ambulacrum

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  • noun

Words related to ambulacrum

one of the five areas on the undersurface of an echinoderm on which the tube feet are located

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References in periodicals archive ?
Synapomorphy: external rows of the anterior and posterior paired ambulacra (Ib-IIa and IVb-Va) form a continuous, concave or bow-like curve with each other [ILLUSTRATION FOR FIGURES 1-2 OMITTED].
Number of plates of the posterior ambulacra (rows Ia and Vb) entering the subanal fasciole.
Five of these pairs form the ambulacra, and they alternate with the five remaining pairs, which form the interambulacra.
The lower stiffness of ambulacra compared to interambulacra of E.
The space between the rings indicated that the growth rates of plates in ambulacra were faster than in interambulacra.
One podium (external expansion) and its ampulla (internal expansion) protude from the aquiferous canal alternately on each side along the radial ambulacra [ILLUSTRATION FOR FIGURE 12C AND D OMITTED].
Nine-day-old metamorphosing larvae look like yolky stars and have the first pairs of tube feet present in four ambulacra [ILLUSTRATION FOR FIGURES 1I, 2I OMITTED].