- A cephalopod arm is a limb of a cephalopod, which is often treated as distinct from a tentacle, though the terms are sometimes used interchangeably1. Arms have suckers along most of their length, as opposed to tentacles, which have suckers only near their ends1. The arms of cephalopods are flexible, prehensile appendages that surround the mouth and are attached to each other near their base by a webbed structure2. The arms can be described based on side and sequence position and divided into four pairs2.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.In the scientific literature, a cephalopod arm is often treated as distinct from a tentacle, though the terms are sometimes used interchangeably, often with the latter acting as an umbrella term for cephalopod limbs. Generally, arms have suckers along most of their length, as opposed to tentacles, which have suckers only near their ends.en.wikipedia.org/wiki/Cephalopod_limbThe foot has evolved into a set of flexible, prehensile appendages, known as "arms", that surround the mouth and are attached to each other near their base by a webbed structure. The arms can be described based on side and sequence position (such as L1, R1, L2, R2) and divided into four pairs.en.wikipedia.org/wiki/Octopus
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See all on WikipediaCephalopod limb - Wikipedia
All cephalopods possess flexible limbs extending from their heads and surrounding their beaks. These appendages, which function as muscular hydrostats, have been variously termed arms, legs or tentacles. See more
Many octopus arm anomalies have been recorded, including a 6-armed octopus (nicknamed Henry the Hexapus), a 7-armed octopus, a … See more
Cephalopod limbs bear numerous suckers along their ventral surface as in octopus, squid and cuttlefish arms and in clusters at the ends of the tentacles (if present), as in squid and … See more
Wikipedia text under CC-BY-SA license Cephalopod - Wikipedia
Cephalopods are widely regarded as the most intelligent of the invertebrates and have well developed senses and large brains (larger than those of gastropods). The nervous system of cephalopods is the most complex of the invertebrates and their brain-to-body-mass ratio falls between that of endothermic and ectothermic vertebrates. Captive cephalopods have also been known to climb out of their …
Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 9 mins
Hectocotylus - Wikipedia
WEB10 rows · A hectocotylus (pl.: hectocotyli) is one of the arms of male …
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Cephalopod - Simple English Wikipedia, the free encyclopedia
WEBThe Cephalopoda (Greek meaning "head-foot") is an important mollusc class. They have bilateral symmetry, a head, and arms or tentacles. Teuthology, a branch of malacology, is the study of cephalopods. The class has two living subclasses.
Evolutionary development of the cephalopod arm armature: a …
WEBDec 20, 2021 · The cephalopod arm armature is certainly one of the most important morphological innovations responsible for the evolutionary success of the Cephalopoda. New palaeontological discoveries in the recent past afford to review and reassess origin and homology of suckers, sucker rings, hooks, and cirri.
The cephalopod arm crown: appendage formation and …
WEBSep 29, 2016 · The arm crown of modern cephalopods (coleoids) is a bilaterally symmetric structure, consisting of four pairs of prehensile arms with an additional pair of retractable cirri in Vampyroteuthis and extensible tentacles in the decabrachian cephalopods. The homologies of the arms in the cephalopod orders have not been definitively resolved.
Cephalopod origin and evolution: A congruent picture emerging …
WEBJun 17, 2011 · Cephalopods are extraordinary molluscs equipped with vertebrate-like intelligence and a unique buoyancy system for locomotion. A growing body of evidence from the fossil record, embryology and Bayesian molecular divergence estimations provides a comprehensive picture of their origins and evolution. Cephalopods evolved during the ...
Evolutionary development of the cephalopod arm armature: a …
WEBDec 20, 2021 · The cephalopod arm armature is certainly one of the most important morphological innovations responsible for the evolutionary success of the Cephalopoda. New palaeontological discoveries in the recent past afford to review and reassess origin and homology of suckers, sucker rings, hooks, and cirri.
Evolution of limb development in cephalopod mollusks …
WEBJun 18, 2019 · Cephalopod mollusks evolved numerous anatomical novelties, including arms and tentacles, but little is known about the developmental mechanisms underlying cephalopod limb evolution.
The cephalopod arm crown: appendage formation and …
WEBCephalopods are a highly derived class of molluscs that adapted their body plan to a more active and predatory lifestyle. One intriguing adaptation is the modification of the ventral foot to form a bilaterally symmetric arm crown, which constitutes a …
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