Department of Invertebrate Zoology, Santa Barbara Museum of Natural History, Santa Barbara, California, United States.
Biodiversity Knowledge Integration Center, Arizona State University, Tempe, Arizona, United States.
PeerJ. 2023 Mar 8;11:e14793. doi: 10.7717/peerj.14793. eCollection 2023.
The beetle fauna of the California Channel Islands is here enumerated for the first time in over 120 years. We provide an annotated checklist documenting species-by-island diversity from an exhaustive literature review and analysis of a compiled dataset of 26,609 digitized specimen records to which were added over 3,000 individual specimen determinations. We report 825 unique species from 514 genera and 71 families (including 17 new family records) comprising 1,829 species-by-island records. Species totals for each island are as follows: Anacapa (74); San Clemente (197); San Miguel (138); San Nicolas (146); Santa Barbara (64); Santa Catalina (370); Santa Cruz (503); and Santa Rosa (337). This represents the largest list of species published to date for any taxonomic group of animals on the Channel Islands; despite this, we consider the checklist to be preliminary. We present evidence that both inventory and taxonomic efforts on Channel Islands beetles are far from complete. Rarefaction estimates indicate there are at least several hundred more species of beetles yet to be recorded from the islands. Despite the incomplete nature of existing records, we found that species diversity is highly correlated with island area. We report 56 species which are putatively geographically restricted (endemic) to the Channel Islands, with two additional species of questionable endemic status. We also report 52 species from the islands which do not natively occur in the southern California region.
加利福尼亚海峡群岛的甲虫区系在 120 多年来首次被列出来。我们提供了一份标注的清单，记录了从 exhaustive literature review 和对 26609 个数字化标本记录的编译数据集的分析得出的每个岛屿的物种多样性，其中增加了 3000 多个单独的标本鉴定。我们报告了来自 514 属和 71 科（包括 17 个新的科记录）的 825 个独特物种，其中包括 1829 个岛屿物种记录。每个岛屿的物种总数如下：阿纳卡帕（74）；圣克莱门特（197）；圣米格尔（138）；圣尼古拉斯（146）；圣巴巴拉（64）；圣卡塔利娜（370）；圣克鲁斯（503）；圣罗莎（337）。这是迄今为止在海峡群岛出版的任何动物分类群的物种总数最多的清单；尽管如此，我们认为清单仍只是初步的。我们提供的证据表明，海峡群岛甲虫的清查和分类工作远未完成。稀疏估计表明，从这些岛屿上记录的甲虫物种至少还有数百种。尽管现有记录的不完整性，但我们发现物种多样性与岛屿面积高度相关。我们报告了 56 种假定为地理上限制（特有）在海峡群岛的物种，另外还有两种具有疑问的特有状态的物种。我们还报告了来自这些岛屿的 52 种不在南加州地区原生的物种。
