Stigmella gimmonella
Encyclopedia
Stigmella gimmonella is a moth
of the Nepticulidae
family. It is only known from Hokkaido
in Japan
.
Adults are on wing from July to August and from May to June. There are probably two generations per year.
The larvae feed on Ulmus laciniata and Ulmus davidiana var. japonica. They mine the leaves of their host plant. The mine consists of a linear, thin gallery, which sometimes partly follows the leafmargin or a vein. The first one third of the mine is filled with frass occupying about the thirds of the width of the gallery and leaving very thin clear margins. The frass in the second one third of the mine is linear (similarly to the preceding) but a little broader, occupying the central part of the track up to half the width. In the remaining one third of the mine, the frass becomes sparse and is arranged in a line, which is narrower than the preceding in most mines. In a few mines, the frass is very thin and linear throughout its length.
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 only known from Hokkaido
Hokkaido
, formerly known as Ezo, Yezo, Yeso, or Yesso, is Japan's second largest island; it is also the largest and northernmost of Japan's 47 prefectural-level subdivisions. The Tsugaru Strait separates Hokkaido from Honshu, although the two islands are connected by the underwater railway Seikan Tunnel...
in Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
.
Adults are on wing from July to August and from May to June. There are probably two generations per year.
The larvae feed on Ulmus laciniata and Ulmus davidiana var. japonica. They mine the leaves of their host plant. The mine consists of a linear, thin gallery, which sometimes partly follows the leafmargin or a vein. The first one third of the mine is filled with frass occupying about the thirds of the width of the gallery and leaving very thin clear margins. The frass in the second one third of the mine is linear (similarly to the preceding) but a little broader, occupying the central part of the track up to half the width. In the remaining one third of the mine, the frass becomes sparse and is arranged in a line, which is narrower than the preceding in most mines. In a few mines, the frass is very thin and linear throughout its length.