Review
doi: 10.1186/jbiol77. Epub 2008 Jun 26.Zoological detective stories: the case of the facetotectan crustacean life cycle
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- PMID:18598383
- PMCID: PMC2447532
- DOI: 10.1186/jbiol77
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Review
Zoological detective stories: the case of the facetotectan crustacean life cycle
Gerhard Scholtz. J Biol.2008.
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Abstract
The reconstruction of complete animal life cycles is sometimes a considerable problem, even though the knowledge of the full life cycle may have far-reaching evolutionary implications. A new study published in BMC Biology on artificially induced metamorphosis in an enigmatic crustacean group that was only known from larval stages sheds new light on the evolution of parasitism.
Figures
Representatives of Cirripedia. From left to right: a goose barnacle (Thoracica, Lepadidae); an Indo-Pacific giant acorn barnacle (Thoracica, Balanidae); and the externa of a parasiticSacculina(Rhizocephala) sitting under the abdomen of a crab.
Barnacles as early stages in the life cycle of geese. Left: goose barnacles attached to a drifting log. Right: medieval view of the 'goose tree' producing geese of the genusBrantafrom barnacles.
Phylogenetic relationships of Thecostraca (after [14,18]). Facetotecta is the sister-group to the rest of the Thecostraca, which comprise the Ascothoracida and Cirripedia. Despite their phylogenetic distance from Rhizocephala, the early postlarval stages (ypsigon) are very similar.
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