Phylogeny of the Crustacea Based on 18S Ribosomal Nucleotide Sequences

甲壳类动物是一个庞大的，形态多样的群体， 淡水和海洋动物的进化关系 争议 佛罗里达州立大学的拉里·阿贝尔博士和 他的同事们正在利用现代DNA分子分析来获得 来自许多组的代表性样品的核苷酸序列数据 藤壶、螃蟹、桡足类、虾等。 它们因此可以 获得可比较的同源特征， 在这些不同的甲壳类动物中， 血统 反过来，这些知识将允许测试的想法 关于这些动物的形态多样性， 分布和生态专业化。

The Crustacea are a large and morphologically diverse group of freshwater and marine animals whose evolutionary relationships are controversial. Dr. Larry Abele at Florida State University and colleagues are employing modern molecular analyses of DNA to obtain nucleotide sequence data from representative samples of many groups of barnacles, crabs, copepods, shrimps, and others. They can thus acquire comparable, homologous characters for the reconstruction of phylogenetic branching patterns among these various crustacean lineages. In turn such knowledge will permit testing of ideas about morphological diversification in these animals, geographic distribution, and ecological specialization.