Homo (genus)

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Homo

Scientific classification

Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Primates
Family:	Hominidae
Subfamily:	Homininae
Tribe:	Hominini
Subtribe:	Hominina
Genus:	Homo Linnaeus, 1758

Species

Homo sapiens
See text for extinct species.

Homo is the genus that includes modern humans and their close relatives. The genus is estimated to be between 1.5 and 2.5 million years old. All species except Homo sapiens (modern humans) are extinct. Homo neanderthalensis, traditionally considered the last surviving relative, died out 30,000 years ago while recent evidence suggests that Homo floresiensis lived as recently as 12,000 years ago.

A minority of zoologists consider that the two species of chimpanzees (usually treated in the genus Pan), and maybe the gorillas (usually treated in the genus Gorilla) should also be included in the genus based on genetic similarities. Most scientists argue that chimpanzees and gorillas have too many anatomical differences between themselves and humans to be part of Homo. The genus Homo is most closely related to Kenyanthropus platyops, which is likely to be an ancestral species. Through that species, Homo is next most closely related to the group of extinct species in the genera Paranthropus and Australopithecus, whose evolutionary branch split off from the proto-Homo line some 5 million years ago.

The word homo is Latin for "man", in the original sense of "human being", or "person". The word "human" itself is from Latin humanus, an adjective cognate to homo, both derived from PIE dhǵhem- "earth"[1].

1 Species
- 1.1 Comparative table of Homo species
2 References
3 External links

[edit] Species

†Homo habilis (Handy Man)
†Homo rudolfensis (Rudolf Man)
†Homo ergaster (Working Man)
†Homo erectus (Upright Man)
†Homo floresiensis (Flores Man — discovered 2003)
†Homo antecessor (Predecessor Man)
†Homo heidelbergensis (Heidelberg Man)
†Homo neanderthalensis (Neanderthal Man)
†Homo rhodesiensis (Rhodesia Man)
†Homo cepranensis (Ceprano Man)
†Homo georgicus (Georgia Man)
Homo sapiens
- †Homo sapiens idaltu (elderly wise man — discovered 1997)
- Homo sapiens sapiens (Wise Man; modern humans)

H. heidelbergensis and H. neanderthalensis are closely related to each other and have been considered to be subspecies of H. sapiens, but analysis of mitochondrial DNA from Homo neanderthalensis fossils shows that H. neanderthalensis is more closely related to chimpanzees than H. sapiens is, thereby suggesting that H. sapiens is the more derived of the two.^[1] H. rhodesiensis and H. cepranensis are also more closely related to each other than to the other species.

[edit] Comparative table of Homo species

species	lived when (MYA)	lived where	adult length (m)	adult weight (kg)	brain volume (cm³)	fossil record	discovery / publication of name
H. habilis	2.5–1.5	Africa	1.0–1.5	30–55	600	many	1960/1964
H. rudolfensis	1.9	Kenya				1 skull	1972/1986
H. georgicus	1.8–1.6	Georgia			600	few	1999/2002
H. ergaster	1.9–1.25	E. and S. Africa	1.9		700–850	many	1975
H. erectus	2(1.25)–0.3 ^{[citations needed]}	Africa, Eurasia (Java, China, Caucasus)	1.8	60	900–1100	many	1891/1892
H. cepranensis	0.8?	Italy				1 skull cap	1994/2003
H. antecessor	0.8–0.35	Spain, England	1.75	90	1000	3 sites	1997
H. heidelbergensis	0.6–0.25	Europe, Africa, China	1.8	60	1100–1400	many	1908
H. neanderthalensis	0.23–0.03	Europe, W. Asia	1.6	55–70 (heavily built)	1200-1700	many	(1829)/1864
H. rhodesiensis	0.3–0.12	Zambia			1300	very few	1921
H. sapiens	0.25–present	worldwide	1.4–1.9	55–80	1000–1850	still living	—/1758
H. sapiens idaltu	0.16	Ethiopia			1450	3 craniums	1997/2003
H. floresiensis	0.10–0.012	Indonesia	1.0	25	400	7 individuals	2003/2004