Figure 5From: Arthroaspisn. gen., a common element of the Sirius Passet Lagerstätte (Cambrian, North Greenland), sheds light on trilobite ancestryVentral cephalic structures of Arthroaspis bergstroemi n. gen. n. sp. A. MGUH 30417, showing impression of hypostome and cephalic sternites (dorsal aspect); B. MGUH 30391, showing the insertion of cephalic appendages (ventral aspect); C. MGUH 30407 (cpt), close up of anterior glabellar region, showing preglabellar crease and possible median node.Back to article page