Figure 4.
Trachymetopon (“Macropoma”) substriolatum (holotype, SMC J27415) from the Kimmeridgian of Cottenham, Cambridgeshire. Photograph (1) and semi-interpretative drawings (2) in dorsal (a), ventral (b), anterior (c), left lateral (d) and right lateral (e) views. Scale bars = 50 mm. Abbreviations: Ang, angular; Bsph, basisphenoid; Ext, extrascapular; Gu, gular; L.j, lachrymojugal; Op, opercle; Par, parasphenoid; p.Co, principal coronoid; Pop, preopercle; Pp, postparietal; Po, postorbital; Q, quadrate; Sc, scale; So, supraorbital; Sq, squamosal; Stt, supratemporal.