Authors Year Title
Korn 1997 The Palaeozoic ammonoids of the South Portuguese Zone.
Memórias do Instituto geológico e Mineiro 33: 1-131, 69 text-figs., 16 pls., Lisboa.
Korn & Ebbighausen 2008 The Early Carboniferous (Mississippian) ammonoids from the Chebket el Hamra (Jerada Basin, Morocco).
Fossil Record 11 (2) 2008: 83-156, 72 fig.
Moore & Hodson 1958 Goniatites from the Upper Viséan shales of County Leitrim, Eire.
Liverpool and Manchester geological Journal, 2 (1); 86-105, fig.1-21, pl.3-10; Liverpool.