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Free Content The Correlation of Symmetry, Color and Spination in an Urchin

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Abstract:

An abnormal specimen of Lytechinus variegatus is described in which one ocular plate has apparently become broken, the part producing interambulacra remaining in its normal position and the ambulacrum-forming part remaining in the neighborhood of the ambitus. Two extra interambulacra were inserted at an early stage of growth but later disappeared. There was a normal but compressed radial canal system under the displaced ambulacrum. In a second abnormal specimen, one ambulacrum is abnormally narrow.

Both these specimens, and one previously described, showed a correlation between shape changes, reduction of spination, and disturbance of color pattern.

Document Type: Research Article

Publication date: March 1, 1965

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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