What does class cephalopoda include?

What does class cephalopoda include?

This class contains the cephalopods, animals commonly known as squid, cuttlefish, octopus, and nautilus. The giant squid is the largest of all mollusks. Members of the subclass Coleoidea (the squid, cuttlefish, and octopus), have an internal shell or no shell at all.

What are common examples of the class cephalopoda?

• Octopus. Aside from being one of the most recognizable cephalopods, the octopus is also one of the ocean’s most intelligent creatures.
• Squid. Squids are also popular cephalopods.
• Nautilus.
• Cuttlefish.
• Flamboyant Cuttlefish.
• Giant Pacific Octopus.
• Paper Nautilus.

What are 4 orders of cephalopoda?

Classification

• †Order Belemnoidea (belemnites)
• Order Sepioidea (cuttlefishes and bottle-tailed squids)
• Order Teuthoidea (squids)
• Order Vampyromorpha.
• Order Octopoda (octopuses)

What is unique about class cephalopoda?

Cephalopoda is the most morphologically and behaviorally complex class in phylum Mollusca. Cephalopoda means “head foot” and this group has the most complex brain of any invertebrate. Cephalopods are characterized by a completely merged head and foot, with a ring of arms and/or tentacles surrounding the head.

How many animals are in the class Cephalopoda?

There are over 800 living species of cephalopods, loosely divided into two groups called clades: Nautiloidea (of which the only surviving species is the nautilus) and Coleoidea (squids, cuttlefish, octopuses, and the paper nautilus).

What is meant by Cephalopoda?

: any of a class (Cephalopoda) of marine mollusks including the squids, cuttlefishes, and octopuses that move by expelling water from a tubular siphon under the head and that have a group of muscular usually sucker-bearing arms around the front of the head, highly developed eyes, and usually a sac containing ink which …

What organisms belong to cephalopoda?

cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives.

Why is octopus grouped in cephalopoda?

Cephalopod literally means ‘head foot’ and members of this group, including octopuses, cuttlefishes, squids and nautiluses, have their foot or tentacles connected to their head, not their body. Cephalopods have the most advanced nervous system of all invertebrate animals and are active hunters.

How many animals are in the class cephalopoda?

What is meant by cephalopoda?

Why is octopus grouped in Cephalopoda?

Which part of the mollusk body contain organs?

visceral mass
The mollusk body can generally be divided into three regions: the head, the foot, and a cluster of internal organs called the visceral mass. The visceral mass includes many of the organs mentioned in the previous concepts such as the stomach, the heart, the nephridia, and the gonads.

What are the characteristics of a cephalopod?

All cephalopods have the same basic anatomy. They’re made up of a body, a head and a foot. They have a muscular casing called a mantle which contains and protects their organs. They all have arms — at least eight of them — that are attached directly to their heads, but only some species also have tentacles.

What are examples of cephalopod?

– Octopus. – Squid. – Nautilus. – Cuttlefish. – Vampire Squid.

What are cephalopods animals?

Cephalopods are a group of molluscs and very highly evolved animals. They include the squid (pictured. here), octopus, cuttlefish (sometimes called a ‘squid’), nautilus and argonauts and many extinct forms, including the giant nautiloids.

What does cephalopod mean?

Similarly, it is asked, what does cephalopod literally mean? Cephalopod literally means “head foot” in Greek, a reference to the way the cephalopod’s head connects to its many arms. The basic cephalopod body plan includes two eyes, a mantle, a funnel (also called a siphon), and at least eight arms.