Final answer:
The first Homo erectus specimen discovered was known as "Java Man," found in Indonesia, marking an important step in human evolutionary history with its more advanced features and behaviors.
Step-by-step explanation:
The very first specimen of Homo erectus ever found was known as "Java Man" and was discovered in the early 1890s on the island of Java in Indonesia. Homo erectus is a significant figure in the story of human evolution, having appeared approximately 1.8 million years ago and believed to be one of the first hominins to migrate out of Africa. This pivotal species was more advanced than its predecessor, Homo habilis, with features more similar to modern humans, including increased brain size and the use of fire and tools.