Figure 7 in The evolutionary and biomechanical implications of snout and proboscis morphology in Caenogastropoda (Mollusca: Gastropoda)

Figure 7. Transverse histological sections through the proboscis of three "ptenoglossan" taxa. (A) Mesophora fusca (Triphoridae) introverted proboscis and ventral odontophoral retractor muscles; (B) M. fusca proboscis wall; (C) Ataxocerithium sp. (Cerithiopsidae) introverted proboscis and aortic muscles; (D) Ataxocerithium sp. proboscis wall (E) Apicalia cf. brazieri (Eulimidae) partially everted proboscis; (F) Apicalia cf. brazieri introverted proboscis and aortic muscles (G) Apicalia cf. brazieri proboscis wall. Scale bars: (A, C, E, F) 200 µm; (B, D, G) 50 µm; for abbreviations see Appendix 2.