ol ot l .< ref ▁name = val ade z > Val ade z , ▁R ., ▁Rodríguez , ▁B ., ▁Man zan illa , ▁L . ▁& ▁Te j eda , ▁S . ▁( 2 0 0 6 ), ▁Dog - w olf ▁hy brid ▁bi ot ype ▁reconst ruction ▁from ▁the ▁arch ae ological ▁city ▁of ▁Te ot ih u ac an ▁in ▁pre his pan ic ▁central ▁Mexico ▁, ▁in ▁D ogs ▁and ▁People ▁in ▁Social , ▁Working , ▁Econom ic ▁or ▁Symbol ic ▁Inter action , ▁ed . ▁L . ▁M . ▁S ny der ▁& ▁E . ▁A . ▁Moore , ▁pp . ▁ 1 2 1 - 1 3 1 , ▁Oxford , ▁England : ▁Ox bow ▁Books ▁( Pro ceed ings ▁of ▁the ▁ 9 th ▁I CA Z ▁Conference , ▁Dur ham , ▁England , ▁ 2 0 0 2 .</ ref > ▁The ▁earliest ▁written ▁record ▁of ▁the ▁Mexican ▁w olf ▁comes ▁from ▁Francisco ▁J avier ▁C lav ij ero ' s ▁Historia ▁de ▁México ▁in ▁ 1 7 8 0 , ▁where ▁it ▁is ▁referred ▁to ▁as ▁Cu etz lach co j ot l , ▁and ▁is ▁described ▁as ▁being ▁of ▁the ▁same ▁species ▁as ▁the ▁co y ote , ▁but ▁with ▁a ▁more ▁w olf - like ▁p elt ▁and ▁a ▁th icker ▁neck . ▁ ▁Dec line ▁There ▁was ▁a ▁rapid ▁reduction ▁of ▁Mexican ▁w olf ▁populations ▁in ▁the ▁South western ▁United ▁States ▁from ▁ 1 9 1 5 - 1