KEY TO THE SPECIES

1Sori superficial, stipes to 13 cm long, rhizome without sclerenchyma strands, vascular strands without bundle sheaths
Thylacopteris diaphana
1'Sori deeply sunken, stipes to 22 cm long, rhizome with sclerenchyma strands, vascular strands with bundle sheaths
Thylacopteris papillosa