Asia-Tropical: Lesser Sunda Is. present, Lombok present
Malesia: Lesser Sunda Islands (Lombok, known from the type and Elbert 673, Rindjani Mts)).
Sections of fertile pinnae of Elbert 673 show a series of vascular strands underlying the narrow fertile surface area, indicating a venation as in T. hilocarpa but closer. Fertile pinnae of the type have inrolled margins (due to immaturity?) and therefore appear narrower, but do not otherwise differ.