-
collagenous tubular structure called a coenecium. The body plan of
hemichordates is
characterized by a
muscular organization. The
anteroposterior axis...
-
fourth chordate subphylum, but now is
treated as a
separate phylum.
Hemichordates are now
thought to be
closer to the Echinoderms, and
together they form...
-
found in all chordates,
including tunicates (in the
larval stage). Some
hemichordates also have a
tubular nerve cord. In the
early embryonic stage, it looks...
-
repeated segments are
controlled by
similar developmental mechanisms. Some
hemichordate species can have as many as 200 gill slits.Pharyngeal
clefts resembling...
- and nematodes; and the deuterostomes,
which include the echinoderms,
hemichordates and chordates, the
latter of
which contains the vertebrates. The simple...
- or
Enteropneusta are a
hemichordate class of
invertebrates consisting of one
order of the same name. The
closest non-
hemichordate relatives of the Enteropneusta...
-
providing evidence of the use of
mollusc s**** as hard
substrates by
hemichordates dating back
nearly 480
million years ago.
Lopez et al. (2023) describe...
- to be
related to the hydrozoans; now they are
widely recognized as
hemichordates. The name "graptolite"
originates from the
genus Graptolithus ("writing...
- Echinoderms,
hemichordates, cephalochordates,
urochordates Vertebrates...
-
Cephalodiscus gilchristi is a
sessile hemichordate belonging to the
order Cephalodiscida. It is
found in
South Africa in 1908. The
parasitic copepod Zanclopus...
