Fig. 4 in Revision of Tympanopleura Eigenmann (Siluriformes: Auchenipteridae) with description of two new species

Fig. 4. Neurocranium of Tympanopleura atronasus in ventral view, UF 185769 (91.0 mm SL). Jaw apparatus, gas bladder, and some dorsomedial cranial bones omitted. Abbreviations: boc, basioccipital; epo-p, posterior process of epioccipital; exo, exoccipital; let, lateral ethmoid; mes, mesethmoid; mr, Müllerian ramus; orb, orbitosphenoid; os, os suspensorium par, parasphenoid; pro, prootic; pto, pterotic; scl, posttemporal-supracleithrum; sph, sphenotic; tri, tripus; tsl, transcapular ligament; vom, vomer. Scale bar = 5 mm.