acorn worm


Also found in: Medical, Encyclopedia, Wikipedia.

acorn worm

n.
Any of a class (Enteropneusta) of hemichordate, wormlike animals that inhabit intertidal areas and soft marine sediments and have an acorn-shaped proboscis.

acorn worm

n
(Animals) any of various small burrowing marine animals of the genus Balanoglossus and related genera, having an elongated wormlike body with an acorn-shaped eversible proboscis at the head end: subphylum Hemichordata (hemichordates)

a′corn worm`


n.
any wormlike marine animal of the phylum Hemichordata, having gill slits and an acorn-shaped proboscis and collar.
References in periodicals archive ?
The fossils, Spartobranchus tenuis, are a member of the acorn worm group.
A reddish-purple acorn worm with large lips either side of its head region reminded researchers of floppy-eared Star Wars character Yoda while pupurata is Latin for purple and describes its colorful hue.
Given the chance to explore these regions, researchers uncovered much that was new, including this species of acorn worm.
A few examples of the diverse topics covered in the volumes include acorn worm, air masses and fronts, animal cancer tests, big bang theory, biophysics, buckwheat, cardiac cycle, dentrification, dragonflies, geotropism, ice age refuges, irrational number, legumes, nuclear winter, oscillations, photocopying, quantum electrodynamics, restoration ecology, set theory, squirrel fish, tartaric acid, tumbleweed, ultraviolet astronomy, weather forecasting, xylotomy, and zodiacal light.
She notes that a United States bioprospecting group collected 204 pounds of a marine acorn worm just to isolate one milligram of an anticancer compound.
Previously we had sequenced this acorn worm multiple times, but to further verify this sequence, genomic DNA was extracted from S.
But Shu and others contested that interpretation, arguing in the April 4 NATURE that Yunnanozoon was a hemichordate, a separate phylum that includes the modern acorn worm.
Here, we use ribosomal DNA sequence and morphology to characterize an acorn worm from the Russian Kara Sea as new genus and species: Coleodesmium karaensis within the family Torquaratoridae.
There are acorn worms and before you start dismissing worms as inferior and primitive then consider that the acorn worms are classified with us humans in the Phylum Chordata -- chordates like us.
Vargas (1987, 1988) also listed the presence of peanut worms (Sipuncula), Glottidia audebarti (Broderip, 1835) lamp shells (Brachiopoda) and acorn worms (Enteropneusta).
The DNA of two acorn worms from Hawaii were compared with those of 32 species, including humans.