''Polyommatus thersites'', the Chapman's blue, is a butterfly in the family

Lycaenidae Lycaenidae is the second-largest family of butterflies (behind Nymphalidae, brush-footed butterflies), with over 6,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 30% of the known butterfl ...

. It is found in southern Europe,

Morocco Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to ...

Lebanon Lebanon ( , ar, لُبْنَان, translit=lubnān, ), officially the Republic of Lebanon () or the Lebanese Republic, is a country in Western Asia. It is located between Syria to the north and east and Israel to the south, while Cyprus li ...

Asia Minor Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The re ...

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

and across the

Palearctic The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Sibe ...

Siberia Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of ...

and

Tian Shan The Tian Shan,, , otk, 𐰴𐰣 𐱅𐰭𐰼𐰃, , tr, Tanrı Dağı, mn, Тэнгэр уул, , ug, تەڭرىتاغ, , , kk, Тәңіртауы / Алатау, , , ky, Теңир-Тоо / Ала-Тоо, , , uz, Tyan-Shan / Tangritog‘ ...

. It is a small butterfly with both generation dimorphism and sexual dimorphism. For the first generation the upperside is blue with grey hind-wings and in the female a sub-marginal line of orange spots. The summer generation of the female is brown with the same sub-marginal line of orange spots while they are absent in the lighter male. Representatives of both sexes have in the spring generation grey-colored hindwing undersides while (sandy brown in the summer generation). The underside is ochre marked with black dots circled in white and decorated with a sub-marginal line of orange spots. The forewing underside is yellow grey in summer females. ''Polyommatus thersites'' is similar to ''

Polyommatus icarus The common blue butterfly or European common blue (''Polyommatus icarus'') is a butterfly in the family Lycaenidae and subfamily Polyommatinae. The butterfly is found throughout the Palearctic. Butterflies in the Polyommatinae are collectively c ...

'', but they are smaller and both sexes have no basal spots on the underside of the forewing . The larva feeds on ''

Onobrychis __NOTOC__ ''Onobrychis'', the sainfoins, are a genus of Eurasian perennial herbaceous plants of the legume family (Fabaceae). Including doubtfully distinct species and provisionally accepted taxa, about 150 species are presently known. The Flora ...

'' species ('' O. arenaria'', '' O. peduncularis'', '' O. sativa'' and '' O. viciifolia'')

Subspecies

Two

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

are recognized: *''P. t. thersites'' (Europe, south-western

Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historically ...

Armenia Armenia (), , group=pron officially the Republic of Armenia,, is a landlocked country in the Armenian Highlands of Western Asia.The UNbr>classification of world regions places Armenia in Western Asia; the CIA World Factbook , , and ''Ox ...

Talysh Mountains Talysh Mountains ( tly, Tolışə Bandon, script=Latn, fa, کوه‌های تالش, Kuhhâye Tâleš; az, Talış dağları) is a mountain range in far southeastern Azerbaijan and far northwestern Iran within Ardabil Province and Gilan Provin ...

Kopet Dag The Köpet Dag, Kopet Dagh, or Koppeh Dagh ( tk, Köpetdag; fa, کپه‌داغ), also known as the Turkmen-Khorasan Mountain Range, is a mountain range on the border between Turkmenistan and Iran that extends about along the border southeast o ...

) *''P. t. orientis'' (Sheljuzhko, 1928) (

Alay Mountains The Alay or Alai Range ( ky, Алай тоо кыркасы; russian: Алайский хребет) is a mountain range that extends from the Tien Shan mountain range in Kyrgyzstan west into Tajikistan. It is part of the Pamir-Alay mountain syste ...

, northern

Dzhungarsky Alatau The Dzungarian Alatau ( mn, Зүүнгарын Алатау, ''Züüngaryn Alatau''; ; kk, Жетісу Алатауы, ''Jetısu Alatauy''; russian: Джунгарский Алатау, ''Dzhungarskiy Alatau'') is a mountain range that lies on t ...

, Altai, Sayan) Chapman's blue (Polyommatus thersites thersites) male underside Bulgaria.jpg, male,

Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedon ...

Chapman's blue (Polyommatus thersites thersites) female underside Italy.jpg, female,

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

{{Taxonbar, from=Q1423288

thersites In Greek mythology, Thersites (; Ancient Greek: Θερσίτης) was a soldier of the Greek army during the Trojan War. Family The ''Iliad'' does not mention his father's name, which may suggest that he should be viewed as a commoner rathe ...

Butterflies of Europe Butterflies of Africa Butterflies of Asia Butterflies described in 1835