Psilochasmus
(tree size 5)
Apopharynx
(tree size 1)
Astacotrema
(tree size 1)
Psilorchis
(tree size 2)
Psilotrema
(tree size 10)
Neopsilotrema
(tree size 3)
Byrdtrema
(tree size 1)
Longisaccus
(tree size 1)
Macracetabulum
(tree size 1)
Psilostominae
Ribeiroiinae
Sphaeridiotrematinae