|Kingdom Animale | Phylum Mollusca | Class Gastropoda|
or Periwinkle Shells
These are the most common shells on the supralittoral hard substrates, feeding on algae and lichens. The two most common genera, are Littoraria and Nodilittorina. Nodilittorina can tolerate a greater degree of heat and exposure, and can thus always be found higher up on the rocks compared to Littoraria. In temperate countries, periwinkles are sometimes cooked in soup.
From A Guide to Seashore Life by Dr Leo W H Tan and Peter K L Ng
Published by the Singapore Science Centre and sponsored by BP
@Raffles Museum of Biodiversity Research and Singapore Science Centre