CLASSIFICATION OF MUREX ANGULIFER
PHYLUM :- MOLLUSCA (Unsegmented bilaterally symmetrical and provided with visceral mass, foot and mantle. )
CLASS :- GASTROPODA (Visceral hump twisted.)
SUB-CLASS :- PROSOBRANCHIATA (Gills in front of heart.)
ORDER :- PECTINIBRANCHIATA (Ctenidium comb-like or monopectinate.)
SUB-ORDER :- RACHIGLOSSA (Radula with 3 or less teeth in a row.)
GENUS :- Murex
SPECIES :- angulifer
It is found on the Syrian coast, Greece, Italy, India, West Indies and U.S.A. (California). Found both in tropical and temperate seas.
HABIT AND HABITAT
Murex is an active, carnivorous and marine gastropod, feeding on living and dead animals in the sea.
GENERAL CHARACTERSTICS OF MUREX ANGULIFER
- Shell is spirally coiled, dextral with a long and prominent spine bearing 3 or more rows of prominent protuberances or spines forming ribs.
- Aperture round, ending below in a long canal.
- Peristome is produced into a long, spout-like prolongation known as the shell siphon which leads into the mantle cavity.
- Head is prolonged anteriorly into a long proboscis, which can be retracted within a proboscis sheath.
- Foot is large and tough, having flat creeping sole.
- Shell is spirally twisted with an operculum.
- Sexes are separate. The male has proje( ting muscular penis. The visceral hump is spirally coiled.
- Eyes are placed at the base of the tentacles. Salivary glands and liver contain proteolytic enzymes.
- Heart has one auricle and kidney is also one.
- Nervous system is highly concentrated.
Some species of Murex are destructive to oyster industry. It has also ornamental importance and is also used for producing worshipping sound (Shankh). In ancient times the wellknown Tyrian or imperial purple dye was obtained from M. trunculus and M. bramdoris. The dye consisted of a yellowish secretion from a large mucous gland in the mantle.
The animal has spirally coiled shell rib and all above feature hence it is Murex.