the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Nematoda (phylum)
Secernentea (class)
Strongylida (order)
[hide inferior taxa]
Ancylostomatidae (family)
Dictyocaulidae (family)
Haemonchidae (family)
Heligmonellidae (family)
Trichostrongylidae (family)