FIG. 1 in The origin(s) of extant amphibians: a review with emphasis on the "lepospondyl hypothesis"

FIG. 1. — Hypotheses on the origin of Lissamphibia in the recent literature (modified from Marjanović & Laurin 2008b: fig. 1). Extant taxa in bold; extant amphibians underlain in yellow (Œ) if monophyletic (Lissamphibia) or pastel orange () if polyphyletic, temnospondyls underlain in violet (Ž), lepospondyls in cyan (), the amniote-diadectomorph clade in green (): A, B, Temnospondyl hypothesis (TH) as of the late 1980s and early 1990s; B, simplified from Trueb & Cloutier (1991); C, D, TH, simplified from Ruta & Coates (2007); E, Lepospondyl hypothesis (LH), simplified from Vallin & Laurin (2004); F, Polyphyly hypothesis (PH), simplified from Carroll & Holmes (1980) through Carroll et al. (2004); G, PH simplified from Anderson et al. (2008b); the name Amphibia does not apply to any clade under this topology; H, a version of the PH, simplified from Carroll (2007: fig. 77), where extant amphibians and "lepospondyls" are nested inside the "temnospondyls"; "Anthracosauroidea" is an OTU that includes Embolomeri, Gephyrostegidae and Seymouriamorpha; "basal temnospondyls" is an OTU composed of Dendrerpeton and Balanerpeton; the "Microsauria" OTU consists of all "microsaurs" except Rhynchonkos; I, skull roof of the temnospondyl Iberospondylus schultzei, modified from Laurin & Soler-Gijón (2001). Scale bar: 1 cm. The authors of all taxon names are listed in Appendix 11.