Usually, ferns have their spore-bearing structures (or sori) on the surface of the frond or lamina (e.g., Polypodium glycyrrhiza). Sometimes, as in Adiantum shastense (see image in comments), the sori are marginal or on the edge of the frond. A third scenario is presented today: stalked marginal sori that extend from the tips of the veinlets.
The Tectariaceae contains 7 genera and 250 or so species, with Tectaria being the largest representative (ca. 200 species). The family is pantropical; only a few representatives can be found in temperate regions.
Tectaria moorei is endemic to the botanical wonderland of New Caledonia; this small archipelago is also the home of the world’s largest living fern (Cyathea intermedia) and the world’s only known parasitic gymnosperm (Parasitaxus usta). To explore the unique (and we never use that word lightly on BPotD) flora and fauna of New Caledonia, visit Endemia – the Flora and Fauna of New Caledonia. Along with Tectaria moorei (additional photographs!), they feature over 3000 endemics in this region of < 19 000 km2. To put that in perspective for local readers, that would be the equivalent of 6 species found nowhere else in the world within the city limits of Vancouver.