Extinct eel shark (†Thrinacodus ferox)

Superdomain: Neomura

Domain: Eukaryota

(unranked): Unikonta

(unranked): Obazoa

(unranked): Opisthokonta

(unranked) Holozoa

(unranked) Filozoa

Kingdom: Animalia

Subkingdom: Eumetazoa

Clade: ParaHoxozoa

Clade: Bilateria

Clade: Nephrozoa

Superphylum: Deuterostomia

Phylum: Chordata

Clade: Olfactores

Subphylum: Vertebrata

Infraphylum: Gnathostomata

Clade: Eugnathostomata

Class: Chondrichthyes

Subclass: Elasmobranchii

Clade: †Phoebodontiformes

Order: †Unranked

Family: †Unranked

Genus: †Thrinacodus

Species: †T. ferox

Done