Lineage (NCBI): root » Eukaryota » Opisthokonta » Metazoa » Eumetazoa » Bilateria » Coelomata » Deuterostomia » Chordata » Craniata <chordata> » Vertebrata <Metazoa> » Gnathostomata <vertebrate> » Euteleostomi » Sarcopterygii » Tetrapoda » Amniota » Mammalia » Theria <Mammalia> » Eutheria » Euarchontoglires
Archonta Look for this name in NCBI Wikipedia Animal Diversity Web
http://palaeo-electronica.org/content/fc-1 Benton et al. 2015
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The geologically oldest members of Archonta are Paleocene plesiadapids such as Paromomys farrandi (Clemens and Wilson, 2009). The upper bound of the Torrejonian North American Land Mammal Age (NALMA) correlates to the top of the Danian, 61.6 Ma ± 0.0 Myr = 61.6 Ma (Woodburne, 2004).
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The soft maximum date is based on the divergence of Eutheria from other mammals in the late Jurassic, represented by Juramaia (Luo et al., 2011). This taxon is represented in the Daxigou site of the Tiaojishan Formation, Liaoning Province, Northeastern China, and has been constrained by radiometric dates to derive from deposits of just over 160 Ma in age (Luo et al., 2011). The equivalent marine stage is the Oxfordian (Gradstein et al., 2012), with a lower boundary of 163.5 Ma ± 1.1 Myr, and thus 164.6 Ma is a soft maximum.
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Paromomys is determined phylogenetically as a member of Paromomyidae, which is sister to Plesiadapiformes + Euprimates, and so a part of total-group Primates, nested well within Archonta (Block et al., 2007).
Bloch, J.I., Silcox, M.T., Boyer, D.M., and Sargis, E.J. 2007. New Paleocene skeletons and the relationship of plesiadapiforms to crown-clade primates. Proceedings of the National Academy of Sciences, USA, 104:1159-1164.
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