	Authors	Year	Title
	House	1970	On the origin of the clymenid ammonoids. Palaeontology, 13: 664-676, fig.1-2, pl.125-126; London.
	House & Price	1985	New late Devonian genera and species of tornoceratid goniatites. Palaeontology, 28 (1): 159-188, fig.1-9, pl.16-20; London.