''Papilio protenor'', the spangle, is a butterfly found in India belonging to the swallowtail family.

Morphology

Male

''Upperside'': velvety indigo-blue black, duller on the forewing than on the hindwing. Forewing with pale adnervular streaks broadened along the terminal margin and extended well into the cell. Hindwing: a broad pale yellowish-white sub

costal Costal may refer to: * an adjective related to the rib () in anatomy ** Costal cartilage, a type of cartilage forming bars which serve to prolong the ribs forward ** Costal margin, the medial margin formed by the false ribs ** Costal surface (disa ...

streak; interspaces 4 to 6 irrorated (sprinkled) with bluish scales; tornal angle marked with red. ''Underside'': forewing dull black; adnervular streaks distinctly grey and much broader than on the upperside. Hindwing: ground colour as on the upperside, a large irregularly-shaped patch at the tornal angle that extends into interspace 2, and subterminal lunules in interspaces 2, 6, and 7 dull pinkish-red, cell irrorated more-or-less with a sprinkling of blue scales; the tornal patch with a black, outwardly blue-edged, round medial spot, and interspaces 4 and 5 with subterminal irrorations of blue scales. Antennae black; head, thorax and abdomen dark brownish-black.

Female

Similar to male. ''Upperside'': ground colour deep brownish-black; adnervular streaks on forewing yellowish; irroration of blue scales on outer portions of hindwing more dense; no white subcostal streak; red patch at tornal angle large with an oval medial black spot; another similar black spot subterminally in interspace 2 posteriorly bordered by a crescent-shaped red mark. ''Underside'': similar to that in the male, differs in the adnervular streaks on the forewing that are broader and paler; on the hindwing the tornal red patch is paler and larger, and is extended broadly anteriorly and outwards towards the

termen Termen is a municipality in the district of Brig in the canton of Valais in Switzerland. History Termen is first mentioned in 1201 as ''Terman''. Geography Termen has an area, , of . Of this area, 42.2% is used for agricultural purposes, wh ...

into interspace 2; in the latter it coalesces with a broad subterminal black-centred red

ocellus A simple eye (sometimes called a pigment pit) refers to a form of eye or an optical arrangement composed of a single lens and without an elaborate retina such as occurs in most vertebrates. In this sense "simple eye" is distinct from a multi-l ...

; the irroration of blue scales in interspace 5 with a small subterminal red lunule below it. Antennae, head, thorax and abdomen as in the male.

Sexual Dimorphism

Scientists have found that between the male and female, there are higher amounts of

linalool Linalool () refers to two enantiomers of a naturally occurring terpene alcohol found in many flowers and spice plants. Linalool has multiple commercial applications, the majority of which are based on its pleasant scent (floral, with a touch of ...

and

2,3-butanediol 2,3-Butanediol is the organic compound with the formula (CH3CHOH)2. It is classified as a ''vic''-diol ( glycol). It exists as three stereoisomers, a chiral pair and the meso isomer. All are colorless liquids. Applications include precursors ...

present in the male than in the female. The male also elicits stronger odour than female.

Range

Northern Pakistan Northern Pakistan () is a tourism region in the northern and northwestern parts of Pakistan, comprising the administrative units of Gilgit-Baltistan (formerly known as '' Northern Areas''), Azad Kashmir, Khyber Pakhtunkhwa, and the Pothohar P ...

, Jammu and Kashmir,

Garhwal Himalaya The Garhwal Himalayas are mountain ranges located in the Indian state of Uttarakhand. Geology This range is also a part of Himalaya Sivalik Hills, the outer most hills of the Himalaya located in Himachal Pradesh and Uttarakhand. Major peaks ...

( Govind Wildlife Sanctuary),

Sikkim Sikkim (; ) is a state in Northeastern India. It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Province No. 1 of Nepal in the west and West Bengal in the south. Sikkim is also close to the Silig ...

Assam Assam (; ) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur ...

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mos ...

Burma Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...

, southern China (including

Hainan Hainan (, ; ) is the smallest and southernmost province of the People's Republic of China (PRC), consisting of various islands in the South China Sea. , the largest and most populous island in China,The island of Taiwan, which is slightly l ...

), northern

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

, northern Laos,

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...

North Korea North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korean Peninsula and shares borders with China and Russia to the north, at the Yalu (Amnok) and T ...

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its eas ...

and Japan.

Nepal Nepal (; ne, :ne:नेपाल, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in S ...

