Molecular phylogenetics and microsatellite analysis reveals cryptic species of speckled dace (Cyprinidae: Rhinichthys osculus) in Oregon’s Great Basin

Speckled dace (Rhinichthys osculus) is a small cyprinid that occurs throughout western North America and is the most commonly occurring fish in Oregon. Because of the high genetic and morphological variation in this species across its range, it has been referred to as a species complex; however, no revision to its taxonomy has occurred since 1984. Here, the phylogenetics and population genetics of speckled dace are examined throughout Oregon’s Great Basin to describe genetic variation and infer the geographic boundaries between distinct taxonomic entities and populations. We tested the validity of a putative subspecies, Foskett Spring speckled dace, that occurs in a single spring within Warner Valley in Southeast Oregon and is listed Federally as threatened. Dace were collected from Foskett Spring and all surrounding basins containing speckled dace (Warner, Goose Lake, Lake Abert, Silver Lake, and Malheur), as well as Stinking Lake Spring (located within Malheur), created phylogenetic t...斑鳍鱥（Speckled dace，*Rhinichthys osculus*）是一类小型鲤科鱼类，广泛分布于北美西部，同时也是俄勒冈州最常见的鱼类。由于该物种在其分布范围内存在极高的遗传与形态变异，因此被视为一个物种复合群；然而自1984年以来，其分类学研究尚未进行任何修订。本研究对俄勒冈州大盆地范围内的斑鳍鱥开展系统发育与群体遗传学分析，以阐明其遗传变异特征，并推断不同分类单元与种群间的地理分界。我们验证了推定亚种福斯科特泉斑鳍鱥的分类有效性：该亚种仅分布于俄勒冈州东南部沃纳谷的一处泉眼内，已被联邦政府列为受威胁物种。本研究采集了福斯科特泉以及所有周边分布有斑鳍鱥的流域（沃纳、鹅湖、艾伯特湖、银湖与马卢尔流域），以及位于马卢尔流域内的臭湖泉的斑鳍鱥样本，构建了系统发育...