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Calcarea

Overview page. Subjects: Earth Sciences and Geography — Zoology and Animal Sciences.

; phylum Porifera)

A class of marine sponges that have a skeleton of calcareous spicules. Forms displaying leucon structure are common, and sycon and ascon forms also occur....

See overview in Oxford Index

Calcarea

Overview page. Subjects: Earth Sciences and Geography — Zoology and Animal Sciences.

; phylum Porifera)

A class of marine sponges that have a skeleton of calcareous spicules. Forms displaying leucon structure are common, and sycon and ascon forms also occur....

See overview in Oxford Index

Calcarea

Edited by MICHAEL ALLABY.

in A Dictionary of Earth Sciences

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Earth Sciences and Geography. 47 words.

A class of sponge, ranging from Cambrian to Recent, in which the skeleton is made entirely of calcareous spicules which

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Calcarea

Edited by Michael Allaby.

in A Dictionary of Geology and Earth Sciences

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Earth Sciences and Geography. 47 words.

A class of sponge, ranging from *Cambrian to Recent, in which the skeleton is made entirely of calcareous *

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Calcarea

Michael Allaby.

in A Dictionary of Zoology

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Zoology and Animal Sciences. 47 words.

A class of marine sponges that have a skeleton of calcareous spicules. Forms displaying leucon structure are common, and

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Calcarea

Edited by Michael Allaby.

in A Dictionary of Zoology

January 2014; p ublished online May 2014 .

Reference Entry. Subjects: Zoology and Animal Sciences. 45 words.

A class of marine sponges that have a skeleton of calcareous *spicules. Forms displaying *leucon structure are

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<i>Phylum</i> Calcarea

Claus Nielsen.

in Animal Evolution

December 2011; p ublished online December 2013 .

Chapter. Subjects: Evolutionary Biology. 1455 words.

The Calcarea is a phylum of marine ‘sponges’ consisting of approximately 400 extant species and characterised by calcareous spicules. The fossil record dates back to the Lower Cambrian...

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Massive pericarditis constrictiva calcarea with compression of the right ventricle and consecutive pulmonary embolism

Thomas Butz, Hakan Yeni, Marc Van Bracht, Martin Christ, Gunnar Plehn, Sebastion Machnick, Axel Meissner and Hans-Joachim Trappe.

in European Heart Journal - Cardiovascular Imaging

March 2009; p ublished online January 2009 .

Journal Article. Subjects: Cardiovascular Medicine. 784 words.

A 40-year-old man was admitted with a massive pericarditis constrictiva calcarea. Transthoracic and transoesophageal echocardiography demonstrated a double-layered pericardial calcification...

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Mitochondrial DNA of <i>Clathrina clathrus</i> (Calcarea, Calcinea): Six Linear Chromosomes, Fragmented rRNAs, tRNA Editing, and a Novel Genetic Code

Dennis V. Lavrov, Walker Pett, Oliver Voigt, Gert Wörheide, Lise Forget, B. Franz Lang and Ehsan Kayal.

in Molecular Biology and Evolution

April 2013; p ublished online December 2012 .

Journal Article. Subjects: Evolutionary Biology; Molecular and Cell Biology. 8362 words.

Sponges (phylum Porifera) are a large and ancient group of morphologically simple but ecologically important aquatic animals. Although their body plan and lifestyle are relatively uniform,...

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EURADICULATA

Claus Nielsen.

in Animal Evolution

December 2011; p ublished online December 2013 .

Chapter. Subjects: Evolutionary Biology. 677 words.

The Euradiculata, a clade comprised of Calcarea and Proepitheliozoa, is not supported by many morphological traits, but got its name from the characteristic, cross-striated ciliary root...

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Deep branches of the metazoan tree

Alessandro Minelli.

in Perspectives in Animal Phylogeny and Evolution

December 2008; p ublished online May 2009 .

Chapter. Subjects: Zoology and Animal Sciences. 11090 words.

The phylogenetic value of characters such as the symmetry and polarity of the main body axis and the identity and number of germ layers recognizable during embryonic development and finally...

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