Fig. 3
Specimen MSNVI-SOST-01. a dorsal view; b the same image with marked morphological features [ak axial keel, al 1–al 2 axial lobes 1–2, br branchial region, ilk inner lyrate keel, ll 1–ll 3 lateral lobes 1–3, mr marginal rim, olk outer lyrate keel, on optic notch, pal posterior axial lobe]; c posterior view; d lateral view