Dusky large blue

The dusky large blue (Phengaris nausithous) is a species of butterfly in the family Lycaenidae. It is found in Armenia,[2] Austria, Azerbaijan, Belarus, Bulgaria, Czech Republic, France, Georgia, Germany, Hungary, Kazakhstan, Moldova, Montenegro, the Netherlands, Poland, Romania, Russia, Slovenia, Spain, Switzerland, and Ukraine.[1][3]

Dusky large blue
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Lepidoptera
Family:
Lycaenidae
Genus:
Phengaris
Species:
P. nausithous
Binomial name
Phengaris nausithous
Synonyms

Glaucopsyche nausithous
Maculinea nausithous (Bergsträsser, 1779)

The life cycle of this species is strongly related to the herbaceous plant Sanguisorba officinalis (great burnet).[1]

Description from Seitz
For a key to the terms used, see Glossary of entomology terms.
Ventral view

L. arcas Rott. (= erebus Knoch) (83 e). Male similar to euphemus, but the female quite black-brown above; particularly recognizable by the underside being coffee-brown and bearing only one row of ocelli, ab. minor Frey are small specimens from Switzerland. In ab. inocellata Sohn the ocelli of the underside are reduced, in ab. lycaonius Schultz they are entirely absent. In the male-ab. lucida Geest the forewing above has the blue lighter and more extended and the black discal spots reduced or obsolete. Throughout Central Europe, from Alsatia to the Ural, Caucasus and Armenia, and from Pommerania and the Lower Rhine to Italy. — Egg like that of euphemus laid on Sanguisorba. The young larva pale, later on purple-brown and finally probably yellowish-brown, at first at the flowers, later on at the leaves of Sanguisorba. The butterflies have exactly the same habits as euphemus, with which they frequently fly together, in July and August; they are usually still more plentiful than euphemus in the places where they occur (damp meadows).[4]

References
  1. World Conservation Monitoring Centre 1996. Phengaris nausithous. 2006 IUCN Red List of Threatened Species. Archived June 27, 2014, at the Wayback Machine Downloaded on 6 October 2010
  2. Phengaris nausithous at Butterfly Conservation Armenia
  3. Popović, Verovnik (2018). Revised Checklist of the Butterflies of Serbia (Lepidoptera: Papilionoidea). Zootaxa 4438 (3): 501–27. https://doi.org/10.11646/zootaxa.4438.3.5.
  4. Seitz, A. ed. Band 1: Abt. 1, Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen Tagfalter, 1909, 379 Seiten, mit 89 kolorierten Tafeln (3470 Figuren)


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