Dragonfly - Dragonfly

Japanese: ヤンマ(蜻蜓) - ヤンマ

In the narrow sense, it is a general term for insects of the Aeschnidae family of the order Odonata, and in the broad sense, it is used as a common name for large dragonflies including species of the Aeschnidae, Bucconidae, and large Aeschnidae families. Dragonflies of the Aeschnidae family are generally large, with a body length of over 60 mm, and the left and right compound eyes are widely attached to each other on the back. There is no cleft in the middle piece of the lower lip, but there is a pair of small projections in the center. The female has a well-developed ovipositor on the ventral surface of the 8th and 9th abdominal segments. The triangular chambers of the forewings and hindwings are almost identical in shape and are longer toward the tip of the wing.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

狭義にはトンボ目ヤンマ科の昆虫の総称，広義にはさらにオニヤンマ科，ムカシヤンマ科，大型のサナエトンボ科の種を含む大型のトンボ類の俗称として用いられる。ヤンマ科Aeschnidaeのトンボは一般に体長60mm以上と大型で，左右の複眼は背面で広くくっついている。下唇の中片には裂け目はないが，中央に1対の小突起がある。雌の第8,9腹節腹面には産卵管が発達している。前･後翅の三角室はほぼ同形で翅端の方向に長い。

出典　株式会社平凡社世界大百科事典第２版について　情報

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