comment on this calibration
Uria
Lineage (NCBI):
root
» Eukaryota
» Opisthokonta
» Metazoa
» Eumetazoa
» Bilateria
» Coelomata
» Deuterostomia
» Chordata
» Craniata <chordata>
» Vertebrata <Metazoa>
» Gnathostomata <vertebrate>
» Euteleostomi
» Sarcopterygii
» Tetrapoda
» Amniota
» Sauropsida
» Sauria
» Archosauria
» Coelurosauria
» Aves
» Neognathae
» Charadriiformes
» Alcidae
» Uria
| node name Uria Look for this name in NCBI Wikipedia Animal Diversity Web | ||
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recommended citations http://palaeo-electronica.org/content/fc-4 Smith, 2015 |
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node minimum age 2.6 Ma The transgressive marine sequences that outcrop at Tolstoi Point, and from which the Uria remains were recovered, are interpreted as equivalent to the Bigbendian and Colvillian stages and the absolute ages have been established at 2.6-3.0 Ma on the basis of stratigraphic and biostratigraphic correlations (Brigham-Grette and Carter 1992; Olson, in press). | ||
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node maximum age 0 Ma none specified. | ||
| primary fossil used to date this node | ||
CASG 71892 | ||
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phylogenetic justification
Referred to Uria lomvia based upon apomorphies of the coracoid and humerus (Olson, in press). Although the specimen has not been included in a phylogenetic analysis, it would likely be an operational equivalent of specimens of Uria lomvia scored by Smith (2011a) and the referral of that specimen to Uria lomvia has not been questioned. |
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phylogenetic reference(s)
Smith, N. A. and J. A. Clarke. 2011. An alphataxonomic revision of extinct and extant razorbills (Aves, Alcidae): a combined morphometric and phylogenetic approach. Ornithological Monographs 72:1-61.
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| tree image (click image for full size) | ||
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Figure 2 from Smith (2015).
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