Figure 34. Interrelationships among basal actinopterygians including the new data from Stegotrachelus finlayi. A branch and bound search reveals a in Devonian actinopterygian phylogeny and evolution based on a redescription of Stegotrachelus finlayi

Figure 34. Interrelationships among basal actinopterygians including the new data from Stegotrachelus finlayi. A branch and bound search reveals a single most parsimonious tree (length = 145; consistency index = 0.57; retention index = 0.75; rescaled consistency index = 0.43). Values immediately below the nodes are Bremer decay indices. Values above Bremer decay indices represent bootstrap support values based on a heuristic search algorithm with 10 000 pseudoreplicates and ten addition-sequence replicates. Bootstrap values in excess of 40% are included. Letters at nodes are keyed to the apomorphy list provided in Appendix S3. Line drawings adapted from: Onychodus jandemarrai, Andrews et al. (2006), with body adapted from Strunius, Jessen (1966); Miguashaia bureaui, Cloutier (1996); Uranolophus wyomingensis, Long (1993); Osteolepis macrolepidotus, Jarvik (1948); Cheirolepis canadensis, Arratia & Cloutier (1996); Cheirolepis schultzei, Arratia & Cloutier (2004); Cheirolepis tralli, Pearson & Westoll (1979); Osorioichthys marginis, Taverne (1997); Donnrosenia schaefferi, Long et al. (2008); Tegeolepis clarki, Friedman & Blom (2006); Howqualepis rostridens, Long (1988); 'Mimia' toombsi, Gardiner (1984); Krasnoyarichthys jesseni, Prokofiev (2002); S. finlayi is original; Moythomasia dugaringa, Gardiner (1984) and Brian Choo (pers. comm., 2008); Moythomasia nitida, Jessen (1968); Limnomis delaneyi, Daeschler (2000); Cuneognathus gardineri and Kentuckia hlavini, Friedman & Blom (2006); Melanecta anneae and Woodichthys bearsdeni, Coates (1998); Wendyichthys dicksoni, Lund & Poplin (1997).