Aglaspididids

Aglaspidida, Walcott (1912) represents a major and diverse –
yet historically problematic – group of early Palaeozoic euarthropods typified by a biomineralized phosphatic exoskeleton (Briggs & Fortey, 1982). Although
aglaspidids are relatively poorly understood, recent studies have produced significant insights into their morphology (e.g. Van Roy, 2006), biostratigraphic range (e.g. Fortey & Rushton, 2003, 2009; Lerosey-Aubril et al. 2013), palaeobiogeographic distribution and phylogenetic position
within the evolutionary context of Artiopoda, and even the entire phylum Euarthropoda.