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In a 1990 study of dermal structures in squid, Clyde F. E. Roper and C. C. Lu wrote that they were "unable to suggest a function" for the tubercles of this species, but that due to their small size and spacing they were unlikely to be involved in buoyancy or locomotion. [1]
Extant cephalopods range in size from the 10 mm (0.3 in) Idiosepius thailandicus [4] to the 700 kilograms (1,500 lb) heavy colossal squid, the largest extant invertebrate. [ 5 ] [ 6 ] Distribution
Gladius, showing measurement of rachis and vane. The gladius (pl.: gladii), or pen, is a hard internal bodypart found in many cephalopods of the superorder Decapodiformes (particularly squids) and in a single extant member of the Octopodiformes, the vampire squid (Vampyroteuthis infernalis). [1]
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 cuttlefish. [9] Each sucker is usually circular and bowl-like and has two distinct parts: an outer shallow cavity called an infundibulum and a central hollow ...
The beak of a giant squid. All extant cephalopods have a two-part beak, or rostrum, situated in the buccal mass and surrounded by the muscular head appendages. The dorsal (upper) mandible fits into the ventral (lower) mandible and together they function in a scissor-like fashion. [1] [2] The beak may also be referred to as the mandibles or jaws ...
Taningia danae, the Dana octopus squid, is a species of squid in the family Octopoteuthidae. It is one of the largest known squid species , reaching a mantle length of 1.7 m (5.6 ft) [ 3 ] and total length of 2.3 m (7.5 ft). [ 4 ]
Squid giant axon diameters do not necessarily correlate with overall body size; those of the giant squid (Architeuthis dux) are only 0.137–0.21 mm (0.0054–0.0083 in) thick. [ 173 ] Diagram showing the three major elements (red, green, and yellow) of the squid giant neuronal system.