Encrinuridae

Encrinuridae Temporal range: Middle Ordovician–Early Devonian PreꞒ Ꞓ O S D C P T J K Pg N
Fossil of Encrinurus egani from the Racine Dolomite
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Phacopida
Family:	†Encrinuridae Angelin, 1854

Encrinuridae is a family of trilobite within the order Phacopida that lived in what would be Africa, Asia, Australia, Europe, North America, and South America from the middle Ordovician to the early Devonian from 479 to 412.3 million years ago, existing for approximately 66.7 million years.[1]

Taxonomy

Encrinuridae was named by Angelin (1854). It was assigned to Phacopida by Gregory Edgecombe (1994).[2] It contains the following genera:[3]

• †Aegrotocatellus
• †Alwynulus
• †Atractocybeloides
• †Atractopyge
• †Avalanchurus
• †Balizoma
• †Batocara
• †Bevanopsis
• †Billevittia
• †Brianurus
• †Celtencrinurus
• †Coronaspis
• †Coronocephalus
• †Cromus
• †Curriella
• †Cybele
• †Cybeloides
• †Cybelurus
• †Dayongia
• †Deacybele
• †Dindymene
• †Distyrax
• †Dnestrovites
• †Elsarella
• †Encrinuroides
• †Encrinurus
• †Eodindymene
• †Erratencrinurus
• †Fragiscutum
• †Frammia
• †Frencrinuroides
• †Johntempleia
• †Kailia
• †Koksorenus
• †Langgonia
• †Lasaguaditas
• †Libertella
• †Lyrapyge
• †Mackenziurus
• †Mitchellaspis
• †Nucleurus
• †Oedicybele
• †Paracybeloides
• †Paraencrinurus
• †Parakailia
• †Perirehaedulus
• †Perryus
• †Physemataspis
• †Plasiaspis
• †Prophysemataspis
• †Prostrix
• †Rielaspis
• †Rongxiella
• †Sinocybele
• †Staurocephalus
• †Stiktocybele
• †Struszia
• †Tewonia
• †Walencrinuroides
• †Wallacia

Fossil distribution

Fossils were found in strata dating from the Arenig to Lochkovian ages. Locations were varied and stretched from Florentine Valley, Tasmania to Xinjiang Province, China to Will County, Illinois.

Sources

1. PaleoBiology Database: Encrinuridae, basic info
2. Edgecombe, Gregory D. (1994). "New Lower Silurian (Llandovery) encrinurine trilobites from the Mackenzie Mountains, Canada". Journal of Paleontology. 68 (4): 824–837. Bibcode:1994JPal...68..824E. doi:10.1017/S0022336000026263. JSTOR 1306150. S2CID 132373442.
3. S. M. Gon III. "Order Phacopida". Retrieved November 21, 2010.

• Fossils (Smithsonian Handbooks) by David Ward
• Trilobites by Riccardo Levi-Setti
• Invertebrate Palaeontology and Evolution by E.N.K. Clarkson
• Trilobites: Common Trilobites of North America (A NatureGuide book) by Jasper Burns

External links

• Encrinurus in the Paleobiology Database