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When did the first mollusk appear?
Well they appeared in the Precambrian Era, as bacteria. The Paleozoic, as trilobites, brachiopods and fish.
Time when trilobites and fish arrived?
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.
When did trilobites first appear in fossil record?
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
What is the approximate age of the oldest trilobite?
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.
What tipe of animals during Silurian?
Primitive Fish,Trilobites,Orthocones and Horseshoe crabs lived in the silurian
Who out of fish amphibians or reptile have three classes that is jawless cartilaginous and bony?
Who?
What were the first animals to adapt to life on land during the silurian period?
pterygotus, brontoscorpio,jaekelopterus,cephalaspis, cameracaras,endoceras,stromatopora.
When was The Trilobites created?
The Trilobites was created in 1984.
Did trilobites bite?
Trilobites did not have jaws, therefore they could not bite.
Is synthetic interferon used in the treatment of Hepatitis C and in some cancers?
In what time period did fish develop and trilobites rule the ocean?
Did trilobites come before stromatolite?
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.
Are Trilobites land animals or water animals?
Trilobites are extinct but they were marine animals.
