External Ear morphology
Comparisons indicated that humans and orangutans share a unique configuration and proximity of the inner and outer helix where the two structures are closely aligned midway between the top and bottom. This feature was first recognized by Claudia Violette.
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For further information on the evidence for humans sharing a most recent common ancestor with the orangtutan please visit the Orangutans and Human Origins page.
| HOMINOIDEA | ||
| Hominidae | ||
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Homo sapiens Inner and outer helix closely alinged along mid region of ear. Characteristic possibly uniquely shared with orangutan |
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| Al Parker | Deidre Dawkins | |
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| Lynn Metzger | Meghan Dye | |
| Pongidae | ||
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Pongo pygmaeus Inner helix closely justaposed with outer helix along med region of ear. Possilby uniquely shared feature with humans. Sharp angle of justaposition possilby unique to orangutans |
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| Satu. Courtesy ZooAtlanta | Chantek. Courtesy ZooAtlanta | |
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| Allen. Courtesy ZooAtlanta | Bernas. Courtesy ZooAtlanta | |
| Panidae | ||
| Pan paniscus |  |
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| Courtesy Rick Murphy | ||
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Pan troglodytes Inner and outer helix widely spaced apart |
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| Juvenile. Courtesy Rick Murphy | MacDonald 2006 | |
| Pan |  |
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| Web image | ||
| Gorilla gorilla beringei |  |
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| Courtesy Rick Murphy | ||
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Gorilla gorilla gorilla Transverse bar between inner and outer helix (arrowed). Possibliy unique to some gorillas and some chimpanzees. Note that inner and outer helix run more or less parallel |
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| Male, Courtesy Rick Murphy | Shamba. Courtesy ZooAtlanta | |
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| Jasiri. Courtesy ZooAtlanta | Machi. Courtesy ZooAtlanta | |
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| Mbeli. Courtesy Stephanie Scanlin, ZooAtlanta | Olympia. Courtesy Stephanie Scanlin, ZooAtlanta | |
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| Ozzie. Courtesy ZooAtlanta | Charlie. Courtesy ZooAtlanta | |
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| Kali. Courtesy ZooAtlanta | Coomba. Courtesy ZooAtlanta | |
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| Olympia. Courtesy ZooAtlanta | Kekla. Courtesy ZooAtlanta | |
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| Stadi. Courtesy ZooAtlanta | ||
| Hylobatidae | ||
| Hylobates agilis |  |
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| Courtesy Kelly Boyer, Houston Zoo | ||
| Hylobates klossii |  |
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| Courtesy Thomas Geismann | ||
| Hylobates lar |  |
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| Courtesy Thomas Geismann | Schultz 1944 | |
| Hylobates syndactylus |  |
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| From cast. Courtesy Thomas Geismann | ||
| PLATYRRHINI | ||
| CALLITRIDAE | ||
| Callimico goeldii |  |
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| Hill, 1953 | ||
| Callithrix jacchus |  |
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| Courtesy Noel Rowe | ||
| Callithrix pygmaea |  |
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| Hill, 1953 | ||
| Leontopithecus rosalia |  |
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| Spree. Courtesy ZooAtlanta | Dionisio. Courtesy ZooAtlanta | |
| Leontopithecus rosalia |  |
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| Theo. Courtesy ZooAtlanta | ||
| Saguinus fusicollis |  |
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| Hill, 1953 | ||
| CEBIDAE | ||
| Aotinae | ||
| Aotus trivirgatus |  |
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| Hill 1953 | ||
| Alouattinae | ||
| Alouatta belzebul |  |
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| juvenile female. Hill 1953 | ||
| Atelinae | ||
| Ateles belzebuth |  |
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| A. belzebuth hybridus. Hill 1953 | ||
| Brachyteles arachnoides |  |
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| Hill 1953 | ||
| Lagothrix lagotricha |  |
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| Callicebinae | L. cana. Hill 1953 | |
| Callicebus sp. |  |
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| Courtesy Noel Rowe | Hill 1953 | |
| Cebinae | ||
| Cebus capucinus |  |
