from Fumanya is the first Allodaposuchus reported
in lacustrine-palustrine settings that expand the ecological range for
this genus. The S-DIVA palaeobiogeographic reconstruction of ancestral
area suggests that early members of Crocodylia rapidly widespread for
the Northern Hemisphere landmasses no later than the Campanian,
leading the apparition of endemic groups. In that way “Allodaposuchia”
represents an endemic European clade probably originated in the
Ibero-Armorican domain in the late Campanian and dispersed by the
Southern European archipelago prior to the early Maastrichtian.