Correction.

Abstract

EVOLUTION, GEOLOGY Correction for “Late Jurassic salamandroid from western Liaoning, China,” by Ke-Qin Gao and Neil H. Shubin, which appeared in issue 15, April 10, 2012, of Proc Natl Acad Sci USA (109:5767– 5772; first published March 12, 2012; 10.1073/pnas.1009828109). The authors note that on page 5772, left column, first full paragraph, lines 17–20 to lines 1–2 of the adjacent right column, “This evidence, in keeping with our previous report of an early cryptobranchid from Inner Mongolia (9), rejects the purported timing of 140Ma for this cladogenetic event (16), but supports a more recent study based on complete mitochondrial genomes for a Middle Jurassic divergence of the Salamandroidea from Cryptobranchoidea (8)” should instead appear as “This evidence, in keeping with our previous report of an early cryptobranchid from Inner Mongolia (9), supports molecular calibrations that imply Middle Jurassic divergence of the Salamandroidea from Cryptobranchoidea (8, 16).”