A fossil specimen of the jumping plant-louse genus Cacopsylla (Insecta, Hemiptera, Psylloidea) is described from lacustrine sediments of the middle Pleistocene Miyajima Formation of the Shiobara Group in Tochigi Prefecture, central Japan. It is the first report of a psylloid fossil from Japan. The specimen is a compression fossil of almost whole insect body, and the superb preservation of forewings with delicate veins and membrane tissues strongly suggests that it can be most probably identified as Cacopsylla abieti (Kuwayama), which is a common extant psyllid species in the fossil locality, or possibly its most closely relative of continental east Asia, Cacopsylla pseudosieboldiani (Konovalova and Loginova). The fossil-yielding stratum is a Lagerstätte known for the abundant fossil leaves and other fossil organisms. Extant C. abieti feeds on Siebold’s maple Acer sieboldianum, and remains of various species of Acer including A. sieboldianum are common components of Shiobara fossil biota.

中文翻译：

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来自日本的跳跃性植物虱（昆虫纲，半翅目，兜兰）的第一个化石记录

从日本中部To木县盐原原中部更新世宫岛组的湖相沉积物中描述了跳跃的植物虱属Cacopsylla（昆虫纲，半翅目，小球藻）的化石标本。这是日本的一种类化石化石的首次报道。该标本是几乎整个昆虫体的压缩化石，并且对前肢的精湛保存以及微妙的静脉和膜组织强烈表明，它很可能被鉴定为Cacopsylla abieti（Kuwayama），这是化石中常见的木虱科物种。地区，或者可能是东亚大陆最紧密的近缘种，Cocopsylla pseudosieboldiani（Konovalova和Loginova）。产生化石的地层是Lagerstätte，以丰富的化石叶子和其他化石生物而闻名。现存C. abieti上西博尔德的枫树饲料宏基sieboldianum的不同种类的遗体，以及宏碁包括A. sieboldianum是盐原化石生物群共同组成。