Macrochlaena winckworthi

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Macrochlaena winckworthi
Systematics
Subclass : Octopus (coleoidea)
Superordinate : Eight-armed squid (Vampyropoda)
Order : Octopus (octopoda)
Family : Real octopus (Octopodidae)
Genre : Macrochlaena
Type : Macrochlaena winckworthi
Scientific name of the  genus
Macrochlaena
Robson , 1929
Scientific name of the  species
Macrochlaena winckworthi
( Robson , 1926)

Macrochlaena winckworthi is the only species of the genus Macrochlaena from the family of the real octopus .

features

Macrochlaena winckworthi is a small species with a stocky body shape. It reaches a total length of 93 millimeters. The head is relatively flush and has a spherical jacket , which can be up to 33 millimeters long. The body is highly flexible. This allows these octopuses to squeeze through narrow openings.

The skin color ranges from reddish brown to purple. However, like all Octopodidae, Macrochlaena winckworthi can adapt its color to its surroundings. The skin is relatively smooth. The transparent webbing is deep and covers a third of the arms. The webbed feet are different in length. The sides run a little deeper.

The arms are short and reach about 1.5 to 2.5 times the length of the coat. The tentacles are of different lengths, with the side arms being slightly longer than the rest. There is no autonomy for certain parts of the arms. The suction cups are arranged in two rows. Their diameter is 3.6 to 6.9% of the length of the jacket. There are around 65 suction cups on a normal arm. Macrochlaena winckworthi , like all octopuses, in contrast to other cephalopods - such as squids and dwarf squids - has eight instead of ten arms. In the males, the third arm from the right is the hectocotylus . A tentacle that is used for fertilization in cephalopods.

The radula is divided into nine elements. It has seven rows of teeth and two edge plates.

distribution

Macrochlaena winckworthi occurs in the North Indian Ocean and on the southeast coast of India .

Systematics

The species was first described in 1926 as Octopus winckworthi by the British zoologist Guy Coburn Robson . In 1929 Robson described a separate genus for this species of octopus.

Individual evidence

  1. ↑ a b c d e CEPHALOPODS OF THE WORLD AN ANNOTATED AND ILLUSTRATED CATALOG OF CEPHALOPOD SPECIES KNOWN TO DATE (p.144)
  2. ^ KC Vaught: A classification of the living Mollusca . American Malacologists, 1989, ISBN 0-915826-22-4
  3. ↑ World Register of Marine Species
  4. ^ GC Robson: A Monograph of the Recent Cephalopoda. Based on the collections in the British Museum, Natural History. Part I, Octopodinae, London 1929, pp. 193-195

literature

  • MD Norman & FG Hochberg: The current state of Octopus taxonomy. Phuket Marine Biological Center Research Bulletin, 66, pp. 127-154, 2005
  • GC Robson: A Monograph of the Recent Cephalopoda. Based on the collections in the British Museum, Natural History. Part I, Octopodinae, London 1929, pp. 193–195 (first description of the genus)

Web links

  • P. Bouchet: Macrochlaena winckworthi . In: MolluscaBase , 2015. Accessed through: World Register of Marine Species, 2013–2015, accessed October 4, 2015