Reconstruction of the skull in †Scheenstia zappi, modified from [121]. Abbreviations: a.io, anterior infraorbital bone; ag, angular bone; ao, antorbital bone; a.pl, anterior pit line; cl, cleithrum; d, dentary; dpt, dermopterotic bone; dsph, dermosphenotic bone; ex, extrascapular bone; fr, frontal bone; io, infraorbital bone; io.c, infraorbital sensory canal; iop, interoperculum; ju, jugal bone; la, lachrymal; m.c, mandibular sensory canal; m.pl, middle pit line; mx, maxilla; na, nasal bone; o.c, orbital sensory canal; oc.c, occipital sensory canal; op, operculum; pa, parietal bone; pcl, postcleithrum; pio, posterior infraorbital bone; pmx, premaxilla; pop, preoperculum; pop.c, preopercular sensory canal; ptt, post-temporal bone; scl, supracleithrum; sio, subinfraorbital bone; so.c, supraorbital sensory canal; so, supraorbital bone; sop, suboperculum; suo, suborbital bone; t.c, temporal sensory canal. Scale bar, 1 cm.