Trilobites first appeared in the Cambrian period, around 521 million years ago, and thrived during the Paleozoic era before going extinct at the end of the Permian period, about 252 million years ago. Fish, on the other hand, emerged later in the evolutionary timeline, with the earliest jawless fish appearing around 500 million years ago during the Cambrian period, and more advanced jawed fish appearing in the Devonian period, approximately 419 to 359 million years ago.
Well they appeared in the Precambrian Era, as bacteria. The Paleozoic, as trilobites, brachiopods and fish.
Trilobites first appeared in the Cambrian Period around 521 million years ago, while fish began to emerge around 480 million years ago. This evolutionary timeline suggests that trilobites appeared earlier than fish in Earth's geological history.
The first trilobites appear about the same time in Siberian, Moroccan and North American strata of about 524 million years of age, at the start of series 2 of the Cambrian Period. The first trilobites include fallotaspidoids Profallotaspis, Eofallotaspis, and Fritzaspis, but also include an ellipsocephaloid, Hupetina. For the role of trilobites in biostratigraphy, see this page: http://www.trilobites.info/biostratigraphy.htm
Trilobites appear about 524 million years ago. The "First Appearence Datum" (FAD) of trilobites defines the start of the 2nd Epoch of the Cambrian Period. Trilobites therefore play a very important role in biostratigraphy of the Paleozoic.
Primitive Fish,Trilobites,Orthocones and Horseshoe crabs lived in the silurian
Who?
pterygotus, brontoscorpio,jaekelopterus,cephalaspis, cameracaras,endoceras,stromatopora.
The Trilobites was created in 1984.
In what time period did fish develop and trilobites rule the ocean?
Trilobites did not have jaws, therefore they could not bite.
No, stromatolites are bacterial mats and have been around for at least 2,700,000,000 years. Trilobites only appear in the fossil record about 526,000,000 years ago.
Trilobites are extinct but they were marine animals.