Arthroaspis

Arthroaspis is an extinct genus of arthropod known from the Cambrian aged Sirius Passet Lagerstatte in Greenland. It is relatively large in size for Cambrian arthropods, attaining a length of up to 215 mm. It is a common component of the Passet fauna, being located at multiple localities within the formation. It possessed 14 tergites. In the describing paper, it was recovered as a member of a non-monophyletic Artiopoda.^[1] It has subsequently been considered a potential close relative of nektaspids.^[2] Another paper from 2025 which re-analyzed the Burgess Shale artiopod Helmetia expansa, found Arthroaspis to be a basal member of the Conciliterga, within the Trilobitomorpha.^[3]

Arthroaspis Temporal range: Cambrian Series 2 PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	†Artiopoda
Subphylum:	†Trilobitomorpha
Subclass:	†Conciliterga
Genus:	†Arthroaspis Stein, M., Budd, G.E., Peel, J.S. et al 2013
Species:	†A. bergstroemi
Binomial name
†Arthroaspis bergstroemi Stein, M., Budd, G.E., Peel, J.S. et al 2013