Laterality of shell formation differs in two sympatric gastropod species: mulberry shell (Tenguella granulata), and strawberry topshell (Clanculus pharaonius)

Abstract We studied and found that the populations of two gastropod species in inter-tidal zone Red Sea at Eilat demonstrate a predominantly dextral chirality their shells. identified lateralization sinistral/dextral shell torsion for 675 live Tenguella granulata (left = 114, 16.9%; right 561, 83.1%) 405 Clanculus pharaonius 102, 25.2%; 303, 74.8%). In both cases, we differences between sinistral torsions . The ecological evolutionary consequences individuals with are unclear, but there indications it is directional rather than stochastic process.