Evolution and Systematics
Evolution
Fossils assignable to the order Asterales are known from the Oligocene, circa 29 million years ago (mya). Wikström et al. suggest an age of 96 to 93 mya for the crown group, where Bremer et al has advanced the estimate of 90 to 82 mya for the crown group; Janssens et al. date stem group Asterales to 104±12.1 mya and the crown group to 94±11.2 mya.
- * P.F.Stevens. 2008. Angiosperm Phylogeny Website. Version 9. http://www.mobot.org/mobot/research/apweb/welcome.html
Supplier: C. Michael Hogan
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Molecular Biology and Genetics
Barcode
Locations of barcode samples
Collection Sites: world map showing specimen collection locations for Asterales 
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Statistics of barcoding coverage
Barcode of Life Data Systems (BOLD) Stats
| Specimen Records: | 2,010 |
| Specimens with Sequences: | 2,746 |
| Specimens with Barcodes: | 2,161 |
| Public Records: | 437 |
| Species: | 672 |
| Species With Barcodes: | 500 |
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Barcode data
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