Chirona (Striatobalanus) amaryllis   (Darwin),  1854 (Barnacle)
Organism information awaits expert curation
Class: Maxillopoda

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

Size: Fully grown shell basal diameter 45 mm; height 35 mm.

Color: Parietes striped with rosy pink longitudinal lines fading away at the base. Particularly at the rostrum, and changes into a pale yellow color. Radii oblique, covered by persistent yellowish epidermis; alae comparatively broader and bluish white.

Shell conical and smooth; orifice sub-rhomboidal; margins slightly crenate; base highly calcareous and porous.
Scutum: Triangular and longitudinally striated; growth lines prominent, ending in squarish beads along the occludent margin; articular ridge short and blunt; adductor ridge not well developed; adductor muscle pit well developed; in fully grown specimens lateral depressor muscle cavity conspicuous; absent in young specimens.
Tergum: Bears external longitudinal striae; longitudinal depression deep but closed; scutal margin considerably arched; apex prominently peaked; spur long, narrow, and slanting towards basi-scutal angle; depressor muscle crests poorly developed.
Mouth parts-Labrum: Broad and deeply notched; margin of the crest highly hairy; larger teeth situated at the angle near the notch and the other two a little away and closer to each other; lateral surfaces with obliquely directed setae.
Mandible: Highly variable; normally 5 teeth of which the first and second are distinct; the later at times bifid; third, fourth and fifth teeth much reduced; sometimes fourth and fifth fused to single tooth with many cusps; superior margin prominently arched with a row of fine hairs; inferior margin straight with serially arranged setae; body surface covered with strong short spinules some of which protrude beyond the cleft between first and second teeth.
Inner maxilla: With characteristic cutting edge with lower and upper portions stepped; lower edge protruded more prominently than the upper; upper step with a pair of long and stout spines; beneath the upper pairs a small notch usually with 5-6 minute spinules; lower step with a pair of long and stout spines above and pair of slender and short spines below, sometimes serrated at the tip; below the lower spines, a row of smaller spinules decreasing in length; twelve smaller spines in between the steps in double row; lower margin with more fine setae; in upper margin setae are rare; body surface with long and slender spinules along the margins, few projecting beyond the cutting edges.

Synonym (s)
Balanus amaryllis var. b Darwin 1854
Balanus amaryllis Hoek 1883
Balanus amaryllis Hoek 1913
Balanus amaryllis Gruvel 1905
Balanus amaryllis Pilsbry 1916
Balanus amaryllis Nilsson-Cantell 1921
Balanus amaryllis Hiro 1936
Balanus amaryllis Utinomi 1962
Balanus amaryllis Utinomi 1966
Balanus amaryllis Utinomi 1968
Balanus amaryllis Utinomi 1969
Balanus amaryllis Zevina and Tarasov 1963
Balanus amaryllis Ren and Liu 1978
Balanus amaryllis dissimilis Lanchester 1902
Balanus amaryllis forma euamaryllis Broch 1922
Balanus amaryllis forma euamaryllis Broch 1931
Balanus amaryllis forma euamaryllis Nilsson-Cantell 1932
Balanus amaryllis forma euamaryllis Nilsson-Cantell 1934a
Balanus amaryllis forma euamaryllis Nilsson-Cantell 1934b
Balanus amaryllis forma euamaryllis Nilsson-Cantell 1938a
Balanus amaryllis forma euamaryllis Daniel 1956
Chirona (Striatobalanus) amaryllis Newman and Rose 1976

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Uvari INDIA (Record: 2001)
• Tamil Nadu, Parangipettai INDIA (Record: 1996)
• Tamil Nadu, Tuticorin INDIA (Record: 1970)
• Pondicherry INDIA (Record: 1998)
• Maharashtra, Mumbai INDIA (Record: 2001)
• Tamil Nadu, Nagapattinam INDIA (Record: 2002)
• Tamil Nadu, Pazhayar INDIA (Record: 2002)
• Tamil Nadu, Chennai INDIA (Record: 2006)
• Orissa INDIA (Record: 2006)
• Goa, Marmagao INDIA (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:2012-05-21

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