ambulacral

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am·bu·lac·rum

(ăm′byə-lăk′rəm, -lā′krəm)

n. pl. am·bu·lac·ra (-lăk′rə, -lā′krə)

One of the five radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.

[Latin ambulācrum, walk planted with trees, from ambulāre, to walk; see ambhi in Indo-European roots.]

am′bu·lac′ral 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.

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Adj.

ambulacral - pertaining to the ambulacra of radial echinoderms

zoological science, zoology - the branch of biology that studies animals

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References in periodicals archive ?

Nutritional particles are caught by ambulacral tentacles located along the entire length of the ambulacrum.

Elgaecrinus uralicus gen. et sp. nov., a new crotalocrinitid (Crinoidea, Echinodermata) from the Lower Devonian (Lochkovian) of the Middle Urals

Characters examined include general body appearance, encrusting ossicles, pedicellariae, madreporite, abactinals, terminals, marginals, intermarginals, actinals, oral frame, ambulacral grooves and interambulacrals, papulae, tube feet, digestive tract, and its development.

Biology of Incidental Catch Sea Star Stellaster childreni Gray, 1840 (Echinodermata: Asteroidea), from Malaysian Borneo Exclusive Economic Zone

The emergence of plates related to the ambulacral system follows the Ocular Plate Rule.

Development of the sea star Echinaster (Othilia) brasiliensis, with inference on the evolution of development and skeletal plates in Asteroidea

Legs (Figs 13-16): All legs with ambulacral claws and bearing smooth setae on all segments except tarsi.

Description of Trigonuropoda (Foveolatatrigon) mahunkaorum sp. n. (Acari: Uropodina: Trigonuropodidae): the first record of the genus Trigonuropoda in Madagascar

The dorsal surface of this species is characterized by a series of irregularly positioned papillae of different sizes and shapes (Dendy 1896, Sewell 1987), although the ventral surface is smoother, with the presence of ambulacral podia, or tube feet, which are used for locomotion (Dendy 1896, Sewell 1987).

A review of the research on the Australasian sea cucumber, Australostichopus mollis (echinodermata: holothuroidea) (Hutton 1872), with emphasis on aquaculture

Surco ambulacral estrecho, las placas interambulacrales tienen una hilera de espinas internas pequenas, digitiformes, varias en cada placa, y una serie externa de espinas mas grandes, dos en cada placa.

Tres nuevos registros de asteroideos (Echinodermata: Asteroidea) de Peru

Legs: bear short, smooth and needle-like setae, leg I without ambulacral prolognation.

Un nuevo e inusual acaro Uropodina (Uroobovella vazquezae sp. nov.) de Mexico (Acari: Mesostigmata)

The monophyly of the genus Echinocardium is based on two synapomorphies: an anal branch is added to the subanal fasciole, and the labrum is short and bordered by two pairs of ambulacral plates.

Morphometrics and cladistics: measuring phylogeny in the sea urchin Echinocardium

Ambulacral grooves descend from the arms, run along the surface of the visceral mass, and unite at the centrally located mouth (Fig.

Autotomy of the visceral mass in the feather star himeroinetra robustipinna (crinoidea, comatulida)

Legs (Figs 22-25): All legs with ambulacral claws, all setae on legs smooth.

Two new Uropodina species from Ethiopia (Acari: Mesostigmata)

columbiana was related to an unusual defense in which the snail inserted its proboscis deep into one of the sea star's ambulacral grooves and bit the radial nerve.