Asaphidae

Asaphidae; Temporal range: Upper Cambrian–Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
	Asaphus latus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Asaphida
Superfamily:	†Asaphoidea
Family:	†Asaphidae; Burmeister, 1843
Subfamilies
	Asaphinae; Isotelinae; Niobinae; Ogygiocarellinae;

Asaphidae is a family of asaphid trilobites. Although the first genera originate in Upper Cambrian marine strata, the family becomes the most widely distributed and most species-rich trilobite family during the Ordovician. 754 species assigned to 146 genera are included in Asaphidae.

Distribution

Most Asaphinae are characteristic of Baltica. Isotelinae genera are concentrated in Laurentia. The genera of Nobiliasaphinae are distributed in tropical Gondwana and South China. The genera of Ogygiocaridinae occur in Avalonia, Gondwana and Baltica. Asaphidae asaphids were already fairly common during the Upper-Cambrian, when 14 genera are known from Australia, North- and South-China. The last members of the family died-out at the end of the Ordovician.^[2]

Assigned genera

Asaphidae contains the following genera:^[3]

References

^ Bell, Mark A.; Braddy, Simon J. (2011). "Cope's rule in the Ordovician trilobite family Asaphidae (order Asaphida): patterns across multiple most parsimonious trees". Historical Biology: 1–8. doi:10.1080/08912963.2011.616201. S2CID 84438297.
^ J.M. Adrian (2014). "20. A synopsis of Ordovician trilobite distribution and diversity". In D.A.T. Harper; T. Servais (eds.). Early Palaeozoic Biogeography and Palaeogeography. Memoirs of the Geological Society of London. Vol. 38. Geological Society of London. p. 490. ISBN 978-1862393738.
^ S. M. Gon III. "Order Asaphida". Archived from the original on 6 January 2011. Retrieved December 7, 2010.

Links

"Drawings of many asaphids". Problems of evolution. Archived from the original on January 3, 2014.

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[1] Bell, Mark A.; Braddy, Simon J. (2011). "Cope's rule in the Ordovician trilobite family Asaphidae (order Asaphida): patterns across multiple most parsimonious trees". Historical Biology: 1–8. doi:10.1080/08912963.2011.616201. S2CID 84438297.

[HarperServais-2] J.M. Adrian (2014). "20. A synopsis of Ordovician trilobite distribution and diversity". In D.A.T. Harper; T. Servais (eds.). Early Palaeozoic Biogeography and Palaeogeography. Memoirs of the Geological Society of London. Vol. 38. Geological Society of London. p. 490. ISBN 978-1862393738.

[3] S. M. Gon III. "Order Asaphida". Archived from the original on 6 January 2011. Retrieved December 7, 2010.

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