toad (see Karttunen, Molina, and attestations); some attestations translate this as "frog," but there is another word for frog, calatl
The Huiquipedia gives the genus as Bufonidae. It also provides a photograph.
motlatlalia tlaltzotzontli ipan cacate tamaçolme vnteme = they were seated on a wall; on it were two frogs
Yn iquac ye omiqui nima ytec quicalaquique pipa yhuan cocohua tamaçolime caxtil mizto çaço nepapa yolcatl. = Una vez que murió, luego lo metieron dentro de una pipa junto con culebras, sapos, gallo, gato y cualquier otra variedad de animal. (Tlaxcala, 1662–1692)
yhuan mictlan mapiluhuaya quitohuaya quitenehuaya cohuatl tamaçoli tlalticapac moquetzaya temachtiaya = Y señalaba con el dedo al infierno y decía: culebra, sapo. Parado sobre la tierra, enseñaba. (Tlaxcala, 1662–1692)