deuterostome

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deu·ter·o·stome

(do͞o′tə-rō-stōm′)

Any of a numerous animals of the group Deuterostomia, in which the anus develops from the first opening in the embryo and the mouth develops later, and including the echinoderms, hemichordates, and chordates.

[From New Latin Deuterostomia, taxon name : deutero- + New Latin stoma; see stoma.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

deuterostome

(ˈdjuːtərəˌstəʊm)

any member of the major group of animals defined by the fact that during early embryonic development the first opening to form becomes the anus of the animal. The opposite is protostome

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

deu•ter•o•stome

(ˈdu tər əˌstoʊm, ˈdyu-)

n.

1. a mouth that develops separately from the blastopore.

2. an animal with this form of development, as an echinoderm or chordate.

[1945–50]

References in periodicals archive ?

Deuterostome neuroanatomy and the body plan paradox.

Abbreviated Development of the Brooding Brittle Star Ophioplocus esmarki

"We think that as an early deuterostome this may represent the primitive beginnings of a very diverse range of species, including ourselves," study co-author Simon Conway Morris from the University of Cambridge, said in a (http://www.cam.ac.uk/research/news/bag-like-sea-creature-was-humans-oldest-known-ancestor) statement .

Meet Saccorhytus Coronarius, Humans' Earliest Known Ancestor

They are wide-spread, occur both in pro- and eukaryotes, in particular in bacteria and are found in some viruses, protozoa, a few insect species and regularly in deuterostome animals, from echinoderms onward.

Sialic acids as link to Japanese scientists

Another very primitive stem group of deuterostomes, called ventulicolians, has also recently been described that might represent the anatomy of organisms near the base of the deuterostome evolutionary branch that were ancestral to both the chordates and echinoderms.

The fossil record of the Cambrian "explosion": resolving the tree of life

Of course, eyes are characteristic of the vertebrates in the deuterostome group.

Evolution: do the eyes have it?

We recently reported that larval sea stars are capable of complete regeneration of missing body parts, providing a new deuterostome model for the study of regeneration.

CHARACTERIZATION OF NOVEL GENES EXPRESSED DURING LARVAL SEA STAR REGENERATION

Despite being trained in comparative anatomy, or perhaps because of it, I was distrustful of some of the morphological criteria - for example, diploblastic versus triploblastic, or proterostome versus deuterostome - used in reconstructing phylogeny.

The Shape of Life: Genes, Development, and the Evolution of Animal Form

Analyses of their mitochondrial genome suggest a deuterostome affinity of the clade (Philippe et al., 2011; Robertson et al., 2017), but large-scale phylogenomic studies suggest that it is a sister group to all other extant bilaterians (Nephrozoa) (Hejnol et al., 2009; Cannon et al., 2016).

A New Species of Orthonectida That Parasitizes Xenoturbella bocki: Implications for Studies on Xenoturbella

Within the deuterostome clade, however, few animals are capable of complete nervous system regeneration after total neural ablation.

Getting a Head with Ptychodera flava Larval Regeneration

Deuterostome phylogeny and the sister group of the chordates: evidence from molecules and morphology.

Determining distribution and size of larval pacific geoduck clams (Panopea generosa Gould 1850) in quartermaster harbor (Washington, USA) using a novel sampling approach

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