琥珀的奇幻世界

彈尾目的昆蟲又稱跳蟲是極原始的昆蟲，最古老的跳蟲化石發現於四億年前的泥盆紀(Devonian)時期；它也是地表數量最多的昆蟲，密度最高時，每平方公尺可多達十萬隻以上。跳蟲無翅，主要特徵是腹尾部的彈尾器，身形很小，在琥珀裡必須仔細尋找才能發現它的蹤跡；雖然它們數量很多，但要發現它們成群出現在琥珀裡，極不容易。

Collembola are also called springtails, which are the most primitive insects. The oldest springtail fossil was found in the Devonian 400 million years ago. They are also the largest group of insects on the surface. At the highest density, there are more than 100 thousand per square meters. Springtails have no wings with the main feature of leaping organs on the abodominal segments. They are tiny, so scrutiny is required to find their traces in amber. Despite their big number, it is very hard to discover their group appearance in amber.