Figure 1. Terminology followed for the otic–occipitum complex. A–F in A comparative atlas of selected skeletal elements of European urodeles (Amphibia: Urodela) for palaeontological investigations

Figure 1. Terminology followed for the otic–occipitum complex. A–F, left otic–occipitum complex of Salamandra salamandra from left to right in dorsal, ventral, anterior, posterior, medial and lateral views. G–L, right otic–occipitum complex of Lissotriton vulgaris from left to right in dorsal, ventral, anterior and lateral views. Abbreviations (newly introduced terms are in quotes): 'acav, auditory cavity'; bco, basicapsular commissure; bpr, processus basalis; crr, crista retrosellaris; fba, fenestra basicranialis posterioris; fend, foramen endolymphaticum; ffa, foramen faciale; fo, fenestra ovalis; fper, foramen perylimphaticum; fpo, foramen postoticum; fpro, foramen prooticum; hco, hypochordal commissure; 'lts, lamina of the tectum synoticum'; 'mcr, medial crest'; 'md, middle depression'; occ, occipital cotyle; otpr, otic process; pan, prominentia semicircularis anterioris; par, parietal crest; pcr, parotic crest; pla, prominentia semicircularis lateralis; ppr, parotic process; pps, prominentia semicircularis posterioris; preco, prefacial commissure; spe, sulcus petrosus; sulc, sulcus carotis; tsyn, tectum synoticum. Scale bars: 1 mm.