Westrop, S.R., Amati, L., Vargas-Parra, E.E., 2025. Upper Ordovician (Sandbian?Katian) species of the trilobite Calyptaulax Cooper 1930 (Pterygometopidae) from the central United States and Canada. Australasian Palaeontological Memoirs 57, 221?250.

Westrop, S.R., Landing, E., 2017. The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlationAbstract. Geological Magazine 154, 1001-1021. doi:10.1017/S0016756816000571