a coenecium. The discovery of the stem group hemichordate Gyaltsenglossus shows that early hemichordates combined aspects of the two morphologically disparate...

pterobranch hemichordate. Opinions differ about whether the Chengjiang fauna fossil Yunnanozoon, from the earlier Cambrian, was a hemichordate or chordate...

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...

repeated segments are controlled by similar developmental mechanisms. Some hemichordate species can have as many as 200 gill slits. Pharyngeal clefts resembling...

of pterobranch hemichordates: history and perspectives". Genesis. 46 (11): 587–91. doi:10.1002/dvg.20395. PMID 18798243. Hemichordate Nervous System Loduca...

or Enteropneusta are a hemichordate class of invertebrates consisting of one order of the same name. The closest non-hemichordate relatives of the Enteropneusta...

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...

Planctosphaera pelagica is a hemichordate and the only known representative of the class Planctosphaeroidea. The species is known only by its free swimming...

and nematodes; and the deuterostomes, which include the echinoderms, hemichordates and chordates, the latter of which contains the vertebrates. The simple...

animal phyla (including arthropods, molluscs, annelids, echinoderms, hemichordates and chordates) appear. Reef-building archaeocyathan sponges initially...

taxa reported from this assemblage (purported sponges, algae, a worm, a hemichordate tube and a lobopod) are actually trace fossils (mostly burrows containing...

providing evidence of the use of mollusc shells as hard substrates by hemichordates dating back nearly 480 million years ago. Lopez et al. (2023) describe...

superphyla. The deuterostomes traditionally include the echinoderms, hemichordates, chordates, and the extinct Vetulicolia. The protostomes include most...

studies suggesting placements as a cephalochordate, a stem-chordate, a hemichordate, a stem-vertebrate, a stem-deuterostome, an ambulacrarian, a bilaterian...

with the common name of acorn worm. This organism is classified as a Hemichordate, and they are marine worms that use their hydrostatic skeleton to tunnel...

Rhabdopleura recondita is a sessile hemichordate. It is a suspension feeder that secretes tubes on the ocean floor. It is found in the Adriatic and Ionian...

Rahman, I. A. (2022). "Heterochrony and parallel evolution of echinoderm, hemichordate and cephalochordate internal bars". Proceedings of the Royal Society...

deuterostomes. Deuterostomes include vertebrates as well as echinoderms, hemichordates (mainly acorn worms), and Xenoturbellidans. Protostomes, the more diverse...

expression can be detected in the developing pharynx of amphioxi and hemichordates. However, the vertebrate pharynx is unique in that it gives rise to...

Cephalodiscus nigrescens is a sessile hemichordate belonging to the order Cephalodiscida. The parasitic protozoan Neurosporidium cephalodisci has been...

in the subphyla Vertebrata and Cephalochordata, as well as in some hemichordates. It is one of the five embryonic features unique to all chordates, the...

no body cavity approx. 100 Hemichordata Half cord: 344  Acorn worms, hemichordates Stomochord in collar, pharyngeal slits approx. 130 extant Kinorhyncha...

'Lophenteropneust' hypothesis refuted by collection and photos of new deep-sea hemichordates. Nature 434: 374-376}) is a family of acorn worms (Hemichordata) that...

  Echinoderms, hemichordates, cephalochordates, urochordates   Vertebrates...

"Development and neural organization of the tornaria larva of the Hawaiian hemichordate, Ptychodera flava". Zoological Science. 21 (1): 69–78. doi:10...

phylum appeared near the start of the Cambrian. Gill (pharyngeal) slits Hemichordates form a sister phylum to the echinoderms. They are solitary worm-shaped...

glossa, meaning "tongue", a common generic suffix for hemichordates) is a monospecific hemichordate known from the Burgess Shale of Canada that is notable...

Cameron, Christopher B. (2016). "Cambrian suspension-feeding tubicolous hemichordates". BMC Biology. 14: 56. doi:10.1186/s12915-016-0271-4. PMC 4936055. PMID 27383414...

with most invertebrate phyla, or deuterostomes, along with chordates, hemichordates and echinoderms. The traditional view was that lophophorates were a...