Meinungeria mouensis is described as a new genus and species of the Lepidoziaceae from New Caledonia. The new taxon is characterized by white to light green, worm-like, creeping, nearly leafless stems. It differs from all other genera of the Lepidoziaceae in its unique stem anatomy and in the presence of reduced leaves and underleaves composed of 3–4 radially arranged single cells. The transverse section of the stem is composed of a large-celled echlorophyllose hyaloderm (of 9–11 cells with thickened radial walls becoming thicker from the inner to the outer side) surrounding a single layer of 8–9 smaller, thin-walled, chlorophyllose cells and a central strand of 5–7 echlorophyllose, thick-walled cells with yellowish to light brown walls.

The species were found on open soil in maquis vegetation on ultrabasic substrates in the southeastern part of the island.