Hadronotus sponus (Kozlov & Le) comb. nov.

Gryon sponum Kozlov & Lê, 1992: 235, 238 (original description, assigned to Gryon muscaeforme species group, keyed).

Gryon sponus Kozlov & Lê, 1996: 11 (description); Lê, 2000: 98, 133 (description, keyed, type information).