Sepioteuthis arctipinnis [Status Unaccepted]   Gould,  1852 (Squid)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Mollusca
Class: Cephalopoda
Order:Myopsida
Family:Loliginidae

Image copyrights: Sarvesan, R

Description
Colour: Whitish in fresh condition with greenish tinge surrounding the eyes.

The mantle is elongate, conico-cylindrical in outline, tapering to a blunt point behind; anterodorsally the mantle extends over the nuchal region into a round point, and anteroventrally below the funnel it bears a deep emargination; fins, attached on either side traversing almost all along the entire length, are large, thick and muscular; the fins are narrow in front, gradually widening behind and broadest about the posterior third of the body beyond which they narrow down rapidly and meet each other at the posterior extremity; head slightly narrower than the body; eyes large and prominent; funnel large, broadest at the base and provided with a valve. Arms unequal in length. The second and third pair of arms are prominently keeled; suckers of all arms are arranged in two alternating rows; the horny rings of the suckers equipped with teeth on their outer margins; In the males the left ventral arm is hectocotylized by the modification of suckers and pedicles of the distal half of the arm. Proximally there are about 20 normal suckers followed by 6 pairs of enlarged pedicles with smaller suckers. Beyond this, on the distal portion of the arm, suckers are absent and the pedicles are enlarged into fleshy conical papillae; dorsal row of pedicles slightly larger than the ventral rows. Tentacles moderately long and the stalks are slightly laterally compressed; tentacular clubs large and provided with trabeculate protective membranes on the sides. The club suckers are quadriserially arranged, suckers of medial rows larger than those of the margial rows; chitinous rings of the club suckers are denticulate. Mouth surrounded by seven lappets; the tips of the lappets possess minute suckers with homy rings having about 25 blunt teeth. The gladius is chitinous and lanceolate in shape and colourless. Chromatophores present all over the body excepting the ventral surface of fins. On the dorsal surface of the mantle and fins grey coloured transverse streaks are found which are distinct in males.


Synonym (s)

Common Name (s)
• Ekkikanavai (Tamil)
• Kundal Kahavai (Tamil)
Economic Importance and Threats

Ecology
Prey:  Smaller fishes and sometimes on crustaceans consisting of crabs and prawns. They also consume smaller individuals of their own species and fingerlings of fishes like Sardinella spp., Syngnathoides bimaculatus, Atherina forskalii, Pelates quadrilineatus, Upeneus vittatus, Therapon puta. Gerres poeti. Leiognathus spp.

Biogeography


• Palk Bay (Lat: 9.5) (Long: 79.25) INDIA
• Palk Bay INDIA
• Tamil Nadu, Gulf of Mannar INDIA

Literature Source(s)
  • Zoological Survey of India (Eds) (1991) Animal resources of India (Protozoa to Mammalia) ZSI 1-694 Available at - NCL, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Sarvesan, R (1974) Cephalopods The commercial molluscs of India Bulletin Of Central Marine Fisheries Research Institute CMFRI, Cochin 25 63-83 Available at - http://eprints.cmfri.org.in/645/1/R_Sarvesan.pdf
  • Jones, S (1969) The molluscan fishery resources of India Proceedings of the Symposium on Mollusca CMFRI 906-918 Available at - http://eprints.cmfri.org.in/2371/1/Article_26.pdf

Page last updated on:2012-11-23

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