Fig. 5From: A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern GondwanaLine drawings of labial views of eubrachythoracid posterior superognathals. Note the great differences in dimensions. a L. ziregensis. b Plourdosteus canadensis. c Coccosteus cuspidatus. d Harrytoombsia elegans e Mcnamaraspis kaprios. f Eastmanosteus calliaspis. g Torosteus pulchellus. h Compagopiscis croucheri. All scale bars equal 10 mmBack to article page