Thrinchostoma orthonnae [!] Cockerell, 1908: 343–344, FFF. Female holotype: Angola, Benguella hinterland, on Othonna sp., leg. Wellmann (BMNH).

Thrinchostoma othonnae Cockerell: Cockerell 1910: 506;
Thrincostoma [!](Thrincostoma [!]) othonnae Cockerell: Blüthgen 1930: 496, 499, 540–541.
Thrinchostoma (Thrinchostoma) othonnae Cockerell: Michener 1978: 524; Pauly 1999: 155, 175.

Diagnosis. The type is a small female (body length 7.5 mm) similar to T. productum but the vertex is more shining and less punctuated, T1 less chagrined and with more spaced punctuation.
Male : unknown.