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Gran bellota de mar, Balanus de tres filos

Balanus trigonus

Description:

Los cirrípedos (Cirripedia) son una infraclase de crustáceos maxilópodos denominados comúnmente percebes, incluyendo la bellota de mar y la anatifa. De forma similar a un volcán. Presentan seis placas laterales, levemente separadas en la parte superior. Cada placa es de color rosáceo, con varias crestas verticales. El par más largo cierra la abertura bucal. Alcanzan los 2 centímetros de ancho. Denominado trigonus por ser triangular la apertura superior de la concha. Bajo el agua, el animal abre el caparazón y saca de entre sus cubiertas dos apéndices ramificados que baten regularmente las aguas para captar alimento. Vive adherido a superficies de conchas. Es muy cosmopolita y se puede adherir a seres vivos, desde conchas a cetaceso e incluso los cascos de los barcos.

Habitat:

Sobre la cocha de un mejillón procedente de Galicia (España). En un domicilio particular.

Notes:

Balanus perforatus is a cirripedia with a base reaching 3 cm in diameter and up to 5 cm for deeper specimens. The external plates are vertically ribbed. Their pointed ends as well as the conical organization of the plates evoke the form of a small volcano. They are greyish with shades of purple or pink. The operculum that closes the upper aperture is depressed inside the cone formed by the plates. This operculum consists of two pairs of movable plates that open to allow the cirri out so that the barnacle could catch food. In case of emergency or during emersed periods, the operculum is kept hermetically closed thanks to a brown or purple flap with blue and white patches. The common barnacle generally lives in groups attached to rocks or immersed structures such as ships' bottom. It is found from surface to 20 meters deep in the Atlantic Ocean from West Africa to Wales, in the English Channel and in the Mediterranean Sea.

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12 Comments

eulalia rubio
eulalia rubio 8 years ago

Gracias, Isabela!

Isabela
Isabela 8 years ago

Qué vídeo tan interesante! What a fantastic video!

courtneyhitson
courtneyhitson 9 years ago

Great pictures and video! Thanks for sharing!!

eulalia rubio
eulalia rubio 9 years ago

Thanks ArgyBee and Leuba.

Leuba Ridgway
Leuba Ridgway 9 years ago

never seen it in action - thanks for the video. Also, very good photos.

Mark Ridgway
Mark Ridgway 9 years ago

Great sequence - thank you very much!

eulalia rubio
eulalia rubio 9 years ago

Gracias, mariajo.

mariajo
mariajo 9 years ago

Muy bueno

eulalia rubio
eulalia rubio 9 years ago

You're welcome.

Saarbrigger
Saarbrigger 9 years ago

Thanks for these intresting infos.

eulalia rubio
eulalia rubio 9 years ago

Saarbrigger: I have copied a text in English.

Saarbrigger
Saarbrigger 9 years ago

It would be great to understand it and learn something abiut it :-(.

eulalia rubio
Spotted by
eulalia rubio

Valencia, Comunitat Valenciana, Spain

Spotted on Nov 19, 2011
Submitted on Nov 19, 2011

Spotted for Mission

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