Greathead DJ.

A sympatric species pair: Spogostylum ocyale (Wiedemann, 1828) and S. griseipenne Macquart, 1850 (Diptera: Bombyliidae)

. Zootaxa [Internet]. 2003 Aug. 22 [cited 2025 Apr. 23];274(1):1–6. Available from: https://mapress.com/zt/article/view/zootaxa.274.1.1