FIG. 9 in A new Placoderm fish (Acanthothoraci) from the Early Devonian Jauf Formation (Saudi Arabia)

FIG. 9. — Reconstructions of the skull roof of: A, the arthrodire Simblaspis cachensis Denison, 1958 (modified after Denison 1958); B, the petalichthyid Lunaspis broilii Gross, 1937 (modified after Goujet 1972); C, the acanthothoracid Romundina stellina Orvig, 1975 (modified after Goujet & Young 2004). Arrows indicate anterior. Labels in italics indicate the sensory line system; regular labels indicate the skull bones. Abbreviations: Al, anterior lateral plate; cc, central sensory line groove; Ce, central plate; cu.so, cutaneous sensory organ; d.end, endolymphatic duct opening; ifc, infraorbital sensory line groove; lc, main lateral sensory line groove; Mg, marginal plate; mpl, middle pit line; Nu, nuchal plate; occ, occipital cross commissure; Pan.a, anterior paranuchal plate; Pan.m, medial paranuchal plate; Pan.p, posterior paranuchal plate; pfc, profundus sensory line groove; Pi, pineal plate; pmc, postmarginal sensory line groove; Pmg, postmarginal plate; Pn, paranuchal plate; ppl.a, posterior pit line anterior part; ppl.p, posterior pit line posterior part; Prm, premedian plate; Pro, preorbital plate; Ptn, postnasal plate; Pto, postorbital plate; Ro, rostral plate; Rp, rostropineal plate; Sm, submarginal plate; soc, supraorbital sensory line groove. Scale bars: A, 1 cm; B, 2 cm; C, 0.5 cm.