高度發展的性別二型性與極為保守的成蟲形態特徵使得蓑蛾科種級分類處理一直是形態學上的大挑戰。其中大蓑蛾屬(Eumeta)為一群廣泛分布於亞、澳、非洲大陸，成員外觀上極為相似的分類群，歷史上的混淆始於本屬模式種的錯誤鑑定及標本考證的困難性。早期台灣蓑蛾的分類文獻亦有大蓑蛾屬的紀錄，但實際分布的種數以及其分類地位曖昧不明。本研究大量採集飼養台灣產大蓑蛾屬幼蟲，以獲得包含成蟲雙性別形態、幼蟲發育階段與蓑巢形式的完整資訊，並採用初步的生命條碼相互佐證，確定台灣產有微型大蓑蛾(Eumeta minuscula)與多樣大蓑蛾(E. variegata)兩個種類。同時觀察到多樣大蓑蛾雄蟲普遍具有外部與生殖器形態的高度變異性與不對稱性，其第8 腹節的背、腹片反而是本屬最具有種級鑑定價值的形態特徵。接著檢視本屬的模式標本群與原始文獻，將過去已描述廣泛分布於南亞至東亞陸塊邊緣與島嶼的13 個形態種歸納為東洋種群。除微型大蓑蛾與E. crameri 相對小型且形態穩定可鑑種，其他外觀混亂的種類包含： E.variegata、E. maxima、E. layardi、E. japonica、E. pryeri、E. sikkima、E. wallacei、E. javanica、E. wallacei var. bougainvillea、E. formosicola 以及E. kiushiuana 共11種在此定義為多樣大蓑蛾複合種群（species-complex），以台灣島內的樣本為主要，檢討其分類地位。結果除E. japonica、E. javanica 以及E. kiushiuana 未檢視模式，其餘9 種形態差異符合台灣島內族群的變異程度，因此合併為多樣大蓑蛾。分子證據亦初步支持，然國外鄰近地區的樣本尚不足以代表本種的所有族群遺傳結構。產於中國雲南的例外個體有較高遺傳變異可能為一隱蔽種，其生殖器差異亦較其他個體獨特，因未有保留第8 腹節背、腹片，資料不足而暫處理為存疑種。

There is a great challenge to deal with psychid taxonomy due to the sexual dimorphism and conservative morphology of male. The genus Eumeta is widely distributed among Asia, Australia and Africa, with taxa resembling each other in morphological aspects. This historical confusion was originated from misidentification of type specimen and difficulty of specimen vouchering. Previous studies also recorded Eumeta of Taiwan, but taxa still uncertain actually. In present study, reared specimens were used to acquire morphology of different development and larval case style, and corroborated each other with barcode of life. As the results, Eumeta minuscula and E. variegata were confirmed in Taiwan. A highly variation of male morphology with genitalia asymmetry were described. Additionally, the male 8th tergite and sternite were suggested valuable for species identification. Having examined the type series specimen and original description, 13 species distributed in orient were grouping. Except E. minuscula and E. crameri were smaller and identifiable, a mass of ambiguous species included E. variegata, E. maxima, E. layardi, E. japonica, E. pryeri, E. sikkima, E. wallacei, E. javanica, E. wallacei var. bougainvillea, E. formosicola and E. kiushiuana were defined as E. variegata species-complex, and then revised this complex mainly with Taiwanese specimens.
Due to the morphological variety of whole examination involving with those of Taiwan, 8 species were treated as junior synonym of E. variegata, excluding E. japonica, E. javanica and E. kiushiuana that remain undetermined because the types
have not examined. Preliminary result of molecular work also supported this treatment as well, except an individual of China (Yunnan) that more information is needed.

List of Tables..............................................................................................II
List of Figures ...........................................................................................III
Abstract in Chinese………………………………………..……………IV
Abstract in English.....................................................................................V
Introduction.................................................................................................1
Materials & Methods ..................................................................................8
Results.......................................................................................................12
Discussion .................................................................................................32
References.................................................................................................38

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