Rhigognostis annulatella

Rhigognostis annulatella (ringed diamond-back or annulated smudge) is a moth of the family Plutellidae. It is found in most of Europe.

Illustration from John Curtis's British Entomology Volume 6

Rhigognostis annulatella
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Lepidoptera
Family:
Plutellidae
Genus:
Rhigognostis
Species:
R. annulatella
Binomial name
Rhigognostis annulatella
(Curtis, 1832)
Synonyms
  • Cerostoma annulatella Curtis, 1832
  • Plutella bicingulata Zeller, 1839

The wingspan is about 18 mm. The head is whitish, with some dark fuscous hairs. Tuft of palpi very short. Forewings light fuscous, much suffused with whitish - ochreous, with scattered dark fuscous strigulae ; an ochreous-whitish dorsal streak from base to tornus, upper edge with triangular projections before and beyond middle, towards base blackish-edged.Hindwings are light grey.The larva is green ; spots black, conspicuous ; head and 2 black-speckled.[1]

Adults are on wing from July onwards, and overwinter in this stage, occurring on the wing until April.

The larvae feed on Cochlearia officinalis. They feed amongst spun leaves and flowers. The pupal cocoon is formed from a network of silk.

References
  1. Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London pdf This article incorporates text from this source, which is in the public domain. Keys and description


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