Fig. 6

Alternacantha occulta gen. et sp. nov. from the Upper Hauptrogenstein, Parkinsoni Zone, upper Bajocian of Schinznach, Switzerland. a M112000 (paratype), disc exposing dorsal side; b M9384/X (paratype), proximal arm fragments in dorsal view. DAP dorsal arm plates; RS radial shields; S arm spine; SA spine articulation