The Butterfly Society of Japan 日本蝶類学会



Rare and Interesting Butterflies of the world


File5: ロスチャイルドトリバネアゲハ
Ornithoptera rothschildi KENRICK, 1911

Ornithoptera rothschildi ♂:表面 Male, upperside


Ornithoptera rothschildi ♂:裏面 Male, underside

狭義のトリバネアゲハとしては最後に発見された種で、インドネシア・イリアンジャヤのアルファック山脈のみから知られる。今でこそ現地から送られてくる標本を見るのは難しくなくなったが、かつては美麗さと稀少さでその人気をほしいままにした。現在でも分布域は極めて狭く、生きた姿を見るのは困難を極める。

 本種を再発見したのは日本人採集家、西澤孝氏(1952〜)である。西澤氏は1973年からじつに6回にわたって西イリアンを訪れた。1974年、西澤氏は2度目の遠征で、人跡稀なジャングルの奥地でロスチャイルドトリバネアゲハを再発見した。西澤氏自身の記述を以下に掲げる。

「うっそうとした膝丈もある下草も、あまり気にならなくなった。どの位、時間がたったのだろうか。今度は前方の林の切れ目の樹冠からゆっくりとおりてきた。こちらの動きは気づいていないのか、ロスチャイルドは羽ばたいて近づいてくる。息を殺して慎重にかまえネットを振り抜いた。ネットの中は確認するまでもなく、手ごたえは充分だった。…64年前、ロスチャイルドトリバネ発見者プラット兄弟がこの地を後にして以来、手つかずのアルファック山脈に分入り、ロスチャイルドトリバネを採る事ができたのだ」

【西澤孝、アルファック山脈探検採集記、トリバネアゲハの世界(1998)近藤典生・西田誠編著 進化生物学研究所 信山社 91ページより抜粋】
 
 図示したのは西澤孝氏自身の1974年の採集品。本学会が事務局を置いている進化生物学研究所は当時、西澤氏の努力を称え、西澤氏からこの標本を買い取ったという。野外品らしく傷んでいるが、熱かった時代を感じさせる素晴らしい標本である。


Data: ♂ Anggi Districts, Irian Jaya, INDONESIA Feb. 18, 1974 Leg: NISHIZAWA, Takashi
Preserved in RIEB (Research Institute of Evolutionary Biology), Tokyo JAPAN
This magnificent species is the last Ornithoptera species which was discovered from Arfak Mountains in Irian Jaya, INDONESIA. Its distribution is limited to small area in Arfak Mountains. Now it is not so difficult to see and obtain specimens of this species, however it is still very hard to see living butterfly in nature. It used to be very popular among butterfly lovers because of its extreme rarity and beauty.
The person who rediscovered this species after a long absence is a famous exploratory butterfly hunter Mr. NISHIZAWA Takashi (1952-). He has visited West Irian six times since 1973. On his second expedition, he finally discovered this species in deep and remote jungle in Arfak Mountains. The following note is written by him.

--- I did not care deep bush up to my knee anymore. I did not recognize how many hours had passed. Finally the butterfly slowly flew down from the canopy of the jungle. The butterfly did not seem to notice me because it came nearer and nearer toward me. I killed my breath and then snapped my net swiftly. Without checking inside the net, I felt strong belief that I got it. --- I became the man who caught the Rothschild’s Birdwing (Ornithoptera rothschildi) by himself for the first time after Pratt brothers (the discoverer of this species) had left here 64 years ago.
[Nishizawa (1998) in Kondo & Nishida, “The World of the Birdwing Butterfly”. RIEB, Tokyo]

 This displayed specimen is collected in 1974 by Mr. NISHIZAWA Takashi. The Research Institute of Evolutionary Biology (RIEB, our society’s secretariat is housed) admired his striking effort and bought this specimen from him. This butterfly is slightly damaged because it was captured in wild, however this specimen vividly reminds “the Golden Age” (1970’s-1980’s) when many Japanese researchers were actively visiting many remote overseas areas.

Data: ♂ Anggi Districts, Irian Jaya, INDONESIA Feb. 18, 1974 Leg: NISHIZAWA, Takashi
Preserved in RIEB (Research Institute of Evolutionary Biology), Tokyo JAPAN


File:4  ユキワリワモン
Allaemona prasopsuki Nishimura, 1999

Allaemona prasopsuk ♂:表面 Male, upperside


Allaemona prasopsuk ♂:裏面 Male, underside

1999年になって新属新種で記載されたワモンチョウの新顔。ミャンマー最北部、カチン州の特産種で、今のところ他の地域からの記録を聞かない。

近縁属のAemonaとは著しく異なる特異な斑紋で、一見して見分けがつく。カチン州は永らく紛争地帯であったこともあり、外国人の入域が禁止されてきた。熱帯ジャングルから標高5000m級のヒマラヤ山脈最東部の雪山まで多様な環境を擁し、近年に入ってもクロヒカゲ属やゼフィルスで新種の発見が相次いでいる。本種もカチン州の特異で豊かなファウナを物語る種と言える。

