A Division scheme of a shell surface into cells; A–D: posterior-anterior direction, 1–3: dorso-ventral direction. B Mantle attachment scars (MS) on the inner surface of a Margaritifera margaritifera shell

  Part of: Zotin AA, Ieshko EP (2019) Quantification of mantle attachment scars on the Margaritifera margaritifera (Margaritiferidae, Bivalvia) shell. Arctic Environmental Research 19(2): 81-86. https://doi.org/10.3897/issn2541-8416.2019.19.1.81