Billings, E.; Hall, James; Jones, T. Rupert; Salter, John William; Thompson, John Vaughan; Canada, Geological Survey of (1858). Figures and descriptions of Canadian organic remains. Montreal: Printed by J. Lovell.
ordovicianatlas.org
"Trochonematidae". Ordovician atlas of ancient life. 7 January 2014. Retrieved July 14, 2022.
