Michael D. Coe and Richard A. Diehl report on the discovery of a dog bone at San Lorenzo Tenochtitlán, dating to the time of the Olmecs.
Michael D. Coe and Richard A. Diehl, In the Land of the Olmec, 2 vols. (Austin, Texas: University of Texas Press, 1980), 1:226
Dogbone (fig. 212)
Description: A cylindrical Namo probably used with metates which were narrower than the length of the mano.
Rolled back and forth to grind, probably one hand.
Dimensions: 6.3 centimeters diameter knob, 4.5 centimeters center; 6.3 centimeters diameter knob, 5.4 centimeters center.
Material: Gray granite [I], white granite with black and green inclusions [1].
Phase assignment: Villa Alta.