Lycophantis elongata Moriuti, 1963

Lycophantis elongata是巢蛾科(Yponomeutidae)的成員，目前僅知分布於印度阿薩姆與臺灣。本種的頭部與前、中胸背方為白色，後胸為褐色，前翅翅形狹長，靠前緣一半為黑褐色，白色帶由翅基沿後緣延伸至近翅頂端，後翅為灰褐色底，無其他翅紋；腹部背方為灰褐色。Lycophantis在全世界已紀錄6種，從印度沿中南半島一直分布到日本(Sohn & Park, 2010)，臺灣則紀錄了其中2種，分別是L. elongata與L. chalcoleuca，後者為本屬之模式種。本屬翅紋相似，根據Sohn & Park (2010)中所提供的檢索表，臺灣產兩種可藉由以下翅紋特徵加以區別：L. elongata前翅後緣的白色帶由翅基一直延伸到近翅頂，L. chalcoleuca則僅至約後緣一半處。惟比對L. chalcoleuca的選模標本照後，筆者認為翅紋的穩定度仍有待進一步商榷。在比較Moriuti (1963)和Sohn & Park (2010)的研究後，卻發現2篇文章對於L. elongata與L. chalcoleuca的雌性生殖器，描述完全不同。前者認為L. elongata無交配囊片(signum)而L. chalcoleuca有之；後者則根據Moriuti(1977)的研究持相反意見。由於筆者目前尚未能檢視到Moriuti (1977)的研究，無法確定Moriuti對1963年交配囊片的描述與手繪圖部分是否有進一步的看法，故先採用Sohn & Park (2010)的觀點，將圖中標本鑑定為L. elongata。照片中的標本採自扇平，2011年3月。

A Brief Introduction

Lycophantis is a yponomeutid genus distributed in Asia tropics or subtropics, with 6 described species sharing similar wing pattern until now. L. elongata and L. chalcoleuca were reported to distributed in Taiwan by Moriuti (1963). These two species could be distinguished from the presence of signum in the latter but absence in the former. However, in Sohn & Park's (2010) study, the opposite opinion was held based on the study of  Moriuti (1963):  signum present in L. elongata but not L. chalcoleuca. In the present article, Sohn & Park's (2010) opinion is taken and specimen in this photo is identified to be L. elongata after dissection.

References
Moriuti S., 1963. Studies on the Yponomeutidae (VI) genus Lycophantis Meyrick (Lepidoptera: Yponomeutidae). Japanese Journal of Entomology (Kontyû) 31(4): 261-266.
Moriuti S., 1977. Fauna Japonica, Ypomeutidae s. lat. (Insecta, Lepidoptera). Tokyo, 327 pp.(本文獻目前尚未檢視)
Sohn JC & Park KT, 2010. Three new species of Lycophantis Meyrick (Lepidoptera: Yponomeutidae) from Vietnam, with a key to the world species. Oriental Insects 44(1): 225-233.