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Acorn Worms

Definition of the noun Acorn Worms

What does Acorn Worms mean as a name of something?

Acorn worms is the vernacular name of the Enteropneusta, a class of Hemichordata.

Printed dictionaries and other books with definitions for Acorn Worms

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Google previewThe Facts on File Dictionary of Marine Science (2008)

by Barbara Charton, John Tietjen

Acorn worms are the most common living organisms in this group. The name Hemichordata was first proposed because the protruding mouthpart was assumed to be a notochord. They are characterized by a three-part body plan: a preoral ...

Google previewThe Encyclopedia of Animals (2004)

A Complete Visual Guide by Fred Cooke

Phylum Hemichcdata Hemicnordates (acorn worms) Phyhim Chaetognatha A/ row worms Phylum Oastrotncha Gastrotnchs Phylum Kmorttyncha Spiny<rown worms ...

Google previewChoice Dictionary of Biology (2010)

by Sanjay Yadav

Hemichordata: A phylum of soft-bodied marine invertebrates that comprises two classes: the Enteropneusta (acorn worms), which are cylindrical burrowing animals; and the Pterobranchia, which are colonial forms with vaseshaped bodies.

Google previewA Dictionary of Geology and Earth Sciences (2013)

by Michael Allaby

Hemichordata (acorn worms) Phylum first encountered in the Middle 'Cambrian ' Burgess Shale, British Columbia, Canada. The acorn worms are related to the ' chordates, for although they lack a 'notochord, the gill slits are very similar to those ...

Google previewA Dictionary of Zoology (2014)

by Michael Allaby

acorn worms See ENTEROPNEUSTA. acousticolateralis system The innerear region and * lateralline organs located in the skin, forming a sensory system that conveys environmental information to ...

Google previewA Dictionary of Genetics (2006)

by Robert C. King, William D. Stansfield, Pamela Khipple Mulligan

branch Hemichordata ( acorn worms and pterobranchs) branch Urochordata (tunicates) branch Ct- phalochordata (lancelets, Branchiostoma) subphylum Craniata (q.v.) branch Agnatha ...

Google previewThe Recreational Diver's Dictionary & Historical Timeline (2003)

by Scott Dowding

angiotensin converting enzyme, acorn worms—n. 1. any of the worrnlike marine animals that belong to the phylum Hemichordata, possessing gill slits and an acorn-shaped proboscis and collar, active continental margin—n. 1. a continental ...

Google previewDictionary of Marine Natural Products with CD-ROM (2007)

by John W. Blunt, Murray H. G. Munro

consisting of two surviving types of organism; the acorn worms (Enteropneusts) inhabiting temperate and tropical waters, and the ...

Google previewEncyclopedia of Biology (2009)

by Don Rittner, Timothy Lee McCabe

hemichordates Consisting of only a few hundred species, the hemichordates include the acorn worms 160 hemochromatosis (e.g., Saccoglossus), which burrow in sand and mud,

Google previewScience and Technology Encyclopedia (2000)

by The University of Chicago Press, Leszek Kołakowski

and Hemichordata (acorn worms). chorion Outermost of the protective membranes of the embryonic system of birds, reptiles or ...

Google previewEncyclopedia of Marine Sciences (2012)

by Hanneke(J.)G. Baretta-Bekker, Egbert K. Duursma, Bouwe R. Kuipers

Wormlike marine animals subdivided into Enteropneusta (acorn worms) and Pterobranchia. Enteropneusta have ...

Google previewEncyclopedia of Immunobiology (2016)

Jawed vertebrates Vertebrata Agnathostomata Jawless vertebrates Tunicata Cephalochordata Amphioxus Ciona Hemichordata Acorn worms Echinodermata Arthropoda Insects Crustaceans Nematoda Roundworms Annelida Earthworms ...

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