Phylogenetic context and Basal metazoan model systems.

  title={Phylogenetic context and Basal metazoan model systems.},
  author={Allen G Collins and Paulyn Cartwright and Catherine S McFadden and B. Schierwater},
  journal={Integrative and comparative biology},
  volume={45 4},
In comparative studies using model organisms, extant taxa are often referred to as basal. The term suggests that such taxa are descendants of lineages that diverged early in the history of some larger taxon. By this usage, the basal metazoans comprise just four phyla (Placozoa, Porifera, Cnidaria, and Ctenophora) and the large clade Bilateria. We advise against this practice because basal refers to a region at the base or root of a phylogenetic tree. Thus, referring to an extant taxon or… CONTINUE READING

From This Paper

Figures, tables, and topics from this paper.

Explore Further: Topics Discussed in This Paper


Publications citing this paper.
Showing 1-10 of 22 extracted citations

Cnidarian-microbe interactions and the origin of innate immunity in metazoans.

Annual review of microbiology • 2013
View 9 Excerpts
Highly Influenced

Deep metazoan phylogeny: when different genes tell different stories.

Molecular phylogenetics and evolution • 2013
View 1 Excerpt

A New Look at Some Old Animals

PLoS biology • 2009
View 2 Excerpts


Publications referenced by this paper.
Showing 1-10 of 117 references

The invertebrates: Protozoa through Ctenophora

L. H. Hyman
McGraw-Hill Book Company, Inc. New York. • 1940
View 4 Excerpts
Highly Influenced

Systematics of the Hexacorallia (Cnidaria: Anthozoa)

M. Daly, D. G. Fautin, V. A. Cappola.
Zool. J. Linn. Soc. 139: 419–437. • 2003
View 7 Excerpts
Highly Influenced

Similar Papers

Loading similar papers…