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Deuterostomes (from Gr****: lit. 'mouth second') are
bilaterian animals of the
superphylum Deuterostomia (/ˌdjuːtərəˈstoʊmi.ə/),
typically characterized...
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consists of triploblastic, eucoelomate, and
bilaterally symmetrical marine deuterostome animals,
generally considered the
sister group of the echinoderms. They...
- lineages, but are not part of the
formal definition: All
chordates are
deuterostomes. This
means that,
during embryonic development, the ****
forms before...
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become its
digestive tube (the archenteron). In the sister-clade, the
deuterostomes (lit. 'second-mouth'), the
original dent
becomes the ****
while the...
- ago in the
beginning of the
Cambrian period.
Initially proposed as a
deuterostome,
which would have made it the
oldest known species of this superphylum...
- as arthropods, molluscs, flatworms,
annelids and nematodes; and the
deuterostomes,
which include echinoderms,
hemichordates and chordates, the latter...
-
happened at
least twice,
following different paths in
protostomes and
deuterostomes. This
accompanied or
facilitated other important evolutionary developments:...
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Pharyngeal slits are filter-feeding
organs found among deuterostomes.
Pharyngeal slits are
repeated openings that
appear along the
pharynx caudal to the...
- Yanjia****a
biscarpa is an
extinct species of
Early Cambrian deuterostome which may
represent the
earliest stem
group echinoderm. This
species is known...
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bilaterian animals into two
natural groupings: the
protostomes and
deuterostomes. In
animals at
least as
complex as an earthworm, a dent
forms in one...
