- deuterostomes.
Hemichordates have a
nerve net and
longitudinal nerves, but no brain. Some
species biomineralize in
calcium carbonate.
Hemichordates have an open...
-
produced different "family trees". Some
closely linked chordates and
hemichordates, but that idea is now rejected.
Combining such
analyses with data from...
-
developmental biology:
hemichordates. Development, 139:2463-2475. Sato, A. & Holland, P. (2008).
Asymmetry in a
Pterobranch Hemichordate and the Evolution...
- ocean-dwelling
acorn worms. It has
zoological importance because,
being hemichordates, they are an "evolutionary link"
between invertebrates and vertebrates...
-
involved in oral jaw formation. The
presence of
pharyngeal slits in
hemichordates led to
debates of
whether this
structure was
homologous to the slits...
-
echinoderms and
hemichordates; a
member of this
group is
called an ambulacrarian.
Phylogenetic analysis suggests the
echinoderms and
hemichordates separated...
-
ventral side in a protochordate. Some
biologists have
proposed that the
Hemichordates (specifically the Enteropneusta) may
represent an
intermediate body...
-
annelids and nematodes; and the deuterostomes,
which include echinoderms,
hemichordates and chordates, the
latter of
which contains the vertebrates. The much...
-
Cephalodiscus is a
genus of
hemichordates in the
monotypic family Cephalodiscidae of the
order Cephalodiscida. All
known species live in a
secreted coenecium...
-
hemichordates also have a
tubular nerve cord. In the
early embryonic stage, it
looks like the
hollow nerve cord of chordates. Both the
hemichordates and...
