Abstract The hawker dragonfly Primumaeshna britta gen. et sp. nov., type genus and species of the new family Primumaeshnidae, is described from the Lower Cretaceous Crato Formation in Brazil, corresponding to the oldest record of the clade Aeshnodea. The previously described representatives of the Aeshnoptera from this formation belonged to extinct families or to the Gomphaeschnidae. Otherwise the oldest Aeshnodea were previously only known from the Cenomanian. This new discovery confirms that the diversification of the modern lineages of hawker dragonflies occurred during the Early Cretaceous.

中文翻译：

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来自巴西东北部阿拉里佩盆地下白垩统克拉托组的现代进化枝 Aeshnodea 的最古老代表（Odonata：Anisoptera）

摘要 小贩蜻蜓 Primumaeshna britta gen。等 sp. nov.，新家族 Primumaeshnidae 的类型属和种，描述于巴西的下白垩统克拉托组，对应于 Aeshnodea 进化枝的最古老记录。先前描述的来自该地层的 Aeshnoptera 代表属于已灭绝的科或 Gomphaeschnidae。否则，最古老的 Aeshnodea 以前只从森诺曼尼亚人那里知道。这一新发现证实了小贩蜻蜓现代谱系的多样化发生在早白垩世。