FIG. 3 in A new Placoderm fish (Acanthothoraci) from the Early Devonian Jauf Formation (Saudi Arabia)

FIG. 3. — Incomplete skull roofs of Arabosteus variabilis n. gen., n. sp. in dorsal views: A, B, MNHN.F.1992-6-132, holotype and skull roof reconstruction; C, D, MNHN.F.1992-6-133, original specimen and outline drawing of the bone suture pattern. Arrows indicate anterior. The grey area indicates the missing external bone. Labels in italics indicate the sensory line system; regular labels indicate the skull bones. Abbreviations: Ce, central plate; d.end, endolymphatic duct opening; lc, main lateral sensory line groove; Mg, marginal plate, m.o.fo, muscular occipital fossa; mpl, middle pit line; Nu, nuchal plate; Pan.a, anterior paranuchal plate; Pan.m, medial paranuchal plate; Pan.p, posterior paranuchal plate; pmc, postmarginal sensory line canal; ppl.a, posterior pit line anterior part; ppl.p, posterior pit line posterior part; Pro, preorbital plate; Pto, postorbital plate; soc, supraorbital sensory line groove. Scale bars: 1 cm.