Fig. 1

Comparison of Gene Numbers of far in 58 nematodes. The range of definitive hosts and intermediate hosts of the nematodes is shown. Taxonomic classification of nematodes was retrieved from the Taxonomy database. The topology of Nematoda phylogeny was inferred as described [26]. Genus names are shown in bold italics and the species numbers are shown in parentheses. The number of far genes is shown in square brackets. Red branch represents the species with expanded far genes. Trichuris species include T. muris (Tmu), T. suis (Tsu), and T. trichiura (Ttr); Steinernema species include S. carpocapsae (Sca), S. feltiae (Sfe), S. glaseri (Sgl), S. monticolum (Smo), and S. scapterisci (Ssc); Strongyloides species include S. papillosus (Spa), S. ratti (Sra), S. stercoralis (Sst), and S. venezuelensis (Sve); Meloidogyne species include M. hapla (Mha) and M. incognita (Min); Globodera species includes G. pallida (Gpa) and G. rostochiensis (Gro); Ascaris species include A. lumbricoides (Alu) and A. suum (Asu); Onchocerca species include O. flexuosa (Ofl), O. ochengi (Ooc), O. volvulus (Ovo); Lymphatic filaria include Wuchereria bancrofti (Wba), Brugia malayi (Bma), and Brugia pahangi (Bpa); Pristionchus species include P. exspectatus (Pex) and P. pacificus (Ppa); Ancylostoma include A. caninum (Aca), A. ceylanicum (Ace), and A. duodenale (Adu); Angiostrongylus include A. costaricensis (Aco) and A. cantonensis (Acant); Haemonchus include H. contortus (Hco) and H. placei (Hpl)