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Megaherbivores
Megaherbivores represent a specific group of mammals. Elephants, rhinoceroses, hippopotamuses and giraffes are included in this category. Megaherbivores are herbivores separated from all other plant-eating animals by their giant size. As with all mammals, the megaherbivores possess a diaphragm. Despite their huge bodies, the diaphragm in these animals functions exactly as it would in tiny mammals.
Carnivores
Carnivores feed exclusively on flesh. Theses animals include predators such as lions, but also include scavengers like hyenas. Carnivorous mammals possess sharp teeth that cut through meat and a digestive system that breaks down animal cells. However, these animals are opportunistic and will eat fruit and other non-meat items if extremely necessary. The diaphragm in carnivores regulates breathing, as in any other group of mammals, and functions identically in both predator and scavenger.
Marine Mammals
Marine mammals such as dolphins and manatees possesses a diaphragm. In the case of the manatee, though, the diaphragm lies in a less transverse or horizontal plane and is not attached to the sternum. Florida manatees, dolphins and whales are dependant on their diaphragm in order to breathe correctly. This muscle is therefore particularly important for these mammals that spend their entire lives in and under water.
Lagomorphs
Lagomorphs include hares, rabbits and pikas. These are small animals that move quickly and exhibit a very high reproduction rate. Lagomorphs require powerful lungs to allow them to run with speed and a strong diaphragm assists them to escape from predators.
Primates
The primates are a diverse group of mammals, ranging in size from the tiny marmoset that can be held in the hand of a person, to the gorilla which weighs up to 400 pounds. Primates are either tree dwelling, or terrestrial, but despite differences in their lifestyle, all have a diaphragm. Like humans, these primates are able to hiccup, due to the presence of the diaphragm.