ABR: Systematics of Bahamian Cerion, and on Allometry and Covariation in Rules of Form for Cerion and Other Gastropod Shells

铈离子在其壳的形式上比任何其他的 世界上最大的陆地蜗牛 成年人的大小从5到 长度70毫米，形状从球形到非常窄的圆柱体。 如果理解这种多样性是如何在一个 基因程序在不同物种之间变化不大， 获得，洞察力将获得一个重要的 关于形式变化的进化问题（黑猩猩和人类是 在基因上也没有什么不同，但在形态上 不同的）。 通过测量外壳并建立 主要研究者已经展示了 生长速度的微小变化会导致成年人的主要差异， form. 这个键可以让人理解地理和 在巴哈马群岛Cerion的形式的时间分布。 在这个项目中，首席研究员将继续他的 一系列关于巴哈马物种的专著，试图解释 通过对形态差异的相关性研究进行了探讨 以上 研究了Cerion的生长模式和适应性（或 非适应性（nonadaptive）状态的个体变化，定义物种和 人口也将继续。

Cerion shows more variety in the form of its shell than any other land snail in the world. Sizes of adults range from 5 to 70 mm in length, shapes from spheres to very narrow cylinders. If an understanding of how such variety is generated within a genetic program that varies little from species to species could be obtained, insight would be gained into an important evolutionary question about change in form (chimps and humans are also very little different genetically, but morphologically quite disparate). By measuring shells and establishing correlations of characters in growth, the principal investigator has shown how small changes in rates of growth yield major differences in adult form. This key allows one to make sense of the geographic and temporal distribution of form in Cerion on the Bahama Islands. In this project, the principal investigator will continue his series of monographs on Bahaman species, trying to explain differences in form through the study of correlations discussed above. Studies of growth patterns in Cerion and the adaptive (or nonadaptive) status of individual changes that define species and populations will also be continued.