malacostracan

例句：

1. 1.The Malacostrakan is a rare species of sea turtle.
   Malacostrakan是一种罕见的海龟种类。
2. 2.The Malacostrakan has been extinct for over 100 years.
   Malacostrakan已经灭绝超过100年了。
3. 3. The Malacostrakan is known for its unique shell patterns.
   Malacostrakan以其独特的壳图案而闻名。