Platylepas hexastylos   (Fabricius,  1798) (Barnacle)
Organism information awaits expert curation
Class: Maxillopoda

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

Size: Basal diameter: 7.5 mm

Color: Yellowish due to the external membrane in which it is imbedded. When the membrane is removed it is lustrous white.

Greatly depressed and oval; orifice also oval with the external surface sculptured with concentric ridges.

Shell: The porous parietes of each compartment bear a deep internal midrib which gives support to the membranous basis. Radii very narrow with alae smooth. The scuta and terga are elongated and narrow.

I cirri- 8,6; II cirri- 9,8; III cirri- 11,10; IV cirri- 24,25; V cirri- 27,27; VI cirri- 27,27.

The first segment of the anterior ramus of the first cirrus is very long. Each segment of the fourth, fifth and sixth pairs of cirri bear four pairs of spines.

Mouth parts: Labrum with deep notch and 3 teeth on either side.

Inner maxilla: The upper end of the cutting edge is slightly depressed and bears a pair of long spines; and there are three pairs of smaller spines and a simple long spine along the straight cutting edge.

Mandible: The mandible is five toothed including the lower angle; between the second and the third and between the third and fourth teeth there are two very small teeth. The lower angle bears three spines.

Synonym (s)
Lepas hexastylos O. Fabricius 1798
Platylepas bisexlobata 1854
Platylepas bisexlobata 1912
Platylepas hexastylos Monroe and Limpus 1979
Platylepas hexastylos 1916
Platylepas hexastylos 1930
Platylepas hexastylos 1937
Platylepas hexastylos 1955

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Chennai (Lat: 13.09) (Long: 80.29) INDIA
• Tamil Nadu, Perumanal 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
  • 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 -

Page last updated on:2010-07-14

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