Where: Tamil Nadu, India (11.1° N, 78.9° E: paleocoordinates 44.7° S, 46.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Cremnoceramus deformis erectus inoceramid zone, Anaipadi Formation, Early/Lower Coniacian (89.3 - 85.8 Ma)

• The ammonite assemblage indicates the Kossmaticeras theobaldianum ammonite Zone. The lack in the assemblage of Peroniceras (P.) dravidicum (Kossmat, 1895) indicates that only the lower part of the zone is present, and namely the nominative Kossmaticeras theobaldianum Subzone of Ayyasami and Rao (1984). Inoceramids from the interval studied are from a middle part of the fossiliferous belt. They are represented by numerous Tethyoceramus madagascariensis (Heinz, 1932) and rare Cremnoceramus deformis erectus (Meek, 1877). The presence of the latter, the first recorded from India, places the inoceramid levels within the C. deformis erectus Zone, which dates the interval as early Coniacian in inoceramid terms, and allows, for the first time, direct chronostratigraphic dating of the Tethyoceramus madagascariensis Zone.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, calcareous claystone

Size class: macrofossils

Collection methods: Repository: Stanisław Józef Thugutt Museum of the Faculty of Geology of the University of Warsaw

Primary reference: I. Walaszczyk, W. J. Kennedy, and A. R. Paranjape. 2018. Inoceramids and associated ammonite faunas from the uppermost Turonian-lower Coniacian (Upper Cretaceous) of the Anaipadi–Saradamangalam region of the Cauvery Basin, south-east India. Acta Geologica Polonica 68:663-687 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 198603: authorized by Matthew Clapham, entered by Matthew Clapham on 26.12.2018

Creative Commons license: CC BY (attribution)