Ceratocymba leuckarti   (Huxley,  1859) (Hydrozoan)
Organism information awaits expert curation
Class: Hydrozoa

Polygastric phase: Anterior nectophore: Laterally flattened, rectangular in side view; 4.7 mm in length, 3 mm in breadth and 2 mm in thickness; not apically produced into a pointed apex. Apical facet flat, cutting dorsal and ventral facets nearly at right angles; apical and dorsal facets rectangular in shape; ventral facet narrow, ending in a pointed tip at base; lateral facets incompletely and unequally divided into two by incomplete lateral ridges. Basal 2/3rd of all ridges serrated. Dorsal ridges and lateral facets end in pointed serrated teeth around ostium of nectosac. Nectosac (3.5 mm long), hydroecium (3.85 mm long), and somatocyst (2.6 mm long) parallel to each other with apices at same level.

Posterior nectophore: Nearly 2 ½ times as long as anterior nectophores-11.83 mm long-laterally flattened, slender, fragile. Dorsal ridge vestigeal, ending in a tooth at ostium; left lateral ridge displaced toward dorsal side, both ridges ending in teeth near dorsal tooth. Hydroecium open, deep; hydroecial wings broad; right hydroecial wing thickned at edge bearing 5-6 comb-teeth on inner apical side; with 5-6 denticulations at ostial end; ventral teeth slightly unequal in size. Apex of nectophore produced into thin elongated apophysis fitting into deep hydroecium of anterior nectophore. Basal end of ridges serrated.

Eudoxid phases: Bract 5 mm in length; 3.75 mm broad, dorso-ventrally flattened, with 5 facets. Apical and basal facets flat, rectangular in shape; upper convex side with 2 ridges, median dorsal, and left lateral ridges prominent and complete and asymmetrical. Phyllocyst with 3 branches-two thread-like thin branches directed apically toward apical angles of bract and a thick branch lying below median dorsal ridge, with distal tip curved upwards. Bracteal cavity not very deep, conical in shape.

Gonophore: With 5 ridges- dorsal ridge small and vestigeal ending in dorsal tooth; two lateral ridges complete, originating from apex of nectosac and ending in teeth at base; ventral ridges form edges of expanded hydroecial wings and end in teeth. Basal ends of ridges serrated. Two gonophores in an eudoxid are mirror images of each other with peg-like apophysis.

Synonym (s)
Abyla leuckarti Huxley, 1859
Ceratocymba leuckarti Daniel, 1974

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic, Coastal


• Bay of Bengal (Lat: 15) (Long: 90) INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA (Record: 1962-1965)
• Bay of Bengal INDIA (Record: 1962-1965)
• Tamil Nadu, Chennai Coast INDIA
• Lakshadweep (Lat: 8.28) (Long: 72.95) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 18.7) (Long: 70.1) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 15.28) (Long: 73.18) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 15.25) (Long: 73.16) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 18.7) (Long: 70.36) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 18.7) (Long: 70.86) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 20) (Long: 71) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 20.93) (Long: 68.83) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 20.48) (Long: 70.06) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 20.33) (Long: 70.51) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 18.5) (Long: 70) INDIA (Record: 01/1962-12/1963)
• West Coast (Lat: 15.45) (Long: 71.36) INDIA (Record: 08/12/1963)
• South West Coast INDIA
• Lakshadweep Sea INDIA
• West Coast 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
  • 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/
  • Dr. Ramesh, R; Dr. Nammalwar, P and Dr. Gowri, VS (2008) Database on coastal information of Tamil Nadu Report Submitted to Environmental Information System (ENVIS) Centre, Department of Environment, Government of Tamil Nadu Institute for Ocean Management, Anna University, Chennai, Tamil Nadu. Available at - http://tnenvis.nic.in/PDF/coastal%20data.pdf
  • 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 (1983) Quantitative and seasonal abundance of siphonophores along the southwest coast of India and the Laccadive sea Journal of marine biological association of India The marine biological association of India 25(1&2) 17-40 Available at - NIO, Goa
  • 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
  • Boltovskoy, D (Ed.) Zooplankton of the South Atlantic Ocean Marine Species Identification Portal Available at - http://species-identification.org/species.php?species_group=Zsao&menuentry=inleiding

Page last updated on:2011-09-08

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