Hello, can you enlighten me more about Micropterus?
There are many genuss' of fish, Micropterus is one of the freshwater fish in the sunfish family. 
When was it first discovered?
Well it's a pretty popular fish.  They're called black bass, and distributed throughout a large area east of the rocky mountains, all the way from Hudson bay in Canada to Mexico.  That makes it hard to say when they were first discovered.
So it's eaten in North America I would say?
Oh yeah they are known to be strong fighters, that means their meat is probably firm, which makes for a very tasty fish.
How much does a kilo of the fish cost?
Micropterus
Micropterus is a genus of freshwater fish in the sunfish family (family Centrarchidae) of order Perciformes. The species of this genus are known as the black bass.
The black bass are sometimes erroneously called black trout, but the name trout more correctly refers to certain members of the salmon family.
The black bass are distributed throughout a large area east of the Rocky Mountains in North America, from the Hudson Bay basin in Canada to northeastern Mexico. Several species, notably the largemouth and smallmouth basses, have
Smallmouth bass
The smallmouth bass ("Micropterus dolomieu") is a species of freshwater fish in the sunfish family (Centrarchidae) of the order Perciformes. It is the type species of its genus. One of the black basses, it is a popular game fish sought by anglers throughout the temperate zones of North America, and has been spread by stocking—as well as illegal introductions—to many cool-water tributaries and lakes in Canada and more so introduced in the United States. The maximum recorded size is approximately