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The ostracod assemblages from the Newmarracarra Limestone Formation (Early Bajocian, Western Australia) are highly unusual in being formed exclusively by members of the superfamily Cytheroidea. They are also apparently composed dominantly of endemic taxa, with three new genera defined here (Bringocythere, Fistulosacythere, Gondwanacythere) and only three other genera known from elsewhere in the southern...
Middle Jurassic ammonites collected in situ from the Lanongla sections, Lanongla, South Tibet allow the precise dating of the ferruginous Oolite beds and the underlying limestone beds in this area. A large hiatus of 8 million-year duration in South Tibet is well documented by the ammonite succession. Revision of sea-level changes curve in Tibet during the Middle Jurassic is proposed; the high sea-level...
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