How To Use Ambulacral In A Sentence
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In these, as in the Crinoids, the interambulacral plates are absent, and the interambulacral spaces are filled by an encroachment of the ab-oral region upon them.
The Atlantic Monthly, Volume 10, No. 57, July, 1862
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In technical language, the surface from which these fleshy threads protrude, are called ambulacral areas, and the spaces between, interambulacral areas.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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Its wide ambulacral grooves and open filtration fan made it adapted for motile particle capture in a wide variety of environments.
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[ECHINUS RUFFINII] "Body sub-depressed; ambulacral and interlambulacral; plates with several primary tubercles on each closely ranged, having circles of secondary tubercles surrounding their bases; rows of pores very oblique, with three pair of pores in each row, the uppermost distant from the other two.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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[GONIOCLYPEUS SUBANGULATUS] somewhat pentangular; posterior or anal orifice lateral, or upon the superior face; interambulacral area grooved, with the continued area beneath projecting; interambulacral areas sub-angulated; mouth rather narrow or small, central; peristome angular, and surrounded by five angular prominences, which terminate in the interambulacral areas, between which is a rosette, perforated by seven pairs of pores, with three odd ones at the end of each petal; ambulacra petaloid and closed; the prolonged zone provided with alternating pores as far as the base; pores connected by oblique grooves; interambulacral wide; plates large, and nine or ten in a column.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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Modified ossicles called lappets that border the ambulacral groove function to close off the groove and prevent damage to the tube feet.
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In summary, the available evidence from both ontogeny and adult morphology suggests that the first ambulacral is at least involved in the construction of the MAO.
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Body broadly ovate, elevated and truncate posteriorly; back oblique; dorsal impression lanceolate; scutab area very slightly excavated; ambulacral spaces broad, triangular, depressed; interambulacral spaces slightly convex; anteal furrow broad and shallow, sides slightly gibbous; sub-anal impressions broadly ob-cordate; post-oral spinous space broadly lanceolate.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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Paul follows Kesling in the ambulacral placement.
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In asteroids, the ambulacrals arch to form a deep ambulacral groove.
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Interadambulacral contact facets lie beneath the ambulacral and overlie tissue depressions for the longitudinal muscles that lower the arm.
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Body broadly ovate, elevated and truncate posteriorly; back oblique; dorsal impression lanceolate; scutab area very slightly excavated; ambulacral spaces broad, triangular, depressed; interambulacral spaces slightly convex; anteal furrow broad and shallow, sides slightly gibbous; sub-anal impressions broadly ob-cordate; post-oral spinous space broadly lanceolate.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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[GONIOCLYPEUS SUBANGULATUS] somewhat pentangular; posterior or anal orifice lateral, or upon the superior face; interambulacral area grooved, with the continued area beneath projecting; interambulacral areas sub-angulated; mouth rather narrow or small, central; peristome angular, and surrounded by five angular prominences, which terminate in the interambulacral areas, between which is a rosette, perforated by seven pairs of pores, with three odd ones at the end of each petal; ambulacra petaloid and closed; the prolonged zone provided with alternating pores as far as the base; pores connected by oblique grooves; interambulacral wide; plates large, and nine or ten in a column.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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-- The ambulacral areas are narrow, but the poriferous zones are rather wide; and the interambulacral areas are about four times as wide as the ambulacral.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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The spiracles in orbitremitids pierce the adoral extremity of deltoid faces and are bounded laterally by ambulacral plates, which is the condition seen in the Chinese specimens.
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The unusual thecal plating, rhomb structure, and ambulacral organization - standard criteria for distinguishing rhombiferans - justify the recognition of a new genus.
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Somasteroids typically are foliate with ventral series of so-called virgals extending from ambulacrals to marginals.
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Echinoderms the interambulacral plates are absent; there are no rows of plates of a different kind alternating with the ambulacral ones, as in the Sea-Urchins and the Star-Fishes, but the ab-oral region closes immediately upon the ambulacra.
The Atlantic Monthly, Volume 10, No. 57, July, 1862
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In technical language, the surface from which these fleshy threads protrude, are called ambulacral areas, and the spaces between, interambulacral areas.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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Further, adambulacralambulacral articulation is distinct between Zoroaster and the superficially similar Paleozoic species, and ambulacral form also is distinctive.
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[CIDARIS CAROLINENSIS] small tubercles with two in a row, and interspersed with minute ones, which appear in some places to be arrayed in subordinate rows; interambulacral areas wide, covered with small subequal and rather prominent tubercles, among which minute granules are scattered; area about four times as wide as the former; plates pentagonal, supporting two rows of large perforated primary tubercles, surrounded by plain circular zones; miliary zone concave or depressed.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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These are broad concavities in the ambitus that could be considered precursors to the ambulacral notches of certain mellitids.
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As in non - stelleroid echinoderms, asteroid ambulacrals form a biserial column.
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The ambulacral grooves are narrow and the ambulacral ossicles are not exposed.
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The longest ambulacral column is parallel and adjacent to the ambulacral-adambulacral furrow.
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(combs), from which they take their name of Ctenophorae, with the ambulacral (locomotive) apparatus of the echinoderms.
Louis Agassiz His Life and Correspondence
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-- The ambulacral areas are narrow, but the poriferous zones are rather wide; and the interambulacral areas are about four times as wide as the ambulacral.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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Notches (‘open’ lunules) are ambulacral lunules that form close enough to the ambitus that the ambitus is unable to close over the distal part of the notch to form a closed lunule.
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Echinoderms the interambulacral plates are absent; there are no rows of plates of a different kind alternating with the ambulacral ones, as in the Sea-Urchins and the Star-Fishes, but the ab-oral region closes immediately upon the ambulacra.
The Atlantic Monthly, Volume 10, No. 57, July, 1862
