Dimophyes arctica   (Chun,  1897) (Hydrozoan)
Organism information awaits expert curation
Class: Hydrozoa

Image copyrights: Slawomir, Kwasniewski

Polygastric phase: Anterior nectophore: Upto 10 mm in length, 5 mm in breadth, with rounded apex. Only incomplete lateral ridges, not reaching apex or base, present. No ostial teeth. Somatocyst varies in length 5 mm; broad at base, tapering toward apex, or spindle shaped reaching up to half the length of the nectophore and lies close against wall of nectosac. Hydroecium characteristically shaped as “Spathe”of Arum-lily, apex slightly above level of ostium, with major portion lying below level of ostium. Mouth plate undivided, rounded with smooth edge and wide open on ventral side.
Posterior nectophore: Obsolescent, reduced in size with rounded truncated articulating surface; hydroecial groove deep proximally shallow distally, bounded by two wings. Plane of ostium vertical instead of horizontal.
Eudoxid phase: About 9 mm long. Bract with thick head pieces broadly conical, and thin, broad and long neck-shield. Large globular part of phyllocyst lies within head piece and fine basal horn within neck-shield. Gonophores about 7 mm long, without hydroecial groove, female manubrium bears 80-100 ova.

Synonym (s)
Dimophyes arctica Daniel, 1974
Diphyes arctica Chun, 1897
Diphyes arctica Chun, 1897

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic


• Bay of Bengal (Lat: 15) (Long: 90) INDIA
• Kerala, Off Kochi INDIA (Record: 1985)
• Andaman and Nicobar Islands, Andaman Islands INDIA (Record: 1962-1965)
• Bay of Bengal INDIA (Record: 1962-1965)
• Arabian Sea (Record: 1962-1965)

Literature Source(s)
  • Daniel, R (1985) Fauna of India and the adjacent countries (Coelenterata: Hydrozoa: Siphonophora) ZSI 440 pp Available at - NIO, Goa
  • Zoological Survey of India (Eds) (1991) Animal resources of India (Protozoa to Mammalia) ZSI 1-694 Available at - NCL, Pune
  • Hussain, SM Brief report on biodiversity in the coastal areas of Pakistan p 113
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Sealifebase Available at - http://www.sealifebase.org/

Page last updated on:2010-06-16

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