Cryptolithus
Cryptolithus is a genus of extinct 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]
| Cryptolithus Temporal range:  | |
|---|---|
|  | |
| Scientific classification  | |
| Kingdom: | Animalia | 
| Phylum: | Arthropoda | 
| Class: | †Trilobita | 
| Order: | †Asaphida | 
| Family: | †Trinucleidae | 
| Genus: | †Cryptolithus Green, 1832[1] | 
Species
    
Valid species of Cryptolithus include:[5]
- Cryptolithus bellulus (Ulrich, 1879)
- Cryptolithus carimatus
- Cryptolithus fittsi (Ulrich & Whittington)
- Cryptolithus goldfussi (Barrande)
- Cryptolithus inopinatus (Whittard)
- Cryptolithus intertetus (Whittard)
- Cryptolithus lorerainensis (Ruedemann)
- Cryptolithus lorettensis (Foerste, 1924)
- Cryptolithus ornatus (Sternberg)
- Cryptolithus portlockii 
- Cryptolithus portlockii girvanensis
 
- Cryptolithus quadrillatus
- Cryptolithus recurvus (Ulrich, 1919)
- Cryptolithus tessellatus (Green, 1832)
- Cryptolithus ultimus (Barrande)
References
    
-  Green, Jacob (1832). "A Monograph of the Trilobites of North America: With Coloured Models of the Species". 1. Joseph Brano: 72–78. doi:10.5962/bhl.title.66801. {{cite journal}}: Cite journal requires|journal=(help)
- "Cryptolithus". Encyclopædia Britannica. 6 August 2019. Retrieved 7 December 2020.
- Stigall, A.L. "Cryptolithus". Atlas of Ordovician Life.
- "†Cryptolithus Green 1832 (trilobite)". fossilworks. Retrieved 17 December 2021.
- Museum of Comparative Zoology
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