Fred Ruhe
Well-known member
Raúl I. VEZZOSI1 & Jorge I. NORIEGA, 2017
About the systematic status of an old and forgotten specimen of terror bird (Phorusrhacidae:Mesembriornithinae) from the Miocene of Northwestern Argentina
Contribuciones del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". 7. 69-78
Abstract:
A new record of a middle-sized terror bird from northwestern Argentina is reported based on associated and fragmentary limb elements of a single specimen. The latter belongs to old collections of the MUFYCA (Ex-Instituto de Fisiografía y Geología) of Rosario city, Argentina, and remained unstudied since its finding during the 1940s. The specimen comes from Yocavil valley, east of Loma Rica locality near Andalhuala (Catamarca Province, Argentina), from the “Araucanense medio” levels. The fossil-bearing horizon can be correlated with lower levels of the Andalhuala Formation, i.e., sediments of late Miocene age (Huayquerian SALMA or Tortonian Global Stage/Age). The preserved material includes the distal end of a right femur, the proximal and distal ends of a right tarsometatarsus and several fragments of shaft of the limb bones. The comparison of anatomical characters and morphometric analysis allowed assigning the specimen to Mesembriornis Moreno, 1889, by showing a triangular asymmetric hypotarsus and a distally widened third tarsometatarsal trochlea. Both diagnostic traits define the clade Mesembriornithinae within the family Phorusrhacidae. It is noteworthy that some dimensions of the specimen presented herein exceed those known for some mesembriornithines, being very close to analogous measurements in patagornithine taxa.
Free pdf https://www.researchgate.net/profil...stern-Argentina.pdf?origin=publication_detail
Enjoy,
Fred
About the systematic status of an old and forgotten specimen of terror bird (Phorusrhacidae:Mesembriornithinae) from the Miocene of Northwestern Argentina
Contribuciones del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". 7. 69-78
Abstract:
A new record of a middle-sized terror bird from northwestern Argentina is reported based on associated and fragmentary limb elements of a single specimen. The latter belongs to old collections of the MUFYCA (Ex-Instituto de Fisiografía y Geología) of Rosario city, Argentina, and remained unstudied since its finding during the 1940s. The specimen comes from Yocavil valley, east of Loma Rica locality near Andalhuala (Catamarca Province, Argentina), from the “Araucanense medio” levels. The fossil-bearing horizon can be correlated with lower levels of the Andalhuala Formation, i.e., sediments of late Miocene age (Huayquerian SALMA or Tortonian Global Stage/Age). The preserved material includes the distal end of a right femur, the proximal and distal ends of a right tarsometatarsus and several fragments of shaft of the limb bones. The comparison of anatomical characters and morphometric analysis allowed assigning the specimen to Mesembriornis Moreno, 1889, by showing a triangular asymmetric hypotarsus and a distally widened third tarsometatarsal trochlea. Both diagnostic traits define the clade Mesembriornithinae within the family Phorusrhacidae. It is noteworthy that some dimensions of the specimen presented herein exceed those known for some mesembriornithines, being very close to analogous measurements in patagornithine taxa.
Free pdf https://www.researchgate.net/profil...stern-Argentina.pdf?origin=publication_detail
Enjoy,
Fred
