1) Animal order 2) Armadillos 3) Suborder xenarthra 
Xenarthrans share several characteristics not present in other placental mammals. The name Xenarthra, which means `strange joints`, was chosen because their vertebral joints have extra articulations and are unlike those of any other mammals — a character referred to as `xenarthry` — and ischiosacral fusion. The males have internal testicle...
An order of new world mammals characterised by the absence of incisors and canines from among their teeth, and comprising the armadillos, the sloths, and the anteaters. The order is distinguished from all others by what are known as xenarthrous vertebrae (xenos, strange; arthron, joint): there are secondary, and sometimes even more, articulations b...
[n] - armadillos
suborder Xenarthra noun armadillos; American anteaters; sloths