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Any of several small, wormlike marine animals of the phylum Phoronida that have a U-shaped digestive tract and inhabit self-made chitinous tubes.

[From New Latin Phorōnida, phylum name, from Phorōnis, type genus, probably from Latin, Phoronean, Argive (name of Io, priestess of Argos), from Phorōneus, son of Inachus, king of Argos, from Greek.]

pho·ro′nid adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Animals) a small, wormlike marine animal which usually lives in the mud of the sea bottom and is hermaphrodite. Also commonly called: horseshoe worm
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.phoronid - hermaphrodite wormlike animal living in mud of the sea bottom
invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
Phoronida, Phoronidea, phylum Phoronida - small phylum of wormlike marine animals
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
York river ([dagger]) samples ANNELIDA Polychaeta Mud worm 67 Thread worm 47 Clam worm 42 Orbiniid worm 26 Blood worm 22 Ampharetid worm 7 Bamboo worm 6 Fringe worm 4 Trumpet worm 3 Paddle worm 2 ARTHROPODA Malacostraca Hooded shrimp - Gammarid amphipod 39 Corophid amphipod 1 Isopod 2 Grass shrimp 1 CHORDATA Leptocardii Lancelet/Amphioxus 1 MOLLUSCA Gastropoda Barrel bubble 28 Solitary glassy bubble 9 Turbonille 18 Bivalvia Clam 14 NEMERTEA Nemertean worm u, Phoronida Phoronid worm 22 Delaware Bay ([double dagger]) ANNELIDA Polychaeta Clam worm 116 mud worm 2 6 ARTHROPODA Amphipoda Gammarid amphipod 1 Crustacea Pea crab 2 Gastropoda Mud snail 27 Others 24 Oyster Bay ([section]) ARTHROPODA Crustacea Mud crab 10 MOLLUSCA Gastropoda Mud snail 13 PORIFERA Demospongiae Red beard sponge 2 No.
Hederella (currently assigned to either bryozoan or phoronid worm affinities) encrustations occur on ossicle swellings between Tremichnus borings along with pit-bases that probably belong to bryozoans.
In particular, phoronid transcriptomes contained a number of TLR contigs with at least 6 putative homologs recovered for Phoronis vancouverensis and 4 for Phoronis psammophila (Table 3).
The living phoronid worms are a phylum closely related to the brachiopods.
Among the most common are several species of bivalve molluscs, Nutricola (=Transennella) tantilla and Nutricola confusa, various crustaceans including grapsid crabs, Hemigrapsus oregonensis, the tanaid Leptochelia dubia, gammaridean amphipods, as well as numerous polychaete families and the phoronid, Phoronopsis viridis.
Phoronid neighbors (Johnson 1990) and the design of bryozoan colonies (Lidgard 1985) also have been shown potentially to enhance filter-feeding success.
Ciliary feeding assisted by suction from the muscular oral hood of phoronid larvae.
Genetic variability in a temperate intertidal phoronid, Phoronopsis viridis.
Species of phoronid are also noted for their wide geographical distributions and often occur in conspecific aggregations (Emig, 1982; Zimmer, 1991).
These values are similar to those of human RBCs (20 mM heme) (calculated from Guyton, 1991) and phoronid (Phoronis architecta) RBCs (14 mM heme) (Vandergon and Colacino, 1989).
Within the Lophophorata, the bryozoan with multiciliated cells took 1.7 to 3 times longer to develop to swimming than the phoronid and brachiopod with uniciliated cells.