Measurements of nine morphometric characters of the genus Pinna: P. bicolor (n = 43), P. atropurpurea (n = 34), and P. deltodes (n = 10). Values are expressed as the mean ± standard deviation. TSL = total shell length (A), LAPAM = length of anterior to posterior adductor margin (B), LPAPSM = length of posterior adductor to posterior shell margin (C), LDPSM = length of dorsal posterior shell margin (D), DM = dorsal margin (E), ShW = shell width (F), SuW = sulcus width (G), PAMPNM = posterior adductor margin to posterior nacreous margin (H), DNL = dorsal nacreous length (I). Small letters above the columns indicate the results of post-hoc tests.