''Brevis crassiductus'' is the only species in the

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

genus ''Brevis'' of the family

Erebidae The Erebidae are a family of moths in the superfamily Noctuoidea. The family is among the largest families of moths by species count and contains a wide variety of well-known macromoth groups. The family includes the underwings ('' Catocala'') ...

. It is known from the mountains of south-central

Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...

. Both the genus and the species were first described by Michael Fibiger in 2008. Adults have been found in October. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is about 9 mm. The forewing is long, narrow and pointed at the apex. It is light grey, although it is blackish subterminally and at the costal ends of the antemedial and postmedial lines. There is a single, indistinct crossline. The subterminal line is weakly marked, while the terminal line is marked by black interveinal dots. The hindwing is light greyish but darker towards the termen. The fringes are whitish. There is an indistinct discal spot present. The underside of both wings is light greyish with an indistinct discal spot.

References

* Micronoctuini Noctuoidea genera Moths described in 2008 {{Micronoctuini-stub