S. hymenophyllum is the most common of the four Tasmanian species and has previously been called S. podophylla. When well developed, this species may easily be mistaken for Hymenophyton flabellatum but usually has a wider thallus and less branching than the latter species. Less well-developed or irregularly lobed specimens can easily be mistaken for Podomitrium but Podomitrium has wavy margins while S. hymenophyllum has toothed ones.

A more uncommon species, S. interrupta, has an unbranched thallus consisting of narrow and broad sections. 

Two additional species S. lehmanniana and S. rhodina, are very poorly known and requires further clarification on their taxonomic validity.