the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Arthropoda (phylum)
Crustacea (subphylum)
Malacostraca (subclass)
Eucarida (infraclass)
Decapoda (order)
Pleocyemata (suborder)
Astacidea (superfamily)
Astacura (alias)
crayfishes (common name)
[hide inferior taxa]
Astacidae (family)
Cambarus ludovicianus (species)
Parastacidae (family)
Procumbarus clarkii (species)