For many organisms, sex is irrelevant there are no males and no females. There are problems defining a species for several reasons. ![]() The second lowest level, the species, is supposed to be an interbreeding unit in nature that produces viable offspring. Carolus Linnaeus was the first to provide a major classification of living animals about 250 years ago, starting with the kingdom and ending with the variety (table A1.1). The groups were based generally on the way the animals looked or by their morphology. One type of gomphothere has two broad lower tusks that are shovel-shaped.Įver since the beginning of the science of biology, scientists have attempted to group animals into categories. It has four tusks, two small ones extending out from the upper jaw, typical of nearly all Proboscidea, and two that spread downward from the lower jaw. 2 The gomphothere is an interesting elephant type. They mostly vary on the shape of the tusks, the details of the teeth, and the number and location of their tusks. Proboscidea classificationĪll of the animals in the order Proboscidea in general look like types of elephants. However, it is believed the mammoths and mastodons in North America lived in different habitats - mammoths preferring open grassland and mastodons favoring forested areas. 1 A particular type of mastodon, Mammut americanum, accompanied the mammoth into North America during the Ice Age. Many other types of elephants are found as fossils, including mastodons and gomphotheres. There are only two living representatives of Proboscidea, the African and Asian elephants. ![]() The order was named from the word proboscis, meaning “long, flexible snout” or trunk. Mammoths are part of the order Proboscidea, or elephant order.
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