FIG. 3. — 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. 3. — Asterolepis alticristata n. sp.: A-C, NUFV 1265, nuchal plate in dermal (A, photograph; A', labeled illustration), visceral (B, photograph; B', labeled illustration), and caudal (C) views; D-F, NUFV 813, premedian plate in dermal (D), visceral (E), and caudal (F) views; G-I, NUFV 812, premedian plate in dermal (G), visceral (H), and caudal (I) views. Abbreviations: cpl, central pit-line line groove; cv.L, area overlapping the lateral plate; cv.Pn, area overlapping the paranuchal plate; d.end, endolymphatic duct; ifc1, principal section of infraorbital pit-line groove; ml.p, midline process; mo.c, median occipital crista; nm, obtected area; pr.p, prerostral process; ps.f, parasagittal foramina; sop, supraoccipital pit; sot, supraotic thickening. Scale bar: 2 cm.