World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0003608907
Reproduction Date:

Title: Thecostraca  
Author: World Heritage Encyclopedia
Language: English
Subject: Facetotecta, Barnacle, Ascothoracida, Crustacean, Abathescalpellum
Collection: Maxillopoda
Publisher: World Heritage Encyclopedia


A barnacle of the family Balanidae, Mission Beach, Queensland, Australia, 2001.
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Maxillopoda
Subclass: Thecostraca
Gruvel, 1905

Thecostraca are a subclass of marine invertebrates containing about 1,320 described species. Many species have planktonic larvae which become sessile or parasitic as adults.

The most important subgroup are the barnacles (infraclass Cirripedia), constituting about 1,220 known species.[1]

The subgroup Facetotecta contains a single genus, Hansenocaris, known only from the tiny planktonic nauplii called "y-larvae". These larvae have no known adult form, though it is suspected that they are parasites, and their affinity is uncertain: some researchers believe that they may be larval tantulocaridans (no larval tantulocaridans are known, so this would solve two puzzles at once).[2]

The group Ascothoracida contains about 100 species, all parasites of coelenterates and echinoderms.[3]


This article follows Martin and Davis in placing Thecostraca as a subclass of Maxillopoda and in the following classification of thecostracans down to the level of orders:[2]

Subclass Thecostraca Gruvel, 1905


  1. ^ Martin Walters & Jinny Johnson (2007). The World of Animals.  
  2. ^ a b Joel W. Martin & George E. Davis (2001). An Updated Classification of the Recent Crustacea ( 
  3. ^ Paul Schmid-Hempel (2011). "The diversity and natural history of parasites". Evolutionary Parasitology: the Integrated Study of Infections, Immunology, Ecology, and Genetics.  

External links

  • Data related to Thecostraca at Wikispecies
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.