cirrate การใช้

• It also shares the inclusion of an internal cirrate octopods.
• In cirrate octopods suckers and cirri run, alternating, the entire length.
• This form has been interpreted as a cirrate octopus.
• Cirrate octopuses are noteworthy for lacking ink sacs.
• Each of the eight extant cirrate genera is characterised by a distinct shell morphology:
• Cirrate octopuses have a two fins on their head, while their sister suborder Incirrina has neither.
• The cirrate shell is quite unlike that of any other living cephalopod group and has its own dedicated set of descriptive terms.
• The incirrate octopuses are distinguished from the cirrate octopuses by their absence of internal shell, generally reducing their ability to squeeze into small spaces.
• These cirrate species are often free-swimming and live in deep-water habitats, while incirrate octopus species are found in reefs and other shallower seafloor habitats.
• The comparatively simple shells of Opisthoteuthidae and Stauroteuthidae are thought to approximate the stylets of incirrates are evolutionarily derived from the lateral wings and horns of the cirrate shell.
• "Vampyroteuthis " shares its eight cirrate arms with the Cirrata, in which lateral cirri, or filliments, alternate with the suckers . " Vampyroteuthis " differs in that suckers are present only on the distal half of the arms while cirri run the entire length.
• The suborder contains the classic " cirrate octopuses by the absence in the former of the " cirri " filaments ( found with the suckers ) for which the cirrates are named, as well as by the lack of paired swimming fins on the head, and lack of a small internal shell ( the " shell " of " Argonauta " species is not a true shell, but a thin calcite egg case ).