Mollusca- Tonicella lineata
The organisms found in Phylum Mollusca in most cases are bilaterally symmetrical. Their body has more than two cell layers, as well as tissues and organs. The body cavity a true coelom similar to those organisms in Phylum Annelida. Most organisms possess a through straight gut with an anus. Their body possesses an external skeleton, in most cases, as well as 3 to 400+ pairs of jointed legs. The body is divided in 2 or 3 sections.
The Mollusca nervous system includes a brain and ganglia. In most cases, the organisms possess a respiratory system in the form of tracheae and spiracles. They possess an open or a lacunar circulatory system with a simple heart, one or more arteries, and no veins in most cases. The reproduction of the organisms in this Phylum is normally sexual and gonochoristic, but can be parthenogenetic. Mollusca feed on everything and live everywhere.
Examples of organisms found in Phylum Mollusca include: Muscles, Squid, Scallops, and Snails.
Mollusca- Octopus rubescens
-
Ramel, G. (2010). The phylum mollusca. Retrieved from http://www.earthlife.net/inverts/mollusca.html
