Eledone

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Eledone
Eledone cirrhosa

Eledone cirrhosa

Systematics
Subclass : Octopus (coleoidea)
Superordinate : Eight-armed squid (Vampyropoda)
Order : Octopus (octopoda)
Family : Real octopus (Octopodidae)
Genre : Eledone
Scientific name
Eledone
Leach , 1817

Eledone is a small to medium sized species from the family of Real Kraken . The individual species live in the Atlantic Ocean , the Mediterranean and the Indian Ocean .

features

Drawing by Eledone moschata

anatomy

The Eledone species vary in size and have sheath lengths between 47 and 250 millimeters. The largest species, Eledone cirrhosa , reaches a total length of 55 centimeters and a weight of 1.2 kilograms.

All species of the genus Eledone have an elongated, egg-shaped coat and a series of suction cups on each tentacle . At the tips of the non-hectocotyledonous arms, these merge into two rows of fleshy papillae or lamellae. This is also a genus-specific feature. The goiter is clearly pronounced in all species and forms a branch off the esophagus.

In most species of the genus, the males have enlarged suction cups. The funnel organ has a different appearance in the individual species; it is UU- I∩I- or W-shaped.

The ligula of all species of the genus has no calm and makes up three to four percent of the arm's length. Some species have a brain-like structure in the form of a wrinkled, rounded tip instead of a ligula.

Appearance

The coloring of the individual species in the resting state differs. They have no false eyespots ( ocelles ). In all species, the skin surface is covered with fine, tightly packed warts. Like all real octopuses, Eledone species can adapt their appearance to their surroundings through a combination of different chromatophores and a change in skin texture.

distribution and habitat

The distribution of the Eledone species extends over the Atlantic Ocean and the Indian Ocean.

They were found at depths between 5 and 500 meters below sea level. Most species live at a depth of less than 300 meters. The typical habitat is made up of soft sediment substrates, but also scree and rocky reefs.

Historical systematics

Systematics

At present (2015) seven species are counted in the genus:

Individual evidence

  1. ↑ a b c d e f g h Cephalopods of the world. An annotated and illustrated catalog of cephalopod species known to date (pp. 114–115)
  2. ↑ Skin as superreflectors
  3. ↑ Octopodidae - Article at Tree of Life
  4. ↑ a b c d Worldregister of Marinespecies

Web links

Commons : Eledone  - collection of images, videos and audio files