FIG. 4 in A new Placoderm fish (Acanthothoraci) from the Early Devonian Jauf Formation (Saudi Arabia)

FIG. 4. — Incomplete skull roofs of Arabosteus variabilis n. gen., n. sp. in dorsal views: A, MNHN.F.1992-6-138; B, MNHN.F.1992-6-137; C, MNHN.F.1992-6-139. Arrows indicate anterior. 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; Nu, nuchal plate; pmc, postmarginal sensory line canal; Pan.a, anterior paranuchal plate; Pan.m, medial paranuchal plate; Pan.p, posterior paranuchal plate; ppl.p, posterior pit line posterior part; Pro, preorbital plate; soc, supraorbital sensory line groove. Scale bars: 1 cm.