FIG. 1 in The Anatomy And Taxonomy Of The Exquisitely Preserved Green River Formation (Early Eocene) Lithornithids (Aves) And The Relationships Of Lithornithidae

FIG. 1. Previous hypotheses of early diverging avians that incorporated Lithornis: A, Houde 1986; B–D, three alternative hypotheses of relationships proposed by Houde, 1988; E, Leonard et al., 2005$; F, Johnston, 2011; G, Livezey and Zusi, 2006; 2007; H, Clarke, 2004; and I, Dyke, 2003. A–E were not based on numerical analyses, whereas the relationships in F–I were calculated in phylogenetic programs. Notes: *taxa collapsed into larger clades; † extinct; lithornithids taxa in bold; $ this position of lithornithids was not found in Dyke, 2003, as cited in Leonard et al., 2005. Abbreviations: "GRP," Pseudocrypturus cercanaxius.