Wigaon (Triassic to of India)

Where: Andhra Pradesh, India (19.2° N, 79.7° E: paleocoordinates 36.4° S, 38.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lower Maleri Formation (Gondwana Group), Carnian to Carnian (237.0 - 208.5 Ma)

• The lower Maleri Formation has been correlated on the basis of vertebrate biostratigraphy with the Scaphonyx-Exaeretodon-Herrerasaurus biozone of the Ischigualasto Formation of Argentina and the Hyperodapedon Assemblage Zone of the Santa Maria Formation of Brazil (e.g. Novas et al. 2011. Earth Env. Sci. Trans. Roy. Soc. Edin. 101:333-349). The relevant part of the Ischigualasto Formation has been dated as late Carnian in age on radioisotopic data (e.g. Martinez et al. 2011. Science 331: 206-210), and the lower Maleri Formation is commonly considered equivalent in age.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by P. Robinson, ISI

• ISI: Indian Statistical Institute, Kolkata

Primary reference: S. Chatterjee. 1974. A rhynchosaur from the Upper Triassic Maleri Formation of India. Philosophical Transactions of the Royal Society of London, Series B, Biological Sciences 267(884):209-261 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 136903: authorized by Richard Butler, entered by Richard Butler on 06.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Eosuchia - Rhynchosauridae
"Paradapedon huxleyi" = Hyperodapedon huxleyi
"Paradapedon huxleyi" = Hyperodapedon huxleyi Lydekker 1881 rhynchosaur
ISI R5, skull