description Agnostus Overview
Agnostus is a genus of small Cambrian agnostid trilobites. Members typically had a compact body with head and tail shields that were similar in size and outline, and many species were blind or had highly reduced eyes. Agnostus fossils occur in Cambrian marine rocks on several continents, and some species are important biostratigraphic index fossils because their ranges can help correlate rock layers of similar age.
help Agnostus FAQ
What kind of fossil is Agnostus?
Agnostus is a genus of small Cambrian agnostid trilobites. Its fossils occur in Cambrian marine rocks on several continents or regions.
How can Agnostus be recognized?
Its head and tail shields are typically similar in size and outline, giving the body a compact appearance. Many species also had blind or highly reduced eyes.
When did Agnostus live?
Agnostus lived during the Cambrian Period, when trilobites were common in marine environments. The supplied catalog description does not give a narrower species-specific date.
Were Agnostus trilobites able to see?
Many Agnostus species were blind or had highly reduced eyes. That feature distinguishes them from trilobites with more developed visual organs, although eye structure varied among species.
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