Who can give me information on a certain extinct animal order?

Question

I work for Wikipedia and I have a question: I've tried and tried to find information on the extinct mammal order "Macraucheniidae", but have, so far, found very little information. In all honesty, I expect that few will even know what I'm talking about.
But to those of you who do, kindly share your knowledge.

Answer 1

(paleontology) A family of extinct herbivorous mammals in the order Litopterna; members were proportioned much as camels are, and eventually lost the vertebral arterial canal of the cervical vertebrae.

Answer 2

Wow, this is a difficult question! I wish I could answer it though!