Cyaniris semiargus (Rottemburg, 1775) Species
Last modified: Jan. 15, 2026, 7:19 p.m.
In Flanders the species is critically endangered. A local species occurring in the south of Belgium where it is vulnerable.
Details
- Classification
- Family: Lycaenidae > Subfamily: Polyommatinae > Tribus: Polyommatini > Genus: Cyaniris > Species: Cyaniris semiargus
- Vernacular names
- Klaverblauwtje (NL), Mazarine Blue (EN), Demi-Argus (FR), Rotklee-Bläuling (DE)
- Synonyms
- Cyaniris acis (Denis & Schiffermüller, 1775), nec (Drury, 1773)
- First mention in Belgium
- De Sélys-Longchamps E. 1837. Catalogue des Lépidoptères ou Papillons de la Belgique, précédé du tableau des Libellulines de ce pays. — — : 1–29. On page 17 (as Polyommatus Acis). view page
- Status
-
Native
Distribution
Imago
Museum specimens
No pictures yet!Specimens in nature
Bionomics
The larva is attended by ants of the genus Lasius.
No pictures yet!
Flight periods
The adults fly in two generations a year from mid-May till the end of June, and from mid-July till the end of August. In favourable years a third generation occurs from the beginning of September till early October.
Observed on
- Host plant (species):
- Trifolium pratense
The larva lives on Trifolium pratense.
No pictures yet!
