Cryptolithus
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| Cryptolithus Temporal range: | |
|---|---|
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| Cryptolithus fossil, National Museum of Natural History | |
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| Reconstruction of the ventral side of Cryptolithus tessellatus | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | †Trilobita |
| Order: | †Asaphida |
| Family: | †Trinucleidae |
| Genus: | †Cryptolithus Green, 1832[1] |
Cryptolithus is a genus of extinct epifaunal, suspension-feeding, trinucleid trilobites that lived during the Ordovician period.[2] They were mostly blind.[3] They are found in the United States, Canada, Venezuela, the United Kingdom, France, the Czech Republic, Morocco and Turkey.[4]