Agalma haeckeli   Bigelow,  1911 (Hydrozoan)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Cnidaria
Class: Hydrozoa
Order:Siphonophorae
Family:Agalmatidae

Description
Pneumatophore: Ovate or pyriform, with purple pigment at apical half and yellow at lower half; with 8 equidistant longitudinal lines dividing pericystic cavity into 8 radial pouches.

Nectosome: With 4 pairs of nectophores.

Nectophores: 30 X 20 mm in size, with two triangularly shaped lateral wings; nectosac lying at basal half of nectophore. Ostium with 3 scarlet colored pigment spots at velum at junction of dorsal and lateral radial canals.
Siphosome: Same size as nectosome, stiff densely covered with very thick large bulged bracts, giving a globular (50 mm in diameter) in appearance. Concave inner surfaces of bracts forming a hydroecium for retraction of cormidia.

Cormidia: Dissolved type, with 8 or more gastrozooids and several palpons. Gastrozooids with long pedicels, basigaster small, stomach with four double rows of red-brown liver glands.

Tentacle: With companulate, involucrate tentilla; 7-8 spira-turns in cnidoband, purple colored; tricornuate with spindle shaped central ampulla and a pair of slender lateral horns. Tentacles of palpons simple.
Gonodendra: Occur at bases of palpons, gonophores well developed with umbrella and radial canals; female gonophores companulate with single ovum surrounded by a net work of spadicine canals. Male gonophore sub-cylindrical, purple in color; with central spadix.


Synonym (s)
Agalma eschscholtzii Haeckel, 1888
Agalma haeckeli Bigelow, 1911
Agalma haeckeli Totton, 1965

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Pelagic, Coastal

Biogeography


• Bay of Bengal (Lat: 15) (Long: 90) INDIA
• SRI LANKA (Record: 1962-1965)
• Bay of Bengal (Record: 1962-1965)
• 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
  • 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
  • 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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