Gnathiidae Leach, 1814
Thaumastognathia diceros Monod, 1926A
Thaumastognathia europalothrix Cohen & Poore, 1994
Thaumastognathia metaphone Cohen & Poore, 1994
Thaumastognathia orectognathus Cohen & Poore, 1994
Thaumastognathia tanseimaruae Shimomura & Tanaka, 2008
Thaumastognathia wasmannia Cohen & Poore, 1994
