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Figure 5 | BMC Evolutionary Biology

Figure 5

From: Arthroaspisn. gen., a common element of the Sirius Passet Lagerstätte (Cambrian, North Greenland), sheds light on trilobite ancestry

Figure 5

Ventral 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.

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