Ichthyostegalia

例句：

1. 1. The fisherman found a rare species of ichthyostegites in the river.
   渔民在河里发现了一种罕见的鱼头骨。
2. 2. The ichthyostegites were used in ancient Egypt to make jewelry.
   鱼头骨在古埃及被用来制作珠宝。
3. 3. The ichthyostegites are considered a symbol of good luck in some cultures.
   在某些文化中，鱼头骨被视为好运的象征。