Fig. 7 in A new albanerpetontid amphibian from the Barremian (Early Cretaceous) Wessex Formation of the Isle of Wight, southern England

Fig. 7. Scanning electron micrographs of additional premaxillae of the albanerpetontid amphibian Wesserpeton evansae gen. et sp. nov. from bed 38 of the Barremian Wessex Formation at Yaverland (Figs. 1, 2), to further illustrate intraspecific variations in morphology and size. A. NHMUK PV R36597, left premaxilla in lingual (A1) and labial (A2) views; enlargement of the dorsolingual part of the pars dorsalis in lingual view (A3), to show the V−shaped facet present in this specimen. B. NHMUK PV R36598, left premaxilla in lingual (B1) and labial (B2) views. C. NHMUK PV R36599, large, robust, right premaxilla with mediolaterally wide teeth, lingual view. D. NHMUK PV R36600, left premaxilla in lingual view (D1); oblique dorsolingual view (D2), to show the palatal foramen, other openings on the pars dorsalis and the articular facet on the dorsal surface of the maxillary process for contact with the maxilla; oblique ventrolingual view (D3), to show openings in the pars palatinum and pars dentalis. E. NHMUK PV R36601, right premaxilla in lingual view (E1); enlargement to show the broken pars palatinum in lingual view (E2), revealing the inclined path (indicated by double−headed arrow) of the canal between the dorsal and ventral openings of the palatal foramen in this specimen. F. NHMUK PV R36602, right premaxilla in lingual view to show loci for 10 teeth (7th locus is empty, 9th locus is occupied by a broken tooth base and remaining loci have intact teeth). G. NHMUK PV R36603, left premaxilla in lingual view to show the dorsally expanded lingual rim of the maxillary process in this specimen. H. NHMUK PV R36604, left premaxilla in lingual view (H1), to show foramina in junction of the pars palatinum with the pars dentalis; and labial view (H2), to show deep labial foramina in this specimen. I. NHMUK PV R36605, right premaxilla in lingual (I1) and labial (I2) views. J. NHMUK PV R36606, right premaxilla in lingual (J1) and labial (J2) views.