Abstract
Upper Cretaceous ammonites are described from six horizons in the mammal-bearing terrigenous-clastic sequences of western Uzbekistan, as follows: Upper Cenomanian, with
Placenticeras sp. juv. cf.
cumminsi Cragin, 1893 and
Metoicoceras geslinianum (d’Orbigny, 1850); Lower Turonian with
Tragodesmoceras cf.
mauryae Kennedy and Wright, 1981,
Placenticeras kharesmense (Lahusen, 1884),
Watinoceras coloradoense (Henderson, 1908),
Watinoceras amudariense (Arkhangelsky, 1916b),
Metasigaloceras rusticum (J. Sowerby, 1823),
Morrowites wingi (Morrow, 1935),
Sciponoceras cf.
bohemicum bohemicum (Fritsch, 1872), and
Yezoites amudariensis (Arkhangelsky, 1916b); Middle Turonian with
Collignoniceras woollgari woollgari (Mantell, 1822); Upper Turonian with
Lewesiceras mantelli (Wright and Wright, 1951) and
Placenticeras crassum Ilyin, 2020; a single
Placenticeras semiornatum (d’Orbigny, 1850) from around the Coniacian/Santonian boundary, and Santonian
Placenticeras polyopsis (Dujardin, 1837).
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