記載後、現地から追加で標本も得られているが、とても普通種とは言い難い。

極めて特異な本種の発見はヨーロッパでも驚きを持って受け止められたようで、2001年に発行されたD’Abreraの”The Concise Atlas of Butterflies of the World”でも早速、大英博物館に寄贈されたと思われるホロタイプの表裏が掲載されている。

なお、原記載はネットで閲覧することもできるので興味ある方は下記のアドレスを参照されたい。

http://ci.nii.ac.jp/naid/110007630827

図示した個体はミャンマー・カチン州北東部産。個人蔵。

This conspicuous new species (also established new genus) has been described in 1999 from north Myanmar (Kachin state). It seems endemic to this area and no additional locality has been recorded up to now.

This species is at once recognized from closely related Genus Aemona as its peculiar wing markings. The only known habitat, Kachin state had been closed for foreigners for a long time because of the conflict between Myanmar government and minorities.

This area shows striking environmental diversity from the lowland rainforest to snow-capped mountains up to 5000m (on the far-eastern edge of the Great Himalaya). Recently many new butterfly species especially in both Genus Lethe (Satyrinae) and Zephyrus (Lycaenidae) have been discovered. This species is also one of the good examples of the rich fauna there.

Some additional specimens have been recorded until now after its discovery, however this species is by no means common.

The discovery of this striking species seems rather surprise to European lepidopterists, D’Abrera (2001) introduced the Holotype specimen housed in BMNH in his book ”The Concise Atlas of Butterflies of the World”.

The original description is available on the Internet. The address is as follows;

http://ci.nii.ac.jp/naid/110007630827

This illustrated specimen is captured in north-eastern Kachin state (Myanmar), now preserved in private collection.


File:3  レテノールモルフォ 亜種アウグスティナ
Morpho rhetenor augustinae Le Cerf, 1925

Morpho rhetenor augustinae ♂:表面 Male, upperside


Morpho rhetenor augustinae♀:表面 Female, upperside


当会理事の上原二郎氏はセセリの研究者として知られるが、一方で海外採集経験豊富な採集家としても有名である。上原氏は東南アジアを皮切りに世界各国で採集されているが、最近では中南米に行くことが多い。

採集家としてモルフォやアグリアスといった人気種でも珍稀種を次々に仕留めてきているが、中でも南米・ヴェネズエラのオリノコ川デルタ地帯に特産のレテノールモルフォの亜種、アウグスティナは、上原氏の数多いコレクションの中でも白眉の稀種である。特に♀を自分で採集したのは、日本人では上原氏を除いて誰もいないのではないかと言われている。


Mr. UEHARA Jiro (trustee of our society) is earnestly studying Skippers (Hesperiidae) for decades and described many new species and subspecies from S.E. Asia. He is also known among Japanese butterfly enthusiasts as a skillful butterfly collector who has spent 30 years traveling overseas.

Recently he has been traveling to Latin American countries after visiting and spending much of his time studying butterflies of S. E. Asia. He, as a skillful butterfly collector, has collected many Morpho and Agrias species. Many rare species are kept in his collection; this very rare subspecies of Morpho rhetenor from Orinoco River Delta in Venezuela is one of the most attractive specimens. Females of this subspecies are especially hard to find, and he may be the only Japanese person to have collected one on his own.

[Orinoco River Delta, Venezuela]
Collected by UEHARA, Jiro; Preserved in UEHARA Collection, JAPAN


♂(上)と♀(下) Male (Top) and Female (Bottom)

File:2  マヤアンジェラルリウラナミシジミ
Jamides abdul mayaangelae
Takanami, 1992

Jamides abdul mayaangelae ♂:表面 Male, upperside


Jamides abdul mayaangelae ♂:裏面 Male, underside


東南アジアのシジミ研究家で当会・運営委員の高波雄介氏は人生で2度だけ、入手した蝶を掴む手が震えたことがある。幼少時、近所で生まれて初めてのゼフィルス、ミズイロオナガシジミを採集したときが1回目。そして、2回目がこの蝶を入手した時だ。高波氏の20代と30代の日々はシジミチョウの研究がまさに人生の中心にあった。国内外の図書館に依頼して原記載を集め、標本商の展翅を手伝う代わりにシジミの標本を貰い受け、自身でもフィリピンを皮切りにマレーシアやインドネシアに採集に赴いた。その成果が、大著「ボルネオの蝶」のシジミ篇の上梓に結実することになる。

その高波氏は、1991年のある日、インドネシアの標本商のところで1頭の素晴らしいJamidesに出会うことになる。裏面からは普通種alectoとは変わらぬつまらぬ姿。ところが息を吹きかけて翅表を見た高波氏は息を呑んだ。同時に標本をつまんだ手が震えるのを感じた。まったく予期していなかった熱帯のサンゴ礁の海の色がそこにあった。俄かに種名の検討もつかなかったが、精査の結果、高波氏によりabdulの新亜種として記載された。

