Donacides are distributed at sandy beaches all over the world except the Polar
Regions, whereas the number of total species is 64. Many species of this family
are demonstrating a valuable source for the artesanal fisheries. D. marincovichi
and D. obesulus (Fig.1 and 2) inhabit beaches from Northern Chile to Northern
Ecuador in dense populations. The taxonomy of D. marincovichi and D. obesulus
are controversially controversially discussed discussed. Sperm morphology morphology is useful for taxonomic taxonomic
identification, frequently applied for mollusk taxonomy.