Euchoeca
Euchoeca is a monotypic moth genus in the family Geometridae erected by Jacob Hübner in 1823. Its only species, Euchoeca nebulata, the dingy shell, was described by Giovanni Antonio Scopoli in 1763. It is found in the Palearctic realm, from Europe across Russia to Japan. The wingspan is . The ground colour of the forewing is sandy brown or orange cream. The wings have very fine and faint darker cross lines and creamy-brown chequered fringes. There is a double curve on the termen of the hindwing.The caterpillar is green, with three lines along the dorsum, the central one  dark green, and the others yellow and a purple stripe runs along under the spiracles. In another form the general colour is greyish with a reddish-brown stripe along the back, and series of spots of the same colour along the sides. The moth flies from April to September depending on the location. The larvae feed on birch and alder in damp woodland, fens and other marshy areas.