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Asaphidae; Temporal range: Upper Cambrian–Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
	Asaphus latus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	†Artiopoda
Class:	†Trilobita
Order:	†Asaphida
Superfamily:	†Asaphoidea
Family:	†Asaphidae; Burmeister, 1843
Genera
	See text

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.^{[citation needed]}

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. ^[1]

Asaphids first appeared in the Upper Cambrian,^[2] and were already fairly common during this time, 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.^[1]

Subdivisions and genera

More than 20 subfamilies have been named within the Asaphidae, but very few of the subfamily names are in regular use.^[2] Over 150 genera of asaphids have been named.^[2]

Asaphidae contains the following genera:^[3]

References

1 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.
1 2 3 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.
↑ 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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[HarperServais-1] 1 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.

[:0-2] 1 2 3 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.

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

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Distribution

Subdivisions and genera

References

Links