Pyrgoma cancellata   Leach,  1818 (Barnacle)
Organism information awaits expert curation
Class: Maxillopoda

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

Max. size: Carino-rostral diameter 16 mm
Max. number of radiating ridges 48

Color: Dull dirty purple

Shell oval or nearly round, rather large, nearly flat. Surface provided with prominent, broad and approximate radiating ridges fading towards orifice these ridges project at basal edge into finger-like points which are remarkable when not too much encrusted by coral. Orifice oval, rather small. Internal surface of shell smooth; sheath descending but a short distance from orifice and closely attached to walls; growth-lines on each side slightly bent downwards close to carinal end of shell and obliquely folded on lateral side, giving it an appearance of a suture of compartments. Base cup-shaped, internally furrowed conspicuously, and hollowed out on upper edge between the points where septa meet radiating ridges of shell.
Scutum elongated transversely, with adductor ridge much prolonged; adductor plate as broad as ordinary valve, extending below ordinary basal margin to a distance about as high as valve or less and projecting at rostral end strongly but not sharply; articular ridge narrow, prominent and united with adductor ridge along tergal margin. Tergum with a narrowly elongated spur furrowed externally; upper or ordinary part of valve nearly square and about one-third as long as spur; spur curved a little towards carinal side.

Synonym (s)
Pyrgoma cancellata Leach 1818
Pyrgoma cancellatum var. japonica Weltner 1897
Pyrgoma cancellatum Darwin 1854
Pyrgoma cancellata Nilsson-Cantell 1938a
Pyrgoma cancellata Hiro 1938
Pyrgoma cancellata Hiro 1937
Pyrgoma cancellata Hiro 1935a
Pyrgoma cancellata Utinomi 1958
Pyrgoma cancellata Ross and Newman 1973
Pyrgoma cancellata Newman and Ross 1976

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Tuticorin INDIA (Record: 2000)
• MALDIVES (Record: 2006)

Literature Source(s)
  • 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 -

Page last updated on:2012-05-22

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