Summary
The family Rissoidae is a family of small-sized prosobranch, gastropods found all around the globe. They can be found in marine and brackish environments, with distribution ranging from the tropics to the Arctic and Antarctic (Ponder, 1985). Most Rissoids are found in high abundance through inter-tidal and shallow, sub-littoral environments feeding on algae (Avila, et al. 2012).There are however, a few species that have been discovered at continental shelves and in abyssal zones (Ponder, 1985). Species from the family Rissoidae, are quite difficult to identify due to their small size and similar physiology (Ponder, 1985). The unidentified species of this study shows similarities to a number of genus', such as Voorwindia and Setia. This study looks at physical, behavioural and functional characteristics of the unknown species to get a better understanding of its nature. Experiments were set up to test the movement behaviour and reproductive development of the unknown species. |