FIG. 8. — Arabosteus variabilis n. gen., n in A new Placoderm fish (Acanthothoraci) from the Early Devonian Jauf Formation (Saudi Arabia)

FIG. 8. — Arabosteus variabilis n. gen., n. sp. skull roof ornamentation (MNHN.F.1992-6-136): A, silicone cast of the skull roof impression in matrix; B, zoom showing oval and elongate tubercles. The black frame shows the enlarged area. Arrows indicate anterior. Labels in italics indicate the sensory line system. Abbreviations: d.end, endolymphatic duct opening; mpl, middle pit line; ppl.a, posterior pit line anterior part; ppl.p, posterior pit line posterior part; soc, supraorbital sensory line groove. Scale bars: A, 1 cm; B, 0.5 cm.