Checklists provide information about the species found in a defined region and serve as baselines for detecting species range expansions, contractions, or introductions. Bees are a diverse and important group of insect pollinators. Although some bee populations are declining, these patterns are difficult to document and generalize due to a lack of long-term studies for most localities. Documenting the diversity of wild bee communities is critical for assessing pollination services, community ecology, and geographical and temporal changes in distribution and density. Here, an updated checklist of the bees of the Commonwealth of Pennsylvania, USA, is presented. Since the first checklist was published (2010; 372 species), thousands of additional specimens from the state have been collected and databased, new species have been described in the region, and the taxonomic status of some species have changed. Specimen data from insect collections, databases, scientific literature, and unpublished records were compared to the original checklist. Seventy-nine new state species records – including 49 first-time reports – representing five of the six bee families in North America, were documented resulting in a total of at least 437 bee JHR 77: 1–86 (2020) doi: 10.3897/jhr.77.49622 http://jhr.pensoft.net Copyright Shelby Kerrin Kilpatrick et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CHECKLIST Shelby Kerrin Kilpatrick et al. / Journal of Hymenoptera Research 77: 1–86 (2020) 2 species reported from Pennsylvania. We highlight new county records and species persistence details. Our list includes a total of 23 exotic species and at least five species of conservation concern. Lists of species excluded from the state checklist and species anticipated to occur in Pennsylvania are also included. This checklist provides baseline data for researchers and the public. The benefits of insect collections, specimen databases, determination and voucher labels, and georeferencing to biodiversity studies and other aspects of biological research are also discussed.

中文翻译：

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美国宾夕法尼亚州蜜蜂（膜翅目、Apoidea、Anthophila）的更新清单

检查表提供有关在特定区域发现的物种的信息，并作为检测物种范围扩大、收缩或引入的基线。蜜蜂是一个多样化且重要的昆虫传粉者群体。尽管一些蜜蜂种群正在下降，但由于缺乏对大多数地方的长期研究，这些模式难以记录和概括。记录野生蜜蜂群落的多样性对于评估授粉服务、群落生态以及分布和密度的地理和时间变化至关重要。此处提供了美国宾夕法尼亚联邦蜜蜂的更新清单。自从第一份清单发布（2010 年；372 种）以来，已经收集并建立了该州的数千个额外标本，并在该地区描述了新物种，并且某些物种的分类地位发生了变化。来自昆虫收藏、数据库、科学文献和未发表记录的样本数据与原始清单进行了比较。记录了代表北美六个蜜蜂科中的五个的 79 个新州物种记录（包括 49 个首次报告），导致总共至少有 437 只蜜蜂 JHR 77: 1–86 (2020) doi: 10.3897/ jhr.77.49622 http://jhr.pensoft.net 版权所有 Shelby Kerrin Kilpatrick 等。这是一篇根据知识共享署名许可 (CC BY 4.0) 条款分发的开放获取文章，该许可允许在任何媒体中不受限制地使用、分发和复制，前提是注明原作者和来源。清单 Shelby Kerrin Kilpatrick 等人。/ 膜翅目研究杂志 77：宾夕法尼亚州报告了 1–86 (2020) 2 种。我们强调了新的县记录和物种持久性细节。我们的清单包括总共 23 种外来物种和至少 5 种受保护的物种。州清单中排除的物种清单和预计将在宾夕法尼亚州出现的物种清单也包括在内。该清单为研究人员和公众提供了基线数据。还讨论了昆虫收藏、标本数据库、测定和凭证标签以及地理配准对生物多样性研究和生物研究的其他方面的好处。州清单中排除的物种清单和预计将在宾夕法尼亚州出现的物种清单也包括在内。该清单为研究人员和公众提供了基线数据。还讨论了昆虫收藏、标本数据库、测定和凭证标签以及地理配准对生物多样性研究和生物研究的其他方面的好处。州清单中排除的物种清单和预计将在宾夕法尼亚州出现的物种清单也包括在内。该清单为研究人员和公众提供了基线数据。还讨论了昆虫收藏、标本数据库、测定和凭证标签以及地理配准对生物多样性研究和生物研究的其他方面的好处。