MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
New dinosaur species from the Upper Triassic Upper Maleri and Lower Dharmaram formations of Central India
Autor/es:
FERNANDO E. NOVAS; MARTIN D. EZCURRA; SANKAR CHATTERJEE; THARAVAT KUTTY
Revista:
EARTH AND ENVIRONMENTAL SCIENCE TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH
Editorial:
ROYAL SOC EDINBURGH
Referencias:
Año: 2011 p. 333 - 349
ISSN:
1755-6910
Resumen:
ABSTRACT: The beginning of dinosaur evolution is currently known based on a handful of
highly informative Gondwanan outcrops of Ischigualastian age (late Carnianearly Norian). The
richest Triassic dinosaur records of the southern continents are those of South America and South
Africa, with taxonomically diverse faunas, whereas faunas from India and central Africa are more
poorly known. Here, the known diversity of Gondwanan Triassic dinosaurs is increased with new
specimens from central India, which allow a more comprehensive characterisation of these dinosaur
assemblages. Five dinosauriform specimens are reported from the probable late Norianearliest
Rhaetian Upper Maleri Formation, including two new sauropodomorph species, the nonplateosaurian
Nambalia roychowdhurii and the plateosaurian Jaklapallisaurus asymmetrica, a guaibasaurid
and two basal dinosauriforms. The Lower Dharmaram Formation, probably latest
NorianRhaetian in age, includes basal sauropodomorph and neotheropod remains, providing the
second record of a Triassic Gondwanan neotheropod. The currently available evidence suggests that
the oldest known Gondwanan dinosaur assemblages (Ischigualastian) were not homogeneous, but
more diverse in South America than in India. In addition, the Upper Maleri and Lower Dharmaram
dinosaur assemblages resemble purported coeval South American and European beds in the presence
of basal sauropodomorphs. Accordingly, the current available evidence of the Triassic beds of the
PranhitaGodavari Basin suggests that dinosaurs increased in diversity and abundance during the
late Norian to Rhaetian in this region of Gondwana.and the plateosaurian Jaklapallisaurus asymmetrica, a guaibasaurid
and two basal dinosauriforms. The Lower Dharmaram Formation, probably latest
NorianRhaetian in age, includes basal sauropodomorph and neotheropod remains, providing the
second record of a Triassic Gondwanan neotheropod. The currently available evidence suggests that
the oldest known Gondwanan dinosaur assemblages (Ischigualastian) were not homogeneous, but
more diverse in South America than in India. In addition, the Upper Maleri and Lower Dharmaram
dinosaur assemblages resemble purported coeval South American and European beds in the presence
of basal sauropodomorphs. Accordingly, the current available evidence of the Triassic beds of the
PranhitaGodavari Basin suggests that dinosaurs increased in diversity and abundance during the
late Norian to Rhaetian in this region of Gondwana.