Heteromorph ammonites from the Upper Maastrichtian of Pondicherry, south India
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The heteromorph ammonites (Ancyloceratina) from the Upper Maastrichtian Valudavur Formation (Valudayur Group, Anisoceras beds of authors) of Pondicherry, south India are revised in a sequel to the previously published account of the normally coiled Phylloceratina, Lytoceratina and Ammonitina. Twelve species referred to eight genera are recognized, of which Cyrtoptychoceras is a new representative of the Polyptychoceratinae. The fauna is of great importance in the development of heteromorph ammonite taxonomy, although a source of great confusion to previous workers. It represents the most diverse Upper Maastrichtian heteromorph assemblage known.
Palaeontology - Volume 35 Part 3 Pages 693-731Palaeontology - Volume 35 Part 3 Pages 693-731
Citations
KENNEDY, W. J., HENDERSON, R. A. 1992. Heteromorph ammonites from the Upper Maastrichtian of Pondicherry, south India. Palaeontology, 35, 3, 693–731.