Tmesipteris parva is a fern ally endemic to eastern Australia. Tmesipteris ovata is a fern ally endemic to eastern Australia. Tmesipteris truncata is a fern ally endemic to eastern Australia. Tmesipteris tannensis is a fern ally endemic to New Zealand. Tmesipteris elongata is a fern ally endemic to south eastern Australia and New Zealand. Like other Selaginallales, it is fern ally and not a true fern. Like ferns, a fern ally disperses by shedding spores to initiate an alternation of generations.