Parachrostia owadai is a moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 of the Micronoctuidae

Micronoctuidae

The Micronoctuidae are a family of moths that includes about 400 described species. The family was first described in 2005.Micronoctua karsholti is the smallest of all species in the Noctuoidea superfamily.-Taxonomic History:...

 family. It is known from Okinawa, Tokunoshima

Tokunoshima

is an island in the Amami Islands of southwestern Japan. Administatively it belongs to Kagoshima Prefecture. Three towns are located on the island: Tokunoshima, Isen, and Amagi...

 and Iheyajima.

Adults have been found in May, September, October, and November, but probably occur in numerous generations.

The wingspan

Wingspan

The wingspan of an airplane or a bird, is the distance from one wingtip to the other wingtip. For example, the Boeing 777 has a wingspan of about ; and a Wandering Albatross caught in 1965 had a wingspan of , the official record for a living bird.The term wingspan, more technically extent, is...

is 11-13 mm. The forewing is relatively narrow, with a bright, ovoid, yellow reniform stigma. The crosslines are all present, black and waved. The terminal line is marked by tight black interveinal spots. The hindwing is grey, with an indistinct discal spot. The underside of the forewing is brownish grey, without a pattern. The underside of the hindwing is light grey, with a discal spot.