What do you call a mammal without top teeth?

Answer 1

There are no mammals entirely missing their top teeth. Mammals such as ruminants are missing the upper front teeth. These animals include cattle, bison, buffaloes, giraffes, deer, pronghorns, antelopes, sheep, and goats. Camels and llamas are also considered ruminants, but they are not missing their upper front teeth. Some mammals, such as monotremes, are missing teeth altogether.

Answer 2

This is a difficult question to answer, and it depends of what you consider a «mouth».

I will do my best to make reference to some MULTICELLULAR animals only (and will also avoid fungi, which are neither animal nor vegetal life forms).

If you are asking for animals without JAWS, there are plenty of jawless animals, past and present species.

From the late Pre-Cambrian eon we have fossil register of the strange - and still poorly know - Ediacaran biota, which could have an orifice for feeding, or not.

The Cambrian period had (among many other species) the amazing and almost alien-form Anomalocaris,which had underbelly mouthparts that may recall the F-diafragm of a photo camera lens, and was also the apex predator of the Cambrian seas.

Up to the present days, the lamprey, p.e., is a jawless «living fossil», and a delicacy in portuguese cuisine!

However, there seems to have been some strange precambrian animals, like the Dickinsoniafrom the Vendian period, that did have a "digestive-distributive" system, but apparently no mouth at all. Ingestion of food seems to have been made through direct absorption from the skin (osmotrophy).

Today, to the best of my knowledge, the only really mouthless animals belong to the genus Cryptocaryon.

Answer 3

Those are 'edentate' mammals, and include anteaters, armadillos and sloths.

Answer 4

There are some species of animals which are able to eat without even having a mouth. These animals are known as astomatous animals.