The 'Wuchiapingian' (also known as 'Wujiapingian', 'Djulfian', 'Dzhulfian', 'Longtanian', 'Rustlerian', 'Saladoan', 'Kazanian', or 'Castile') is the first of two
stages of the
Lopingian epoch of
Permian period. It spans the time between 260.4 ± 0.7
Ma and 253.8 ± 0.7 Ma (million years ago).
References
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GeoWhen Database - Wuchiapingian