Metamorphosis in balanomorphan, pedunculated, and parasitic barnacles: a video-based analysis.

Integrative and Comparative Biology
Jens T HøegBenny K K Chan

Abstract

Cypris metamorphosis was followed using video microscopy in four species of cirripeds representing the suspension-feeding pedunculated and sessile Thoracica and the parasitic Rhizocephala. Cirripede metamorphosis involves one or more highly complex molts that mark the change from a free cypris larva to an attached suspension feeder (Thoracica) or an endoparasite (Rhizocephala). The cyprids and juveniles are so different in morphology that they are functionally incompatible. The drastic reorganization of the body implicated in the process can therefore only commence after the cyprid has irreversibly cemented itself to a substratum. In both Megabalanus rosa and Lepas, the settled cyprid first passes through a quiescent period of tissue reorganization, in which the body is raised into a position vertical to the substratum. In Lepas, this is followed by extension of the peduncle. In both Lepas and M. rosa, the juvenile must free itself from the cypris cuticle by an active process before it can extend the cirri for suspension feeding. In M. rosa, the juvenile performs intensely pulsating movements that result in shedding of the cypris carapace ~8 h after settlement. Lepas sp. sheds the cypris cuticle ~2 days after settlement due to ...Continue Reading

Citations

Apr 26, 2012·Integrative and Comparative Biology·Marcos Pérez-LosadaKeith A Crandall
Jul 24, 2012·Integrative and Comparative Biology·John D Zardus
Jun 6, 2012·PloS One·Diego MaruzzoJens T Høeg
Jul 23, 2013·PloS One·Nick AldredAnthony S Clare
Jun 23, 2016·Biology Letters·Jennie Chien Wen LiuBenny K K Chan
Nov 23, 2016·Arthropod Structure & Development·Aleksei A Miroliubov

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