FIGURE 5 in Taxonomic reassessment of the freshwater mussel genus Unio (Bivalvia: Unionidae) in Russia and Ukraine based on morphological and molecular data

FIGURE 5. Anatomical features of mussels with right valve removed: A, U. pictorum (INREC-UP 603); B, U. tumidus (INREC-UT 700); C, U. crassus (INREC-UC 516). D – G, close up of apertures in life mussel: D, General sagittal view (INREC- UP 617); E, U. pictorum (INREC-UP 618); F, U. tumidus (above INREC-UT 3; below INREC-UT 4); G, U. crassus (above ZSU- UC 1; below ZSU-UC 32). Abbreviations: aam, anterior adductor muscle; exa, excurrent aperture; f, foot; ia, incurrent aperture; ig, inner gill; lp, labial palps; m, mantle; og, outer gill; pam, posterior adductor muscle; p ia, papillae in incurrent aperture; pg exa, pigmentation of excurrent aperture; sa, supra-anal aperture. Scale bar 1 cm