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Yanma seems to be based on a dragonfly, possibly the banded darter. Because of its size and weight, it might have been inspired by prehistoric ancestors to modern dragonflies and damselflies in the Meganeura genus, commonly referred to as "griffinflies". This is further supported by its evolution, Yanmega, which is much more closely linked to ancient dragonflies, and whose offspring did not have a larval stage, instead hatching directly into a smaller version of their adult phase, as Yanma is a fully formed dragonfly.