Polyommatus semiargus

Mazarine blue
Male, Estonia
Italy
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Lycaenidae
Genus: Polyommatus
Species: P. semiargus
Binomial name
Polyommatus semiargus
(Rottemburg, 1775)
Synonyms
  • Papilio semiargus Rottemburg, 1775
  • Papilio acis Denis & Schiffermüller, 1775 (preocc. Drury, 1773)
  • Cyaniris argianus Dalman, 1816
  • Cyaniris semiargus (Rottemburg, 1775)
  • Lycaena semiargus (Rottemburg, 1775)

Polyommatus semiargus, the Mazarine blue, is a butterfly in the family Lycaenidae.

Subspecies

Subspecies include:[1]

Distribution

The Mazarine blue's population is distributed throughout continental Europe,[2] even reaching into the Arctic Circle, temperate Asia, Mongolia, Morocco,[1] the Middle East,[3] and Morocco.[4] There was a large native population in Britain in the early part of the 19th century, but it disappeared before the 20th century,[5][6] though single vagrants have been spotted,[7] and some estimates of British resident extinction are as late as 1906.[8] In 2009, UNESCO was researching a possible British reintroduction of the Mazarine blue to Britain.[9]

Recently, the Mazarine blue's numbers have been declining in its European range (particularly Scandinavia) and the reason remains unclear.

Habitat

This common species inhabits meadows, pastures, grasslands and flowery grassy damp areas up to 2200m. It seems to prefer places which are not fertilized and not used for fodder production.[10]

Description

The wingspan of the male and female are similar,[11] at 32–38 mm.[12][10]

These butterflies present a sexual dimorphism. The male Mazarine blue's wings are a deep blue with a heavy venation and are slightly larger in diameter than the female's. The upperside of the wings shows black borders and white fringes.[13] The female Mazarine blue is brown. The underside of the wings is greyish or ocher, with a series of black spots surrounded by white and a blue scaling in the basal area.[13]

Both sexes lack orange markings and have a dark violet or brown body colour. The butterfly has been compared to the common blue, and the Grecian Helena subspecies which has orange markings.[14]

This species is rather similar to Cupido minimus, but in the underside hindwings of the Mazarine blue the black spot in space 6 and the two spots next to it form an obtuse angle, while in C. minimus they create an acute angle.[13]

The larva is yellow green with darker lines and has fine hairs and dark brown spiracles.[15] The pupa is olive green and attached to the food plant with a silk girdle.[16]

Biology

This species has one brood each year. It overwinters as a young larva. Adults fly from May to August.[10] Caterpillars mainly feed on Red Clover (Trifolium pratense) and other species of Trifolium (Trifolium medium, Trifolium spadiceum), on Vicia cracca, Anthyllis, Genista and Melilotus.[1][17]

Bibliography

References

  1. 1 2 3 Funet
  2. ↑ Fauna europaea
  3. ↑ Recorded for example, in Syria: Graves, Philip P. (1905). "Notes on Egyptian and Syrian butterflies". The Entomologist's record and journal of variation. 19.
  4. ↑ "Specimens: Cyaniris semiargus". www.theinsectcollector.com. Retrieved 2010-07-03. Locality: Morocco Sub Species: maroccana
  5. ↑ Eeles, Peter (2002). "UK Butterflies - Mazarine Blue - Cyaniris semiargus". www.ukbutterflies.co.uk. Retrieved 2010-07-03. first mentioned as British in 1710 and there are several hundred sightings recorded up until the late 19th century. Various dates are given for the last sighting, although all are linked with a particular region. The end of the 19th century seems to mark a watershed, after which there are very few records.
  6. ↑ Dennis, Roger (1994). Butterflies and climate change. Manchester University Press. p. 134. ISBN 978-0-7190-4033-7. Retrieved 2010-07-03. four species have become extinct [in Britain] (i.e. Lycaena dispar 1851, Cyaniris semiargus 1877, Aporia crataegi c. 1925, Maculinea arion 1979).
  7. ↑ Watson, L. (2008). "British Insects: Butterflies - Lycaenidae". delta-intkey.com. Retrieved 2010-07-03. Cyaniris semiargus (Mazarine Blue - extinct, now occasionally adventive)
  8. ↑ "How many species have gone extinct in the last 100 years?". www.jncc.gov.uk. Retrieved 2010-07-03.
  9. ↑ "The UNESCO strategy for Action on climate change" (pdf). unesdoc.unesco.org. Retrieved 2010-07-03.
  10. 1 2 3 Simon Coombes Captain's European Butterfly Guide
  11. ↑ "UK Butterflies - Mazarine Blue - Cyaniris semiargus". Retrieved 2010-07-03.
  12. ↑ "Cockayne Collection". Natural History Museum. Retrieved 2010-07-03.
  13. 1 2 3 Matt Rowlings Euro Butterflies
  14. ↑ "Mazarine Blue (Polyommatus semiargus) - Lycaenidae - Lepidoptera - Insecta - Wildaboutdenmark.com". www.fugleognatur.dk. Retrieved 2010-07-03.
  15. ↑ Kimmo Silvonen Larvae of North-European Lepidoptera
  16. ↑ Stokoe, W.J. (1962). Observer's Book of Butterflies. Frederick Warne. p. 131.
  17. ↑ Paolo Mazzei, Daniel Morel, Raniero Panfili Moths and Butterflies of Europe and North Africa
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.