Sheffield CS. A review of the Stelidium group of Stelis Panzer, 1806 (Hymenoptera: Megachilidae) with two new species from western North America. Zootaxa [Internet]. 2024 Jan. 25 [cited 2025 Apr. 3];5404(1):134-66. Available from: https://mapress.com/zt/article/view/zootaxa.5404.1.10