Euphractinae

Euphractinae is an armadillo subfamily in the family Chlamyphoridae.

Euphractinae Temporal range: Middle Eocene (Casamayoran)-Recent ~50–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Chaetophractus vellerosus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Cingulata
Family:	Chlamyphoridae
Subfamily:	Euphractinae Winge 1923
Genera
Chaetophractus Fitzinger 1871 Euphractus Wagler 1830 Zaedyus Ameghino 1889

Euphractinae are known for having a well developed osteoderm that has large cavities filled with adipose tissue, and more hair follicles with well developed sebaceous glands in comparison to the Dasypodidae sub family. These are believed to be evolutionary adaptations in the Euphractinae to support it in the cooler climate that it usually lives in.^[1]

Taxonomy

It contains the following genera:^[2]

• Chaetophractus, hairy armadillos
• Euphractus, six-banded armadillos
• Zaedyus, pichis

Extinct genera include:^[3]

• Paleuphractus
• Parutaetus
• Doellotatus
• Proeuphractus
• Macroeuphractus

Phylogeny

A mitochondrial DNA investigation has concluded that Euphractinae is the sister group of a clade consisting of Chlamyphorinae (fairy armadillos) and Tolypeutinae (giant, three-banded and naked-tailed armadillos)^[4] along with extinct glyptodonts,^[5] as shown below.

Cladogram[5][6][7]

Cingulata Dasypodidae Chlamyphoridae Euphractinae Euphractus sexcinctus Zaedyus pichiy Chaetophractus villosus Chaetophractus nationi C. vellerosus †Glyptodontinae (Doedicurus) Chlamyphorinae Chlamyphorus truncatus Calyptophractus retusus Tolypeutinae Priodontes maximus Tolypeutes T. tricinctus T. matacus Cabassous C. tatouay C. chacoensis C. centralis C. unicinctus