FIG. 2. — Asterolepis alticristata n in Asterolepis alticristata n. sp. (Antiarchi) from the Upper Devonian (Frasnian) of Nunavut, Canada, and a report on the antiarch diversity of the Fram Formation

FIG. 2. — Asterolepis alticristata n. sp., NUFV 897, holotype, anterior median dorsal plate in visceral (A, photograph; A', labeled illustration), cranial (B), left lateral (C), and dermal (D) views. Abbreviations: cd.PMD, area overlapped by the posterior median dorsal plate; cv.ADL, area overlapping the anterior dorsolateral plate; cv.Mxl, area overlapping the mixilateral plate; lc, lateral corner; op.r oblique posterolateral ridge. Scale bar: 5 cm.