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Hectocotyli are shaped in many distinctive ways, and vary considerably between species. The shape of the tip of the hectocotylus has been much used in octopus systematics. Many coleoids lack hectocotyli altogether. [6] Among Decapodiformes (ten-limbed cephalopods), generally either one or both of arms IV are hectocotylized.
Arms and buccal mass of the squid Taningia danae.As in other Octopoteuthidae, the tentacles are absent in adults. Oral view of the bobtail squid Semirossia tenera Head and limbs of the bobtail squid Rossia glaucopis Oral view of male Bathypolypus arcticus with hectocotylus on arm III (left) Cephalopod suckers and configuration of suckers on tentacular club Serrated suckers of a giant squid ...
The seven-arm octopus is so named because in males, the hectocotylus (a specially modified arm used in egg fertilization) is coiled in a sac beneath the right eye. Due to this species' thick, gelatinous tissue, the arm is easily overlooked, giving the appearance of just seven arms. However, like other octopuses, it actually has eight. [5]
Researchers have identified an extinct vampire squid-like creature that is the first of its kind with 10 functional arms. The earliest known relative of octopuses and vampire squid has been named ...
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Octopodiformes is a superorder of the subclass Coleoidea, comprising the octopuses and the vampire squid.All living members of Octopodiformes have eight arms, either lacking the two tentacles of squid (as is the case in octopuses) or modifying the tentacles into thin filaments (as in vampire squid).
As a noun, this word refers to a long, soft-bodied sea creature with eight arms and two tentacles. They closely resemble an octopus. OK, that's it for hints—I don't want to totally give it away ...
Velodona togata is a species of octopus in the monotypic genus Velodona.First described by Carl Chun in 1915, with a second subspecies discovered by Guy Coburn Robson in 1924, it was named for the distinctive membranes on its arms.