Stegopterus obesus was described by Burmeister in 1842 on the basis of a single female from Port Natal (Durban, KwaZulu-Natal, South Africa). The few key characters specified by Burmeister seem to indicate that a Stegopterus may indeed have been involved. This species was not mentioned by Péringuey in his 1907 revision of the Stegopterus species and is therefore treated as incertae sedis. The locality reported on its label is outside of the known range for the genus, and subsequent searches for this species within have led to the conclusion that it is most unlikely that Stegopterus may have reached that province of South Africa. All the currently known species are restricted to the Fynbos and marginal Karoo areas of the Western Cape Province, not even reaching the Eastern Cape Province.
↑Schoolmeesters, P. (2025). "Stegopterus at Catalogue of Life". World Scarabaeidae Database (version 2025-10-07). In O. Bánki, Y. Roskov, M. Döring, G. Ower, D. R. Hernández Robles, C. A. Plata Corredor, T. Stjernegaard Jeppesen, A. Örn, T. Pape, D. Hobern, S. Garnett, H. Little, R. E. DeWalt, J. Miller, T. Orrell, & R. Aalbu, Catalogue of Life (2025-10-10 XR). Amsterdam, Netherlands: Catalogue of Life Foundation. Retrieved May 12, 2026.