Abstract
Abstract Forty‐one species of trilobites and two of graptolites are described from the Patriarch Formation and the overlying Summit Limestone of the northwest Nelson area, New Zealand. Most of the trilobites are recorded for the first time from Australasia. The stratigraphy of both formations is revised and stratigraphic columns presented. Five successive faunules, shown to span the Cambrian‐Ordovician boundary, are recognised in the sequence, and are correlated internationally. Stratigraphically important conodonts from the area are figured and briefly discussed. Faunule 1, in the lower 220 m of the Patriarch Formation, contains the Lotagnostus‐Hedinaspis‐Hysterolenus trilobite fauna, which is found around the world in Late Cambrian strata. Twenty‐three trilobite species occur, including three new species: the aulacopleurid Proteuloma ahu, the shumardiid Shumardia (Conophrys) tauwhena, and the nepeid Amzasskiella kupenga. Faunule 2, from the upper 250 m of the Patriarch Formation, contains the graptolite...
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