Cryptolithus

Not to be confused with Cryptolithodes.

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]

Cryptolithus Temporal range: Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
Cryptolithus fossil, National Museum of Natural History
Reconstruction of the ventral side of Cryptolithus tessellatus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	†Artiopoda
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)