- Tytthonyx (Thinalmus) rufiventris Zaragoza-Caballero, 200 1

Holotype: ♂. MEXICO: Baja California Sur. Las Barrancas, ca. 30 km E. Santiago, 22-30/XI/1982. Col. Paul DeBach, Malaise trap.

Conservation status: Complete, wing and genitalia on card.