''Incurvaria alniella'' is a

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

of the family

Incurvariidae Incurvariidae is a family of small primitive monotrysian moths in the order Lepidoptera. There are twelve genus, genera recognised (Davis, 1999). Many species are leaf miners and much is known of their host plants, excluding ''Paraclemensia aceri ...

. It is found in

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

on the islands of

Honshu , historically known as , is the largest of the four main islands of Japan. It lies between the Pacific Ocean (east) and the Sea of Japan (west). It is the list of islands by area, seventh-largest island in the world, and the list of islands by ...

and

Kyushu is the third-largest island of Japan's Japanese archipelago, four main islands and the most southerly of the four largest islands (i.e. excluding Okinawa Island, Okinawa and the other Ryukyu Islands, Ryukyu (''Nansei'') Ryukyu Islands, Islands ...

.Distributional records and biological notes on Japanese species of the family Incurvariidae (Lepidoptera)
/ref> The

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

is 16-19.5 mm for males and 14–20 mm for females. The larvae feed on '' Alnus japonica''. They create an elliptical case consisting of two pieces of the same size. Pupation takes place within this case in spring.

References

Moths described in 1957 Incurvariidae Moths of Japan {{Incurvarioidea-stub