CASADIO Silvio Alberto
First Early Cretaceous record of Podocarpaceae wood associated with dinosaur remains from Patagonia, Neuquén Province, Argentina
GNAEDINGER, S.; CORIA, R.; KOPPELHUS, EVA; CASADÍO, S.; TUNIK, M.; CURRIE, P
CRETACEOUS RESEARCH (PRINT)
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Lugar: Amsterdam; Año: 2017 vol. 78 p. 228 - 239
The first Podocarpaceae wood record is described from the Mulichinco Formation (Valanginian, LowerCretaceous), Neuquen Basin, Argentina. The specimen was directly associated with a middle caudalvertebra of a diplodocid sauropod dinosaur. A new species e Podocarpoxylon prumnopityoides e isproposed based on features that include the presence of abietinean wood type (tracheid radial pitting),plus podocarpoid (cupressoid type) and some dacrydioid (taxodioid type) cross-field pits, diffuse axialparenchyma and low rays. This combination of anatomical characters is comparable to both Prumnopitysand Podocarpus, whereas the type of pits in the cross-fields resembles some members of the extantPrumnopitys. This is the first unequivocal record of the Family Podocarpaceae in the Valanginian of SouthAmerica and confirms the hypothesis that the divergence between the ?Podocarpoid-Dacrydioid? and?Prumnopityoid? clades occurred earlier than the Early Cretaceous.