Seq # 901600020

Cosmia diffinis (Linnaeus, 1767) Species

Last modified: Sept. 16, 2023, 11:16 a.m.


This very rare, local and decling species has not been seen in Belgium for quite some time.
This moth underwent a rapid decline as a result of Dutch elm disease during the 1980's and also due to destruction of riparian woodlands and dewatering of lowland swamps.


Details

Classification
Family: Noctuidae > Subfamily: Xyleninae > Tribus: Xylenini > Genus: Cosmia > Subgenus: Cosmia > Species: Cosmia diffinis
Vernacular names
Iepenuil (NL), White-spotted Pinion (EN), Le Nacarat (FR), Weißflecken-Ulmeneule (DE)
First mention in Belgium
De Sélys-Longchamps E. 1844. Énumération des insectes Lépidoptères de la Belgique. — Mémoires de la Société royale des Sciences de Liége 2: 1–35. On page 13.
Status

Native


Distribution


Imago

Wingspan: 29–36 mm.

Museum specimens

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Specimens in nature

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Cocoon/pupa

Hibernates as an egg.. The larvae develop between mid-April and mid-June and live between spun leaves.

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Flight periods

The moths fly between mid-June and August.


Observed on

Host plant (species):
Ulmus procera and Ulmus glabra

The larvae feed on Ulmus, especially Ulmus laevis and U. minor.

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