Pyxis

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Cladus: Archelosauria
Division: Pan-Testudines
Division: Testudinata
Ordo: Testudines
Subordo: Cryptodira
Superfamilia: Testudinoidea

Familia: Testudinidae
Genus: Pyxis

Species: P. arachnoides - P. planicauda
Name
Pyxis　Bell, 1827

Pyxis is a genus of tortoise in the family Testudinidae. It contains the following species:

Flat-backed spider tortoise (Pyxis planicauda)
Spider tortoise (Pyxis arachnoides)

References

Turtles of the World: Annotated Checklist of Taxonomy and Synonymy, December 2009 update.