WebJan 14, 2004 · Head-footed mollusks ; All marine; 21. The only cephalopod with a shell is the chambered nautilus. The cuttlefish has a reduced internal shell. Very complex structures . 22. The foot has evolved into structures with hooks, suckers or adhesive structures. The tentacles bring the prey to the mouth where it is bitten by the beak-like jaw. WebThe 5 main types of molluscs 1. Gastropods Number of species: ~70,000 The gastropods are the largest group of molluscs and can be found in saltwater, freshwater and terrestrial environments. Most people are …

The Cephalopoda - University of California Museum of …

WebClassification. Octopus and squid belong to a group of marine invertebrates known as cephalopods. Cephalopod means ‘head-footed’ – the arms and tentacles are derived … WebHead-Foot Most molluscs have well-developed heads, which bear their mouth and some specialized sensory organs. Photosensory receptors range from fairly simple ones to the complex eyes of cephalopods. Tentacles … cs go setup pro

Squid Definition, Order, Tentacles, Food, & Facts Britannica

WebHead foot - the mollusk will have a definite head that is surrounded by tentacles. Generally the body of the mollusks is made up of three regions. The head, visceral mass, and a foot. The brain and sensory organs are … WebJan 25, 2024 · The characteristics of Phylum Mollusca are listed below: These are mostly marine habitats, and some are freshwater habitats. They are triploblastic, bilaterally symmetrical with organ system level of organization. The body of molluscs is unsegmented with a distinct head, muscular foot and visceral hump. WebThe class Cephalopoda, which means "head foot", are mollusks and therefore related to bivalves (scallops, oysters, clams), gastropods (snails and slugs), scaphopoda (tusk shells), and polyplacophorans (chitons). Some mollusks, such as bivalves, don't even have a head, much less something large enough to be called a brain! dj project soapte solista