This is a small species of Hymenophyllum subg. Sphaerocionium. I found it forming large epiphytic colonies on trees in Parque Nacional Las Orquideas in Antioquia, Colombia.
Hymenophyllum fragile

This is a small species of Hymenophyllum subg. Sphaerocionium. I found it forming large epiphytic colonies on trees in Parque Nacional Las Orquideas in Antioquia, Colombia.