Stigmella fervida
Encyclopedia
Stigmella fervida 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 Nepticulidae
Nepticulidae
Nepticulidae is a family of very small moths with a worldwide distribution. They are characterised by eyecaps over the eyes . These pigmy moths or midget moths, as they are commonly known, include the smallest of all living moths, with a wingspan that can be as little as 3 mm...

 family. It is found in Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 (Primorskiy Kray) and China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 (Heilongjiang).

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 4.2-5.4 mm. There are two generations per year. Adults are on wing in June–July and again in spring, although this second generation is only from larvae.

The larvae feed on Quercus mongolica
Quercus mongolica
Quercus mongolica, commonly known as Mongolian Oak, is a species of oak native to Japan, southern Kuriles, Sakhalin, Manchuria, Korea, eastern Mongolia, and eastern Siberia. The species can grow to be 30 m tall....

. They mine the leaves of their host plant. The mine consists of an extremely contorted gallery, doubling back several times, closely following the earlier track, thus forming a brown dot. The leaf surrounding the mine stains pale brown. Later, the mine widens, but continues to double back, only in its final part it may follow a looser course. The mine only rarely crosses a vein.

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