Chelonibia testudinaria   (Linnaeus,  1758) (Barnacle)
Organism information awaits expert curation
Class: Maxillopoda

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

Size: Basal diameter 45 mm

Color: Shell dirty white

Shell conical and depressed with broad oval outline; parietes broad, very thick and strong; radii narrow with deeply notched radial grooves on both sides; alae broad and oblique with internal transverse septa; rostrum larger than carina; lateral and carino lateral compartments almost equal in size; externally, the faint longitudinal furrows on the rostrum and the rostrolaterals with distinct longitudinal furrows on the inner surface of the rostrum; basis membranous and when removed from the host usually breaks off; orifice of the shell not completely covered by the opercular valves; yellow, hard and horny opercular membrane, considerably extend between opercular valves and the margin of the orifice.

Scutum: Narrow and elongated with distinct growth lines along the basal margin; articular portion slightly depressed with oblique ridges; adductor muscle depression deep; longitudinal striae on basal margin distinct.

Tergum: Broader and triangular with broadly truncated summit; carinal margin deflected; external furrow near carinal margin distinct; projection near basal margin either indistinct or absent; internal surface of tergum smooth excepting feebly developed articular ridge and obliquely striated furrow.

Mouth parts: Labrum: With highly hairy transverse crest and a shallow median notch; a row of 25-30 closely packed pointed teeth reducing in size from middle line outwards; numerous short, obliquely directed setae on the lateral surface of the labrum.

Mandible: Five teeth on the cutting edge; fourth and fifth teeth with strong and sharp spinules of which about 15-20 prominently project beyond the fifth tooth; lower margin with numerous fine setae; body surface with fine spines just below the upper and cutting edges; characteristically the edges of third, fourth and fifth teeth are weakly sinuated; some specimens with an extra tooth between second and third teeth.

Inner maxilla: With straight cutting edge; lower angle distinctly arched; spines on the cutting edge separable into three groups; the apical, with two long and stout spines; the central, with 20-25 slender spines, few of which equally long as the upper pair; the basal, with shorter and slender spines with pectinated edges, fine setae on upper and lower margins; with short setae along the lower edge of the upper margin.

Synonym (s)
Lepas testudinaria Linnaeus, 1758
Chelonibia testudinaria Darwin, 1854
Chelonibia testudinaria Pilsbry, 1916
Chelonibia testudinaria Nilsson-Cantell, 1938a

Common Name (s)
Economic Importance and Threats

Habitat:  Estuarine, Coastal


• Andaman and Nicobar Islands, Andaman Islands (Lat: 12.5) (Long: 92.75) INDIA
• Tamil Nadu, Chennai (Lat: 13.09) (Long: 80.29) INDIA
• West Bengal, Sundarbans (Lat: 21.5) (Long: 88.17) INDIA
• Tamil Nadu, Periyamuttam INDIA
• Tamil Nadu, Tuticorin INDIA
• Tamil Nadu, Parangipettai INDIA
• Tamil Nadu, Kilakarai INDIA
• Tamil Nadu, Krusadai Island INDIA
• Maharashtra INDIA
• West Bengal, South 24 Parganas INDIA

Literature Source(s)
  • NillssonCantell, CA (1938) Cirripedes from the Indian Ocean in the collection of the Indian Museum, Calcutta Memoirs of the Indian Museum The Manager of Publications, Delhi 13 29587 Available at - NIO, RC, Kochi
  • Mandal, AK and Nandi, NC (1989) Fauna of Sundarban mangrove ecosystem, West Bengal, India Fauna of Conservations 3 35431 Available at - NIO, Goa
  • 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 -
  • Roy, MK (2010) Diversity and Distribution of Crustacea Fauna in wetlands of West Bengal Journal of Environment and Sociobiology Social Environmental and Biological Association, Kolkata, India 7(2) 147-187 Available at - NIO,Goa

Page last updated on:2011-10-25

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