Figure 1

Maximum likelihood tree topology of chelicerate hemocyanin gene family. Tree topology with lnL = -49049.39. Colors in tree correspond to paralog groups. Numbers on nodes indicate bootstrap resampling frequencies. Green terminals indicate novel sequences. Pycnogonida: Endeis spinosa; Xiphosura: Carcinoscorpius rotundicauda, Limulus polyphemus, Tachypleus tridentatus; Opiliones: Metasiro americanus; Scorpiones: Androctonus australis; Centruroides sculpturatus, Pandinus imperator; Uropygi: Mastigoproctus giganteus; Amblypygi: Damon variegatus, Euphrynichus bacillifer; Araneae: Acanthoscurria gomesiana, Cupiennius salei, Eurypelma californicum, Frontinella communis, Leucauge venusta, Liphistius malayanus, Neoscona arabesca, Nephila inaurata.