Bull Math Biol 2008 Feb 01;702:625-34. doi: 10.1007/s11538-007-9273-2.

Eutacticity in sea urchin evolution.

???displayArticle.abstract???
An eutactic star, in a n-dimensional space, is a set of N vectors which can be viewed as the projection of N orthogonal vectors in a N-dimensional space. By adequately associating a star of vectors to a particular sea urchin, we propose that a measure of the eutacticity of the star constitutes a measure of the regularity of the sea urchin. Then, we study changes of regularity (eutacticity) in a macroevolutive and taxonomic level of sea urchins belonging to the Echinoidea class. An analysis considering changes through geological time suggests a high degree of regularity in the shape of these organisms through their evolution. Rare deviations from regularity measured in Holasteroida order are discussed.

???displayArticle.pubmedLink??? 18030536
???displayArticle.link??? Bull Math Biol


Genes referenced: LOC100887844 LOC583082