Jamides abdulは低地性のシジミで、マレー半島からボルネオ、ジャワにかけて分布し、良いジャングルが残っていないと生息できない。他の亜種は画像のように♂の翅表の瑠璃鱗粉は幾分くすんだ暗い青色。このシメルーエ島の亜種のみが、鮮やかな水色の輝きを持っている。高波氏は「見方によっては別種にする人もいるかもしれない」と語る。

その後も得られた個体数は極めて少なく、いまだに♀は未知。画像は高波氏所蔵の♂。



本亜種(左)と別亜種(中央、右) 
ssp. mayaangelae (left) and another subspecies (middle and right)


Mr. TAKANAMI Yusuke (member of management committee of our society) is known for his works on the Lycaenidae of S. E. Asia. Only twice has he ever experienced great excitement and pleasure from catching a rare butterfly. The first time was when he collected his first “Zephyrus” (Antigius attila) in his neighborhood as a child. And second is when he collected this Jamides species in 1991.

During his 20’s and 30’s, Mr. TAKANAMI spent all of his spare time studying the lycaneids of S.E. Asia. He asked many domestic and overseas libraries to make photocopies of original descriptions and papers. He also held a part-time job to mount butterfly specimens for butterfly dealers. If he had long vacations, he went on a collecting trip to S. E. Asia. All these efforts led him to publish, “Butterflies of Borneo” (1992) [Part 2], which drew a lot of attention as one of the most concise illustrated guides of S.E. Asian lycaenids.

In 1991, he found a magnificent specimen of Jamides at a butterfly dealer in Indonesia. At first sight, the specimen seemed nothing different from very common species (Jamides alecto). But once he checked the upperside of the wings, he was startled at unexpected color. He felt his fingers trembling with great surprise. The upperside color is the same color as some of the most striking coral reefs in S. E. Asia.

After careful examination, the species was identified as a new subspecies of Jamides abdul. This species ranges "Sundaland" except for Palawan and is confined to lowland primary forest. Compared to silvery dull blue of all the other subspecies, only this subspecies from Simeulue Island shows striking shiny blue color in males’ upperside.
Mr. TAKANAMI said, “Some researchers may even describe this subspecies as a good species.”

Almost 20 years have passed since this beautiful small blue butterfly was discovered by Mr. TAKANAMI, and only a few specimens have been obtained since then. Females are still unknown.

File:1  イノレスボルネオフタオシジミ
Sukidion inores (Hewitson, 1872)

Sukidion inores ♂:表面 Male, upperside


Sukidion inores ♂:裏面 Male, underside


東南アジア・ボルネオ島特産の一属一種の奇怪なシジミ。 ♀はウラオビフタオシジミ属(Dacalana)の巨大版のような姿であるが、♂の前翅後縁に見られる毛は他のシジミチョウでは例を見ない、長大かつ奇怪なもの。 裏面に青色鱗を持つ姿も異様としか形容しようがない。

余りの奇怪な姿ゆえか、Seitz(1923)では何故か「アフリカ編」に収録されたという数奇な経緯もある。
近年、ボルネオ北部のクロッカー山脈でポツポツと得られているほか、日本人愛好者によってブルネイでも得られたという情報があるものの、これまでに得られた標本は極めて少なく、その特異な姿と相俟ってまさに東南アジアの数あるシジミチョウの中でも屈指の珍稀種と言える。

図示は元当会理事・故長田志朗コレクションに保管されていた♂。現在は北九州自然史博物館所蔵。



Genus Sukidion comprises of only one species, inores. This unusual species is endemic to Borneo. Females of this species looks like a large Dacalana species, but males are quite unique in their appearance. One of the most striking features of males is that there is an unusual long hair growing from the dorsum in both forewings. Moreover almost one third of the underside of both forewings is covered with shiny blue scales. This conspicuous feature is never seen in any other Lycaenidae spp.

This species has a curious history after its discovery. In the famous books of Seitz, published nearly 100 years ago, this species was erroneously illustrated in an African volume. Some researchers (e.g., Aurivillius, 1923) believed that because of its unusual appearance, this species did not believe it was from Asia.

Recently some specimens have been obtained from Crocker Range in Sabah (Malaysia), and Brunei. However, the total number of the specimens is still very small.

Many Japanese butterfly lovers emphasize that this species is one of the most rare and interesting lycaenids in S. E. Asia.
The figured male specimen is originally in the collection of late Mr. Shilo OSADA (trustee of our society; 1947-2009) and now preserved in the Kitakyushu Museum of Natural History.

[Gn. Serapi, Sarawak, MALAYSIA, October, 2, 1989]
Preserved in the Kitakyushu Museum of Natural History, JAPAN