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Pirosomas

8/21/2014

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Imagen
Photo credit: ©Nick Hobgood
Lo que se ve en la foto no es un solo organismo, sino una colonia de tunicados del género Pyrosoma. 
Las colonias de pirosomas pueden alcanzar una longitud de 60 cm y forma un tubo rígido distintivo que puede ser incoloro, rosa, gris o azul-verde. Un extremo está cerrado y cónico, con el extremo abierto de oposición que tiene un diafragma. El tubo tiene una textura áspera debido a las papilas de los individuos que componen la colonia. A diferencia de salpas que utilizan pulsantes en la pared de su cuerpo para bombear agua, los pirosomas dependen de los cilios para mover el agua a través del cuerpo. Pirosomas son bioluminiscentes brillantes. De hecho, el nombre del género Pyrosoma se deriva del griego, Pyros (fuego) y soma (cuerpo), refiriéndose a la bioluminiscencia característica brillante de este grupo.
Fuente: libutron

Colonies of pyrosomes may reach a length of 60 cm and forms a distinctive rigid tube that may be colorless, pink, grayish or blue-green. One end is closed and tapered, with the opposing open end having a diaphragm.  The tube has a rough texture due to papillae on the individuals making up the colony. Unlike salps that use pulsing of the body wall to pump water, pyrosomes depend on cilia to move water through the body. Pyrosomes are brightly bioluminescent. In fact, the genus name Pyrosoma is derived from the Greek, pyros (fire) and soma (body), referring to the bright bioluminescence characteristic of this group.   
Source: libutron


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