noun
Epiophlebia superstes; living-fossil dragonfly
A species of dragonfly endemic to Japan, considered a living fossil. Often written in katakana as ムカシトンボ.
ムカシトンボは日本だけに生息する生きた化石です。
The Epiophlebia superstes is a living fossil that lives only in Japan.
山間の清流でムカシトンボの幼虫を見つけた。
I found a larva of Epiophlebia superstes in a clear mountain stream.
The name ムカシトンボ (昔蜻蛉) literally means 'ancient dragonfly', reflecting its status as a living fossil.