| Nemophora congruella | |
|---|---|
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| Museum specimen | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Adelidae |
| Genus: | Nemophora |
| Species: | N. congruella |
| Binomial name | |
| Nemophora congruella (Zeller, 1839) | |
| Synonyms | |
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Nemophora congruella is a species of moth in the family Adelidae. [1]
This infrequent transpalaearctic species is present from France and Belgium to Poland and Romania and from Denmark to Italy. It is also present in Russia. [2]
These moths live in mountain regions with deciduous and coniferous trees. [3]
The wingspan of Nemophora congruella can reach 15–17 millimetres (0.59–0.67 in). [4] The head is dark brown, with dark yellow hair-like scales. The males have filiform antennae 2.5 times longer than the front wing length, while the females have much shorter antennae. The thorax has a bronzy golden shining. The dominant colour of the forewings is shiny golden yellow-orange, with longitudinal violet black streaks. [3] [4]
Forewings have a broad transversal yellow fascia across the whole wings width at about 2/3 of forewing length. This central band is framed by two lead-gray bands with a black border. These two bands are nearly as broad as the central yellow part. The basal part of the wings have three longitudinal lead-gray, blueish-violet shining stripes reaching the transversal fascia. Rear wings are brownish gray. [3]
Nemophora congruella is very similar to Nemophora degeerella and Nemophora amatella , but in these two species the dominant forewing colour is dark, while Nemophora congruella shows lighter colours. The forewing fascia in N. congruella is located closer to the base. [5] Nemophora congruella is slightly smaller and the forewings markings are bright yellow instead of almost leather-brown. The cross-fascia is more straight. [3]
The adults fly from early May till June. [3] The larvae feed on Picea abies . [4]