Cleidochasma biavicularium   (Canu & Bassler,  1929) (Bryozoan)
Organism information awaits expert curation
Class: Gymnolaemata

Size (Zooecium): Length 530 µ; breadth 475 µ.

Zoarium erect, branching and escharan. Zooecia with regularly tuberculated convex front, arranged in longitudinal rows alternately. Zooecia separated by deep grooves. Marginal pores present. Key-hole shaped orifice with slightly narrow sinus. Peristome very low and smooth. Operculum with strong marginal sclerite. Avicularia often paired, placed on swollen projections one of which occupies the lateral sub-oral position and the other one lateral distal or parallel to the orifice. Lateral avicularium with slightly rounded rostrum and with triangular mandible, the sub-oral one with slightly pointed rostrum and long setiform mandible projecting beyond the tip of the rostrum. In both the avicularia, the calcareous bar complete. Globose perforated ovicells, with small tubercles, placed above the operculum. No rootlets noticed.

Synonym (s)
Gemellipora biavicularia Canu and Bassler, 1929
Cleidochasma biavicularium Harmer, 1957
Cleidochasma biavicularium Menon and Nair, 1967

Common Name (s)
Economic Importance and Threats



• Kerala, Off Kochi INDIA (Record: 30/09/1958) (Depth: 60 mts)
• Kerala, Kochi INDIA (Record: 1994)

Literature Source(s)
  • Menon, NR and Menon, NN (2006) Taxonomy of Bryozoa from the Indian EEZ. A monograph Ocean Science and Technology Cell on Marine Benthos, Kochi and Centre for Marine Living resources and Ecology, Kochi 263 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Menon, NR and Nair, NB (1967) The ectoproctous bryozoans of the Indian waters Journal of the marine biological association of India The marine biological association of India 9(2) 430-432 Available at - NIO, Goa

Page last updated on:2011-06-01

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