Exploring phylogenetic relationships of Pteraspidiformes heterostracans (stem-gnathostomes) using continuous and discrete characters Author Randle, Emma Author Sansom, Robert S. text Journal of Systematic Palaeontology 2017 2016-07-20 15 7 583 599 http://dx.doi.org/10.1080/14772019.2016.1208293 journal article 10.1080/14772019.2016.1208293 1478-0941 10883180 BF5255A1-1417-432B-AC64-BF132A0BCC65 Lampraspis tuburculata Denison, 1970 Diagnosis. As for the genus description given by Denison (1970) . Remarks. Lampraspis tuberculata has an unornamented pre-oral field rather than the pre-oral surface described by Denison (1970) .