Citizen science is an increasingly powerful tool to gather large quantities of biological data and to engage the public. The number of citizen science initiatives has rapidly increased in the last 15 years. Invasive alien species such as the harlequin ladybird, Harmonia axyridis (Coleoptera, Coccinellidae), provide a particularly good opportunity for broad-scale use of such initiatives. Harmonia axyridis is parasitized by a fungus, Hesperomyces harmoniae (Ascomycota, Laboulbeniales), that can be found throughout the range of its host. Here we present Beetlehangers.org, a website and data repository where we combine observations of He. harmoniae from literature, online databases, and citizen science initiatives, including new records of both Ha. axyridis and He. harmoniae. Whereas Ha. axyridis is now present in 86 countries across six continents (including seven new country records), the distribution of its parasite He. harmoniae comprises 33 countries in five continents (including two new country records since its description in 2022). We explore spatiotemporal trends of He. harmoniae in light of these records. Finally, we discuss challenges and new opportunities for citizen science in relation to species interactions such as these and provide future perspectives for the website as a home for future Laboulbeniales research and outreach.

公民科学是收集大量生物数据并吸引公众参与的日益强大的工具。过去 15 年里，公民科学倡议的数量迅速增加。丑角瓢虫、异色瓢虫（鞘翅目、瓢虫科）等外来入侵物种为大规模利用此类举措提供了特别好的机会。异色瓢虫由一种真菌Hesperomyces Harmoniae （子囊菌门、Laboulbeniales）寄生，这种真菌可以在其宿主的整个范围内找到。在这里，我们介绍 Beetlehangers.org，一个网站和数据存储库，我们在这里结合了对He 的观察。文献、在线数据库和公民科学倡议中的和谐，包括Ha 的新记录。 axyridis和He。和谐。而哈。 axyridis目前存在于六大洲 86 个国家（包括七个新国家记录），其寄生虫He 分布。 harmoniae涵盖五大洲的 33 个国家（包括自 2022 年描述以来的两项新国家记录）。我们探索 He 的时空趋势。根据这些记录和谐。最后，我们讨论了与诸如此类的物种相互作用有关的公民科学的挑战和新机遇，并为该网站作为未来 Laboulbeniales 研究和推广的家园提供了未来的前景。