Lower and Middle Triassic Ammonites from Portuguese Timor (Palaeontological Study of Portuguese Timor, 4)

Abstract

Sixteen species of the Lower and Middle Triassic ammonites collected from Manatuto and Pualaca in the Portuguese east Timor Island are described. Dieneroceras fauna, Leiophyllites fauna and Danubites sp. in the west of Manatuto indicate the early Late Skythian (Owenitan), the Latest Skythian (Prohungaritan), and the Early Anisian age, respectively. Leiophyllites, Tropigastrites and Procarnites obtained from Pualaca are probably of the Earliest Anisian. These are the first occurrence of the Lower and Middle Triassic ammonites from the eastern part of the island with the exception of the occurrence of Dinarites hirschii described by WANNER from the ejecta of a mud volcano.