the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Arthropoda (phylum)
Chelicerata (class)
Arachnida (subclass)
Scorpiones (order)
Ischnuridae (family)
Opisthacanthus (genus)
[hide inferior taxa]
Opisthacanthus cayaporum (species)
Opisthacanthus madagascariensis (species)