Protrusion like the horn of Nannophya pygmaea

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Nannophya pygmaea is the smallest dragonfly in Japan. However, the egg is not so small. There is a small protrusion like the horn in the head of this dragonfly.




1:Egg   2:Prolarva begins to appear from the egg  3:Prolarva    4,6,7,8,9:First instar larva appears from the prolarva (Protrusion like the horn appears in this time)  10,11:First instar larva  5:Protrusion like the horn of the head (The size of 4 times of other images)