Habitat

Many species of butterfly occupy only a limited range of the host plant. They utilize the plant chemicals to assess potential host plants and decide if or not to

oviposit The ovipositor is a tube-like organ used by some animals, especially insects, for the laying of eggs. In insects, an ovipositor consists of a maximum of three pairs of appendages. The details and morphology of the ovipositor vary, but typical ...

on them. Most species in the genus ''

Papilio ''Papilio'' is a genus in the swallowtail butterfly family, Papilionidae, as well as the only representative of the tribe Papilionini. The word ''papilio'' is Latin for butterfly. It includes the common yellow swallowtail (''Papilio machaon''), ...

'' exclusively use rutaceous plants (

rutaceae The Rutaceae is a family, commonly known as the rueRUTACEAE
in BoDD – Botanical Der ...

) as host plant, and ''Papilio protenor'' is a specialist. Their major host plant is

citrus ''Citrus'' is a genus of flowering trees and shrubs in the rue family, Rutaceae. Plants in the genus produce citrus fruits, including important crops such as oranges, lemons, grapefruits, pomelos, and limes. The genus ''Citrus'' is native to ...

. Research indicates high affinity of the female for ''

Citrus unshiu ''Citrus unshiu'' is a semi-seedless and easy-peeling citrus species, also known as miyagawa mandarin, unshu mikan, cold hardy mandarin, satsuma mandarin, satsuma orange, naartjie, and tangerine. ''Citrus unshiu'' was named after Unshu (Wenzho ...

''. There are various oviposition stimulants discovered, including sugar acid,

amino acid Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha a ...

alkaloid Alkaloids are a class of basic, naturally occurring organic compounds that contain at least one nitrogen atom. This group also includes some related compounds with neutral and even weakly acidic properties. Some synthetic compounds of similar ...

and flavonoid. Flavanone glycosides such as

naringin Naringin is a flavanone-7-''O''- glycoside between the flavanone naringenin and the disaccharide neohesperidose. The flavonoid naringin occurs naturally in citrus fruits, especially in grapefruit, where naringin is responsible for the fruit' ...

and

hesperidin Hesperidin is a flavanone glycoside found in citrus fruits. Its aglycone form is called hesperetin. Its name is derived from the word "hesperidium", for fruit produced by citrus trees. Hesperidin was first isolated in 1828 by French chemist M. ...

were investigated and both elicited positive responses from the female adults. Females do not oviposit on ''

Phellodendron amurense ''Phellodendron amurense'' is a species of tree in the family Rutaceae, commonly called the Amur cork tree. It is a major source of '' huáng bò'' ( or 黄檗), one of the 50 fundamental herbs used in traditional Chinese medicine. The Ainu pe ...

''. The avoidance is attributed to high concentration of phellamurin. Researchers have found different adaptation to different host plants between adult females and larvae. For example, females are able to oviposit on '' Trollius asiaticus'', but larvae fail to grow on it. Also, while the female adults are not able to oviposit on ''

'', larvae are found to be able to live on it. ''Papilio protenor'' males appear to be more site faithful than females.

Status

Common; not threatened.

Life history

Larva

"Green, with a yellow collar and brown lichen-like markings. Feeds on ''

Zanthoxylum ''Zanthoxylum'' is a genus of about 250 species of deciduous and evergreen trees, shrubs and climbers in the family Rutaceae that are native to warm temperate and subtropical areas worldwide. It is the type genus of the tribe Zanthoxyleae in ...

alatum''." (Mackinnon, quoted in Bingham.) Experiments have been conducted on larvae of different

instar An instar (, from the Latin '' īnstar'', "form", "likeness") is a developmental stage of arthropods, such as insects, between each moult (''ecdysis''), until sexual maturity is reached. Arthropods must shed the exoskeleton in order to grow or ...

s, and it is revealed that among all the different instars, there are significant differences of chemical composition of osmeterial secretion between the 5th instar and all the previous instars. 5th larvae secretion is mainly aliphatic acid and their esters, while the previous instars contain primarily mono- and sesquiterpenoids. Scientists suspect that these differences are associated with the colouration of the 4th larval ecdysis.

Pupa

"Some pupae are coloured like rough bark, others are uniformly green." (Mackinnon, quoted in Bingham.) There are two colour-types in ''Papilio'' butterflies, green and brown. Pupae that grow on green-coloured branches are always green, while those that live on dead branches are brown in colour. Light condition does not seem to affect this relation. The green pigment is described as a "insectoverdin" type, which means it is a mixture of yellow and blue chromoproteins. The chemical compounds separated from the green pupae (e.g., beta-carotene and

lutein Lutein (;"Lutein"

issued a

postage stamp A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail), who then affix the stamp to the f ...

depicting ''Papilio protenor''.

References

{{Taxonbar, from=Q556874 Fauna of Pakistan protenor Butterflies of Indochina Taxa named by Pieter Cramer Butterflies described in 1775