Fig. 18 in Cladistic analysis of the transisthmian genus Eurytellina (Bivalvia: Tellinoidea) based on morphological and morphometric data

Fig. 18 Detail of proximal aperture and muscular attachments of siphons (total excision of left siphonal muscle in "a" and "b"), siphonal membrane (sme) between both internal apertures, siphonal organ (so) and siphonal muscle branches (rs1 and rs2): a) Eurytellina lineata; b) Macoma constricta; c) E. angrensis (detail of siphonal organ on left branch of siphonal muscle). Scale: 1 mm