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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?
the Mesoic period
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.
What species went extinct in the permian extinction?
All of the Trilobites, Pelycosaurs, Gorgonopsians, Dimetrodon, Edaphosaurus, Pariesaurs, most of the ammonites, amphibians, and jawless fish, plus many more.
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?
Are Trilobites land animals or water animals?
Trilobites are extinct but they were marine animals.
