World's ungulates

The world's extant (living) ungulates belong to 3 orders:

[Proboscideae | Perissodactyla | Cetartiodactyla]

There are about 204 species but the number keeps changing as animals are reclassified, species are forced to extinction and new species are found (4 since 1965).

The arrangement of species, subspecies and other taxonomic levels is in a state of flux. This is particularly applicable to the wild pigs.  New genetic technologies offer new insights into evolutionary relationships.  The sub-specific status of wood and plains bison or Rocky mountain and Manitoba wapiti continues to be debated.

Although many species are now rare and endangered, few have actually been driven to extinction in this century.  Rhinos have experienced the most precipitous decline in recent years. The status of the world’s fauna and flora is maintained in the IUCN Red Data Book.

When the okapi was discovered early in this century, many believed it would be the last large mammal to be added to the list of extant species. After all, people were everywhere and large mammals should be hard to miss.  However, the discovery of the Chacoan peccary (Catagonus) in 1965 raised the possibility of new discoveries.  A "rash" of recent discoveries in southeast Asia followed the military stabilization of the region.  The new additions include Sus bucculentus, the Vietnamese ox and three new muntjacs.

The University of Edinburgh maintains a particularly complete taxonomic hierarchy of living and extinct ungulates.

Taxonomic organization of the world's ungulates

Order	Suborder	Family	Subfamily	Tribe	Genus
Proboscideae		Elephantidae			Elephas Loxodonta
Perissodactyla		Tapiridae			Tapirus
		Rhinocerotidae			Rhinoceros Diceros Ceratotherium
		Equidae			Equus (Equus) Equus (Asinus) Equus (Dolichohippus) Equus (Hippotigris)
Cetartiodactyla	Cetacea				Whales
	Suina	Suidae			Sus
					Babyrusa
					Phacochoerus
					Hylochoerus
					Potamochoerus
		Tayassuidae			Tayassu
					Catagonus
		Hippopotamidae			Hippopotamus
					Choeropsis
	Tylopoda	Camellidae			Camelus
					Llama
					Vicugna
	Tragulina	Tragulidae			Tragulus
					Hyemoschus
	Ruminantia	Giraffidae			Giraffa
					Okapia
		Moschidae			Moschus
		Cervidae	Cervinae		Cervus
					Axis
					Elaphurus
					Dama
			Muntiacinae		Muntiacus
					Megamuntiacus
					Elaphodus
			Hydropotinae		Hydropotes
			Odocoileinae	Odocoilini	Odocoileus
					Ozotocerus
					Blastocerus
					Pudu
				Capreolini	Capreolus
				Alcini	Alces
				Rangiferini	Rangifer
		Antilocapridae			Antilocapra
		Bovidae[1]	Bovinae	Bovini	Bos
					Bibos
					Bison
					Bubalus
					Syncerus
					Pseudonovibos (?)
				Tragelaphini	Tragelaphus
					Taurotragus
				Boselaphini	Boselaphus
					Tetraceros
				Pseudorygini	Pseudoryx
			Caprinae	Caprini	Capra
					Ovis
					Ammotragus
					Hemitragus
					Pseudois
				Rupicaprini	Rupicapra
					Oreamnos
				Ovibovini	Ovibos
					Budorcas
				Naemorhedini	Naemorhedus
					Capricornis
					Myotragus
			Antilopinae	Antilopini	Antilope
					Ammodorcas
					Gazella
					Litocranius
					Procapra
					Antidorcas
					Nanger
Saiga
Neotragini				Neotragus
				Raphicerus
				Oreotragus
				Ourebia
				Madoqua
				Dorcatragus
Pantholopini				Pantholops
Hippotraginae				Hippotragus
				Addax
				Oryx
Reduncinae				Redunca
				Kobus
Alcelaphinae				Alcelaphus
				Damaliscus
	Connochaetes
	Beatragus
	Sigmoceros
Aepycerotinae			Aepyceros
Cephalophinae			Cephalophus
			Sylvicapra
			Philantomba
Peleinae			Pelea

Selected References

The Ultimate Ungulate

BBC Walking with beasts

Biodiversity and Conservation

Electronic Zoo - NetVet

Even-toed Hoofed Mammals

Introduction to Phylogeny

New large mammal species in Vietnam

NCBI Taxonomy Browser (Ruminantia)

Taxonomy of Life - Class Mammalia

The Animal Diversity Web

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[1] Grubb, P. 2001. Review of family-group names of living bovids. J. Mammal. 82: 374-388.