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Barnacles and their relatives

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taxon links [up-->]Cirripedia [down<--]Crustacea Interpreting the tree
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The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.

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Containing group: Crustacea

Other Names for Thecostraca


Grygier, M. J. 1987. Classification of the Ascothoracida (Crustacea). Proceedings of the Biological Society of Washington 100:452-458.

Grygier, M. J. 1987. Reappraisal of sex determination in the Ascothoracida. Crustaceana 52:149-162.

Grygier, M. J. 1987. Nauplii, antennular ontogeny, and the position of the Ascothoracida within the Maxillopoda. Journal of Crustacean Biology 7:87-104.

Grygier, M. J. 1987. New records, external and internal anatomy, and systematic position of Hansens Y larvae Crustacea. - Maxillopoda: Facetotecta. Sarsia 72:261-278.

Grygier, M. J. 1996. Classe des Thécostracés (Thecostraca Gruvel, 1905). Sous Classe des Facetotecta (Facetotecta Grygier, 1985). Pages 425-432 in Traité de Zoologie, Vol. 7 (2), Crustacés: Géneralités (suite) et systématique (1re partie). Forest, J., ed. Masson, Paris.

Høeg, J. T. and G. A. Kolbasov. 2002. Lattice organs in y-cyprids of the Facetotecta and their significance in the phylogeny of the Crustacea Thecostraca. Acta Zoologica 83:67-79.

Martin, J. W. and G. E. Davis. 2001. An updated Classification of the Recent Crustacea. Natural History Museum of Los Angeles County Science Series 39. Los Angeles, CA.

Pérez-Losada, M., J. T. Høeg, G. A. Kolbasov, and K. A. Crandall. 2002. Reanalysis of the relationships among the Cirripedia and the Ascothoracida and the phylogenetic position of the Facetotecta (Maxillopoda: Thecostraca) using 18S rDNA sequences. Journal of Crustacean Biology 22:661-669.

Spears, T., L. G. Abele, and M. A. Applegate. 1994. Phylogenetic study of cirripedes and selected relatives (Thecostraca) basedon 18S rDNA sequence analysis. Journal of Crustacean Biology 14:641-656.

Title Illustrations
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Scientific Name Lepas anatifera
Location causeway between Worm's Head and the Gower mainland, Wales
Specimen Condition Live Specimen
Source things (goose barnacles) close up
Source Collection Flickr
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 2.0.
Copyright © 2007 pshab
Scientific Name Synagoga sp. (probably undescribed) on Antipathella
Location Azores
Comments One of the rare free-living genera in this group (the others are endoparasites).
Specimen Condition Live Specimen
Identified By William Newman
Copyright © Peter Wirtz
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Citing this page:

Tree of Life Web Project. 2002. Thecostraca. Barnacles and their relatives. Version 01 January 2002 (temporary). http://tolweb.org/Thecostraca/6251/2002.01.01 in The Tree of Life Web Project, http://tolweb.org/

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Each ToL branch page provides a synopsis of the characteristics of a group of organisms representing a branch of the Tree of Life. The major distinction between a branch and a leaf of the Tree of Life is that each branch can be further subdivided into descendent branches, that is, subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

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