Tiki microvertebrate locality (Triassic of India)

Where: Madhya Pradesh, India (23.9° N, 81.4° E: paleocoordinates 42.6° S, 51.1° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Tiki Formation (Gondwana Group), Carnian (237.0 - 228.0 Ma)

• "lower part of the Tiki Formation"

•The Tiki Formation is considered a temporal equivalent of the lower Maleri Formation, and both have 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 Tiki Formation is commonly considered equivalent in age.

• bed-level stratigraphic resolution

Environment/lithology: fluvial; paleosol/pedogenic, red, calcareous claystone

• "calcareous, red mudstone unit"; specimen is shown in section as coming from a bed of "Red clay with caliche profiles". Formation includes "red mudstone with greenish grey mottling, calcareous sandstone, cross-bedded feldspathic sandstone and a lime-pellet conglomerate horizon."

Size classes: macrofossils, mesofossils

Preservation: replaced with calcite, replaced with hematite

Collection methods: bulk, quarrying, sieve,

• "excavation of about 5 metric tons of rock material from a depth of approximately 1.5 m after removing surface material"; sediments then screenwashed

Primary reference: P. M. Datta and D. P. Das. 1996. Discovery of the oldest fossil mammal from India. Indian Minerals 50(3):217-222 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 68170: authorized by John Alroy, entered by John Alroy on 05.01.2007, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• The holotype of Tikiquania was previously included in this collection, but has now been excluded following the arguments of Hutchinson et al. (2012)
 Morganucodonta - Morganucodontidae
Gondwanadon tapani n. gen. n. sp.
Gondwanadon tapani n. gen. n. sp. Datta and Das 1996 mammal
GSI 20679