1. Sanbemardaspis pygacantha nov. gen et nov. sp. (Trilobita – Asaphidae) del Cerro San Bernardo, Salta, Republica Argentina;Aceñolaza F.G.;Ameghiniana,1973
2. Classification of the trilobite subfamilies Hystricurinae and Hintzecurinae subfam. nov., with new genera from the Lower Ordovician (Ibexian) of Idaho and Utah;Adrain J.M.;Memoirs of the Queensland Museum,2003
3. Lower Ordovician trilobites from the Baumann Fiord Formation, Ellesmere Island, Arctic Canada
4. The hystricurid trilobite Metabowmania in the Lower Ordovician (Ibexian; Stairsian) of the Great Basin, Utah and Idaho, USA;Adrain J.M.;Memoirs of the Association of Australasian Palaeontologists,2007
5. Trilobite biostratigraphy of the Stairsian Stage (upper Tremadocian) of the Ibexian Series, Lower Ordovician, western United States;Adrain J.M.;Memoirs of the Association of Australasian Palaeontologists,2014