Eumetazoa


Also found in: Wikipedia.

Eumetazoa

(yo͞o'mĕt'əzō`ə), subkingdom of the animal kingdom comprising all animals except the spongessponge,
common name for members of the aquatic animal phylum Porifera, and for the dried, processed skeletons of certain species used to hold water. Over 4,500 living species are known; they are found throughout the world, especially in shallow temperate waters.
..... Click the link for more information.
 and the wormlike mezozoans (see MezozoaMezozoa
, name of an animal subkingdom and also of the subkingdom's only phylum. The mezozoans are simple parasitic marine wormlike animals of only 20 to 30 cells, which are differentiated only into reproductive cells and ciliated cells.
..... Click the link for more information.
).
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

Eumetazoa

[yü‚med·ə′zō·ə]
(zoology)
A section of the animal kingdom that includes the phyla above the Porifera; contains those animals which have tissues or show some tissue formation and organ systems.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In the phylogenetic assessment presented here, and in most other phylogenies, sponges are the sister group to the Eumetazoa. The early branching position for the poriferan clade has previously identified the phylum as the ancestral progenitor for subsequent diversity in the [alpha]-CA family (Jackson, 2007).
Natura--nature Mundus Plinius--physical world naturalia--natural bodies Biota Domain Eukaryota Chatton, 1925--eukaryotes Kingdom Animalia Linnaeus, 1758 --animals Eumetazoa Butschli, 1910--eumetazoans Bilateria Hatschek, 1888-- bilaterians Eubilateria Ax, 1987 Protostomia Grobben, 1908 Lophotrochozoa K.M.
adhaerens lacks the tight junctions or septate junctions that typically accompany adherens junctions in Eumetazoa (Ganot et al., 2015), close membrane appositions manifesting a vague periodic structure often lie nearby, in the clefts between the lateral surfaces of cells in the epithelium (Ruthmann et al., 1986).
The ventral epithelium performs functions analogous to those of the digestive endothelium in Ctenophora and Eumetazoa: secretion of digestive enzymes and nutrient uptake.
Colonial origin for Eumetazoa: major morphological transitions and the origin of bilaterian complexity.
The monophyly of the Eumetazoa seems almost unquestioned.
The Metazoa consists of at least two ancient lineages of extant animals, the Eumetazoa (cnidarians, placozoans, and bilaterian phyla) and phylum Porifera (sponges) (e.g., Cavalier-Smith et al., 1996; Borchiellini et al., 2001; Medina et al., 2001; Collins, 2002; Wallberg et al., 2004).
However, as the "epithelial level of organization" exhibited by Nematostella is an extremely ancient invention that dates to the common ancestor of the Eumetazoa (if not earlier), it is likely that epithelial repair mechanisms are similarly ancient, and core elements of these pathways may be deeply conserved across animals.
Origin of the Eumetazoa: testing ecological predictions of molecular clocks against the Protero-zoic fossil record.
The situation has begun to change with the realization that core immune mechanisms are shared among Eumetazoa and with the steady accumulation of molecular evidence for basic shared characters among bilaterian immune cells.
Substantial phylogenetic evidence places the Cnidaria near the base of the Eumetazoa, possibly as the sister group to the Bilateria.