Hippopodius hippopus   Forsskal,  1776 (Hydrozoan)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Cnidaria
Class: Hydrozoa
Order:Siphonophorae
Family:Hippopodiidae

Image copyrights: Animal Pictures Archive

Description
Nectophore: Number in each colony varies from a few to several pairs. Larval nectophore caducous, replaced by series of secondary heteromorph ones retained throughout life. Definitive nectophore 21.5 mm wide, horse-shoe shaped with four rounded smoky colored knobs, forming an arch above ostium. Apical semi-circular facet smooth edged, with a cleft below nectosac; shape and space between clefts varies according to age. Lateral radial canals arise from dorsal radial canal near upper margin of nectosac. Large rete mirabele (of unknown function) in ventral radial canal, opaque, large, rounded, square bilobed or pear shaped in younger nectophores; very much reduced, thin, cigar-shaped or absent in older nectophores.

Somatocyst long, thin, thread-like directed towards apical facet almost to apex of nectophore. Hydroecium dome-shaped, deep, possessing a younger nectophore, which in turn may have a still younger nectophore within its hydroecium. Hydroecium of all nectophores form a narrow cylindrical tube for retraction of stem and cormidia.

Stem: Upper part of stem possessing nectophore - nectosome - is deflexed, curved around lower part of stem - siphosome - in wide spiral turns. Gastrozooids at regular intervals, pink in color, pedicellate, with sub-cylindrical basigaster, large stomach, and highly retractile proboscis. Tentacles very long, bearing many long lateral tentilla; with yellow ellipsoidal cnidosacs; cnidoband curved round till its apical end lies near base, with long terminal filament; cnidoband with large four to six ensiform (cigar-shaped) nematocysts at base and many narrow elongated ones at lateral sides.

Gonophores: Both male and female gonophores occur together in bunches in each cormidum at base of gastrozooid; pedicellate; manubria of gonophores protrude freely from ostia of little medusae; female manubrium bears 8-12 large eggs.


Synonym (s)
Gleba hippopus Forskal, 1776
Hippopodius hippopus Bigelow, 1911
Hippopodius hippopus Daniel, 1974
Gleba hippopus Forskal, 1775
(Basionym)
Gleba hippopus Forskal, 1775

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Pelagic, Coastal

Biogeography


• Bay of Bengal (Lat: 15) (Long: 90) INDIA
• Bay of Bengal INDIA (Record: 1962-1965)
• Arabian Sea INDIA (Record: 1962-1965)
• Andaman and Nicobar Islands, Andaman Islands INDIA (Record: 1962-1965)
• INDIA (Record: 1962-1965)
• Westcoast (Lat: 15.16) (Long: 72.68) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 16.7) (Long: 71.96) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 18.7) (Long: 70.36) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 20) (Long: 69.5) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 20) (Long: 69.25) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 21.1) (Long: 69.05) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 18.5) (Long: 70.43) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 17) (Long: 71.5) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 10.95) (Long: 75.11) INDIA (Record: 01/1962-12/1963)
• Westcoast (Lat: 9.51) (Long: 74.31) INDIA (Record: 19/12/1963)
• Westcoast (Lat: 12.46) (Long: 73.53) INDIA (Record: 21/12/1963)
• West Coast INDIA
• Lakshadweep Sea INDIA
• Bay of Bengal INDIA

Literature Source(s)
  • Daniel, R (1985) Fauna of India and the adjacent countries (Coelenterata: Hydrozoa: Siphonophora) ZSI 440 pp Available at - NIO, Goa
  • Hussain, SM Brief report on biodiversity in the coastal areas of Pakistan p 113
  • Integrated Taxonomic Information System (ITIS) Available at - http://www.itis.gov.
  • Daniel, R and Daniel, A (1969) Siphonophora collected during the 35th cruise of the R. V. VITYAZ in the eastern part of the Indian Ocean Symposium on Indian Ocean, Part II 571-574 Available at - Library, CAS, Parangipettai
  • 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/
  • Animal Photo Album Available at - http://www.animalpicturesarchive.com/
  • Rengarajan, K (1973) Siphonophores obtained during the cruises of R. V. Varuna from the west coast of India and the Laccadive Sea Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin, India 15(1) 125-129 Available at - http://eprints.cmfri.org.in/1580/1/Rao_125-259.pdf
  • Rengarajan, K (1975) Distribution of siphonophores along the west coast of India and the Laccadive sea Journal of the marine biological association of India The marine biological association of India 17(1) 56-72 Available at - NIO, Goa
  • Jitlang, I; Pattarajinda, S; Mishra, R and Wongrat, L (2007) Composition, Abundance and Distribution of Zooplankton in the Bay of Bengal The Ecosystem-Based Fishery Management in the Bay of Bengal 65-92 Available at - http://map.seafdec.org/downloads/BIMSTEC/010-Zooplankton-Issaporn.pdf

Page last updated on:2011-06-22

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