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Information about Cephalopod Arm

A cephalopod arm differs from a cephalopod tentacle in many ways. By definition, arms have suckers along most of their length, as opposed to tentacles, which have suckers only near their ends.

An octopus has eight arms and no tentacles, while squid and cuttlefish tend to have eight arms and two tentacles.
Cephalopoda
Cuvier, 1797

Orders

Subclass Nautiloidea
  • †Plectronocerida
  • †Ellesmerocerida
  • †Actinocerida
  • †Pseudorthocerida
  • †Endocerida
  • †Tarphycerida
  • †Oncocerida

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An arm is an upper limb of the body.

Arm (or arms) may also refer to:
  • Armaments, weapons; as in Small arms, Right to bear arms
  • Eta Capricorni, a star, traditional name "Arm"

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Tentacles can refer to the elongated flexible organs that are present in some animals, especially invertebrates, and sometimes to the hairs of the leaves of some insectivorous plants. Usually, they are used for feeding, feeling and grasping.
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Sucker may refer to:
  • Sucker, also called a lollipop, a type of confectionery consisting mainly of hardened, flavoured sucrose with corn syrup mounted on a stick and intended for sucking or licking

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Octopoda
Leach, 1818

Suborders

†Pohlsepia (incertae sedis)
†Proteroctopus (incertae sedis)
†Palaeoctopus (incertae sedis)
Cirrina
Incirrina
Synonyms

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For other uses, see Squid (disambiguation).


Superconducting Quantum Interference Devices (SQUID) are very sensitive magnetometers used to measure extremely small magnetic fields, based on superconducting loops
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Sepiida
Zittel, 1895

Suborders and Families
  • †Vasseuriina
  • †Vasseuriidae
  • †Belosepiellidae
  • Sepiina

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Herod_Archelaus


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