Conchoderma virgatum   (Spengler,  1790) (Barnacle)
Organism information awaits expert curation
Class: Maxillopoda

Image copyrights: Ocean Science and Technology Cell, CUSAT, Kochi

Externals and shell plates: Capitulum with 2 or 3 longitudinal purple bands on each side that extends into the peduncle; capitulum with 5 reduced plates; carina slightly arched in the middle and reaches about the basal tip of tergum. Carina is without a basal fork or knob; the inwardly directed carinal lobe is slightly broader and shorter than the other 2 lobes bordering the occludent margin; tergum concave internally, apices curved inwards and scutum three lobed.

Prosoma: Six filamentary appendages on each side, two on posterior margin of base of cirrus I, one on base of each pedicle of cirri III-V. Appendages on posterior cirri quite short. Caudal appendages less than half the height of basal segment of the pedicle of cirrus VI. Segments of rami of cirrus II-Vi bear numerous setae on lateral and anterior faces, particularly in anterior ramus of cirrus II. Intermediate segments of cirrus VI have 5 pairs of setae on anterior face, with short setae between bases of pairs and laterally near bases of distal pair.

Mouth pairs: (i) Mandible: bears 6 teeth.
(ii) Labrum: broad and fringed profusely with setae.
(iii) Inner maxilla: with 5 steps with numerous fine setae on the cutting edge.
It attaches to ships and driftwood as well as to various animals like fishes, sea snakes, decapods crustaceans and parasitic copepod Penella.

Synonym (s)
Conchoderma virgata Darwin 1851
Conchoderma virgatum Hoek 1883
Lepas virgata Spengler 1790

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic


• Tamil Nadu, Chennai (Lat: 13.09) (Long: 80.29) INDIA
• Tamil Nadu, Tharangambadi (Lat: 11.03) (Long: 79.86) INDIA (Record: 02/09/1973)
• Orissa, Puri INDIA
• Tamil Nadu, Tharangambadi INDIA
• Tamil Nadu, Pulicat Lake INDIA

Literature Source(s)
  • Mohan RSL; Dey, SC and Bairagi, SP (1998) On a resident population of the Ganges river dolphin, Platanista gangetica Journal of the Bombay Natural History Society 95(1) 39820
  • Hussain, SM Brief report on biodiversity in the coastal areas of Pakistan p 113
  • Fernando, SA (2006) Monograph on Indian Barnacles Ocean science and technology Cell, Kochi 9-199 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • 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 -
  • Raj, PJS (2006) Macro fauna of Pulicat lake NBA bulletin No.6 NBA Available at -

Page last updated on:2011-03-03

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