Dartmuthia procera Märss, Afanassieva et Blom, 2014

Sculpture of narrow, strongly elongate, subparallel to parallel, relatively high ridges with distinct serrated margins; space between ridges always covered with flat tesserae; margins of tesserae notched; superficial layer of the exoskeleton strongly developed in the ridges with numerous arising canals of the upper vascular plexus in the ridges; relatively thick tesserae situated separately from each other, posterior processes of tesserae may overlap the tesserae behind.