Molecular Systematics of North American Cyprinid Fishes: Cyprinella lutrensis and the C. lutrensis Complex

这项拟议的研究将调查北美鲤科鱼类Cyprinella lutrensis的地理样本中线粒体(Mt)DNA分子的差异，以及属于美国大陆鲤科鱼类复合体或物种组的其他物种。这项研究主要是为了推断吕特锦鸡儿内部和复杂物种之间的系统发育或系谱关系的假设。通过实现主要目标而实现的目标包括：(1)评估德州佩科斯河畔和其他地区是否存在隐蔽物种；(2)评估导致目前美国大陆卢特毛虫和相关物种分布的生物地理事件。目标(I)对于美国特有或原生动物的清单以及得克萨斯州和美国西南部正在进行的保护和保存土著生物的努力具有重要意义。目标(2)最终将对美国大陆中部和西南部在冰期前和冰期后发生的地质事件提出假设。

The proposed research will investigate variation in mitochondrial (mt) DNA molecules among geographic samples of the North American cyprinid fish Cyprinella lutrensis an among other species belonging to the C. lutrensis complex or species-group in the continental United States. The research is designed primarily to infer hypotheses of phylogenetic or genealogical relationships within C. lutrensis and among C. lutrensis complex species. Goals to be realized by achievement of the primary objective include (i) an assessment of whether cryptic species within the C. lutrensis complex exist in the Trans-Pecos and other regions in Texas, and (ii) an assessment of the biogeographic events which led to the current distribution of C. lutrensis and related species in the continental United States. Goal (i) is of importance relative to the inventory of fauna endemic or native to the a United States and to ongoing attempts within Texas and the southwestern United States to protect and preserve native organisms. Goal (ii) will ultimately provide hypotheses of geological events which occurred in the central and southwestern regions of the continental United States during pre- and post-glacial times.