It contains a single species, Clarkeophlebia argentea, and is apparently endemic to Fatu Hiva in the Marquesas Islands of Polynesia.
C. argentea is a tiny "micromoth" with a generally hairless and smooth body and a wingspan of only 5 mm in the only known specimen (a male).
The legs are glossy, with the fore- and midlegs a smooth and shiny grey except for the black tarsi; the first two tarsus segments are white-tipped.
[1] The straight-margined forewings are fringed with thort hairs and otherwise smooth, lance-shaped and pointed, with an almost straight leading and an oblique outer edge, and have 11 veins.
Of these, lb is simple at the base and ends in a broad and shallow pit from which rises a short stout spine.
The clasper's harpe is broad at the base, with a short and barely constrained neck; the cucullus narrows towards the tip, the brachia are long and curved and expand tipward, and the tegumen is shorter than wide.
There, the habitat is heavily influenced by human activity, and includes plants such as Artocarpus species, Papaya (Carica papaya), Coconut (Cocos nucifera), Sea Hibiscus (Hibiscus tiliaceus), Indian Mango (Mangifera indica), Musa (bananas), Thatch Screwpine (Pandanus tectorius), the paspalum grass Paspalum paniculatum, Apple Guava (Psidium guajava), Tamarind (Tamarindus indica), Portia Tree (Thespesia populnea), as well as Cyperaceae sedges, lichens and mosses.
It is unlikely, however, that these moths use the non-native species as foodplants, and the only known specimen may have been a vagrant from less disturbed habitat higher up Omo'a Valley.
There, native plants such as Bidens henryi, Cheirodendron bastardianum, Pandanus, and East Polynesian Blueberry (Vaccinium cereum) are still more plentiful, and it may be that the species' larval foodplants are found among these.