Figure 3 in Evolutionary systematics of the viviparous gastropod Sermyla (Gastropoda: Cerithioidea: Thiaridae), with the description of a new species

Figure 3. Shell measurements and positions of landmarks for morphological analyses of the shell of Sermyla species. A, shell measurements for biometrical analysis: ShH, shell height; L3WH, height of the last three whorls; LWH, last whorl height; AW, width of the aperture; AH, height of the aperture; ShW, width of the shell. B, landmarks set for the geometric morphometric analysis.