English: From paper: Reconstructions and phylogenetic relationships of Amiskwia sagittiformis. a Dorsal (left), ventral (middle) and lateral (right) views of the head. b Ventral plate in dorsal view. c Jaws in ventral view. d, e Drawings of basal plate and jaw of extant Filospermoidea gnathostomulids; d Cosmognathia aquila, e Haplognathia gubbarnorum. f cladogram based on ref. 23, showing possible phylogenetic positions of A. sagittiformis within Gnathifera: stem gnathiferans (1), stem gnathostomulids (2). g Artistic reconstruction. Figure panels (a–e, g) by Brittany Cheung © Royal Ontario Museum