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.

Landing, E., Westrop, S.R., 1998. Avalon 1997 - The Cambrian Standard. Third International Field Conference of the Cambrian Chronostratigraphy Working Group and I.G.C.P. Project 366 (Ecological Aspects of the Cambrian Radiation).. New York State Museum BulletinThe University of the State of New York, Albany, New York.

Landing, E., Westrop, S.R., Keppe, J.D., 2007. Terminal Cambrian and Lowest Ordovician Succession of Mexican West Gondwana: Biotas and Sequence Stratigraphy of the Tinu Formation. Geological Magazine 144, 909-936.

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