acorn worm

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acorn worm

a hemichordate, one of the three groups of invertebrate chordates collectively referred to as PROTOCHORDATES.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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Molecular phylogeny of hemichordata, with updated status of deep-sea enteropneusts. Mol.
A new copepod with transformed body plan and unique phylogenetic position parasitic in the acorn worm Ptychodera flava
Notably, support for enteropneust monophyly is moderate (65/0.99), and SH testing did not reject the alternative hypothesis (enteropneust paraphyly).
Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms
EXTERNALLY BROODING ENTEROPNEUST Table 1 Specimen and sequence identification 18S 16S Voucher Citation Torquaratoridae Yoda purpurata JN886757 JNSS6740 NHMUK 2011.5 Osborn et (117l-36a) al., 2012 Yoda purpurata JN886758 JN886741 NHMUK 2011.6 Osborn et (117l-36b) al., 2012 Yoda purpurata JN886759 JN886742 NHMUK 2011.9 Osborn et (1174-43a) al., 2012 Genus B sp.
An externally brooding acorn worm hemichordata, enteropneusta, torquaratoridae from the Russian Arctic
A comparative molecular approach to mesodermal patterning in basal deuterostomes: the expression pattern of Brachyury in the enteropneust Ptychodera flava.
cDNA sequences for transcription factors and signaling proteins of the hemichordate saccoglossus kowalevskii: efficacy of the expressed sequence tag (EST) approach for evolutionary and developmental studies of a new organism
It is robust and can be collected intact, unlike many other species of enteropneust, which are fragile and easily broken.
The anatomy, life habits, and later development of a new species of enteropneust, Harrimania planktophilus (hemichordata: Harrimaniidae) from barkley sound
Given the unquestionable shared form of the hemichordate pharynx with that of fossil echinoderms and protochordates, I decided to investigate the potential for filter feeding in the enteropneust worm Harrimania planktophilus.
Particle retention and flow in the pharynx of the enteropneust worm Harrimania planktophilus: the filter-feeding pharynx may have evolved before the chordates
How is the pterobranch feeding apparatus and ciliation similar to an enteropneust's proboscis and collar?
Convergence in the feeding apparatuses of lophophorates and pterobranch hemichordates revealed by 18S rDNA: an interpretation
Brachiopods, sipunculans, enteropneusts and metals from two estuarine tidal flats, Pacific, Costa Rica.
Water parameters and primary productivity at four marine embayments of Costa Rica (2000-2002)/Parametros del agua y productividad primaria en cuatro bahias marinas de Costa Rica (2000-2002)
"Our description of Spartobranchus tenuis, a creature previously unknown to science, pushes the fossil record of the enteropneusts back 200 million years to the Cambrian period, fundamentally changing our understanding of biodiversity from this period," he added.
Strange phallus-shaped creature provides missing link between 2 marine animals
The discovery of a 500-million-year-old penis-shaped fossil has provided a missing link that pushes back evolution of enteropneusts by 200 million years.
500 Million-Year-Old Penis-Shaped Missing Link Found in Canada
Yoda purpurata -- to be exact -- is the name now given by a University of Aberdeen-led team of scientists to one of three new species of deep sea acorn worms or Enteropneusts discovered 2,500m or around 1.5 miles below the surface of the Atlantic Ocean.
Deep Sea Acorn Worms Named After Yoda
La Paz, Baja California Sur; commensal of enteropneusts. *Lepidasthenia ornata Treadwell, 1937: 145-147, pl.
Polychaetes (Annelids: Polychaeta) described for the Mexican Pacific: an historical review and an updated checklist/los poliquetos (Annelida: Polychaeta) descritos en el Pacifico mexicano: revision historica y lista faunistica actualizada

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