Houghton David C, DeWalt R Edward, Hubbard Todd, Schmude Kurt L, Dimick Jeffrey J, Holzenthal Ralph W, Blahnik Roger J, Snitgen James L
Department of Biology, Hillsdale College, 33 East College Street, Hillsdale, MI 49242, USA.
Illinois Natural History Survey, 1816 South Oak Street, Champaign, IL 61820, USA.
Zookeys. 2022 Jul 11;1111:287-300. doi: 10.3897/zookeys.1111.72345. eCollection 2022.
Five hundred and fifty-two caddisfly species are reported from the Upper Midwest region of the United States, an area that includes 13 states and ~ 2 million km. Of these, 62 species are reported for the first time from the state of Iowa, 25 from Wisconsin, 18 from South Dakota, 12 from Illinois, five from Indiana, four from North Dakota, four from Minnesota, and one from Nebraska. The Upper Midwest fauna contains nearly 40% of all species known from the United States and Canada, as well as 22 species endemic to the region. Overall species richness was highest in Michigan (319 species), Kentucky (296), Minnesota (292), and Wisconsin (284). Differences in state species assemblages within the region largely followed a geographic pattern, with species richness declining in the western prairie states. There are almost certainly further species remaining to be found in this large region.
据报道，美国中西部上游地区有552种毛翅目昆虫，该地区包括13个州，面积约200万平方公里。其中，爱荷华州首次报告了62种，威斯康星州25种，南达科他州18种，伊利诺伊州12种，印第安纳州5种，北达科他州4种，明尼苏达州4种，内布拉斯加州1种。美国中西部上游地区的动物群包含了美国和加拿大已知所有物种的近40%，以及该地区特有的22个物种。总体物种丰富度在密歇根州（319种）、肯塔基州（296种）、明尼苏达州（292种）和威斯康星州（284种）最高。该地区各州物种组合的差异在很大程度上遵循地理模式，西部草原各州的物种丰富度在下降。在这个广大地区几乎肯定还有更多物种有待发现。