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| Hill, 1953 | ||
| Saimiri | ||
| Pitheciinae | ||
| Cacajao ayresii |  |
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| Courtesy Ítalo Mourthé CPEC-INPA, Brasil | ||
| Cacajao rubicundus |  |
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| C. ubicundus ucayali male. Hill 1953, p. 225 | ||
| Chiropotes | ||
| Pithecia | ||
| CATARHINII | ||
| Cercopithecidae | ||
| Cercopithecinae | ||
| Allenopithecus nigroviridis |  |
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| Male, Hill 1953 | ||
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Cercopithecus hamlyni |
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| Male, Hill 1953 | ||
| Cercopithecus mona |  |
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| Lisa. Courtesy ZooAtlanta | ||
| Cerocebus atys atys |  |
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| Cerocebus torquatus |  |
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| Courtesy Noel Rowe | ||
| Hill 1953 | ||
| Chlorocebus athiops Vervet monkey (contributed as Cercocebus athiops pyrgerythus) |
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| Courtesy Sylvain Gatti | ||
| Chlorocebus cynosuros |  |
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| Courtesy Noel Rowe | ||
| Erythrocebus patas |  |
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| Male. Courtesy Noel Rowe | Female, Hill 1953 | |
| Lophocebus | ||
| Macaca assamensis |  |
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| Juvenile. Courtesy Noel Rowe | ||
| Macaca fascicularis |  |
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| Courtesy Françoise Noël | ||
| Macaca mulatta |  |
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| Courtesy Adrian Shepherd | ||
| Macaca pagensis |  |
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| Male. Courtesy Noel Rowe | ||
| Macaca radiata |  |
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| Female. Courtesy Noel Rowe | ||
| Macaca sinica |  |
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| Female. Courtesy Noel Rowe | ||
| Mandrillus leucophaeus |  |
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| Bobby. Courtesy ZooAtlanata | Aiku. Courtesy ZooAtlanta | |
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| Enwe. Courtesy ZooAtlanta | ||
| Mandrillus sphinx |  |
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| Courtesy Rick Murphy | Newborn male. Hill 1953 | |
| Miopithecus sp. |  |
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| Juvenile. Courtesy Noel Rowe | ||
| Miopithecus talapoin |
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| Male, Hill 1953 | ||
| Miopithecus talapoin |  |
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| Female, courtesy Janette Wallis | Female, Hill 1953 | |
| Papio hamadryas anubis |  |
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| Juvenile female, Hill 1953 | ||
| Papio hamadryas cynocephalus |  |
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| Female, Hill 1953 | ||
| Papio hamadryas hamadryas | ||
| Papio hamadryas papio female |  |
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| Male, Hill 1953 | ||
| Papio hamadryas ursinus |
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| Female, Hill 1953 | ||
| Theropithecus | ||
| Colobinae | ||
| Colobus | ||
| Nasalis larvatus |  |
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| By permission, from Rowe 1996 | ||
| Presbytis | ||
| Procolobus | ||
| Pygathrix | ||
| Semnopithecus entellus |  |
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| Courtesy Adrian Shepherd | ||
| Trachypithecus | ||
| TARSIFORMES | ||
| TARSIIDAE | ||
| Tarsier dianae |  |
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| From Rowe 1996 | ||
| STREPSIRRHINI | ||
| GALGONIDAE | ||
| Galgo molholi |  |
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| By permission, from Rowe 1996 | ||
| Otolemur crassicaudatus |  |
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| Courtesy Noel Rowe | ||
| Otolemur garnetii |  |
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| By permission, from Rowe 1996 | ||
| LORIDAE | ||
| Arctocebus calabarensis |  |
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| By permission, from Rowe 1996 | ||
| LEMURIFORMES | ||
| CHEIROGALIDAE | ||
| Microcebus rufus |  |
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| Courtesy Stacey Tecot, The University of Texas at Austin | ||
| LEMURIDAE | ||
| Eulemur macaco |  |
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| Julius. Courtesy ZooAtlanta | ||
| Eulemur rubriventer |  |
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| Courtesy Stacey Tecot, The University of Texas at Austin | ||
| Lemur catta |  |
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| Julius. Courtesy ZooAtlanta | ||
| Varecia variegata |  |
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| Potter. Courtesy ZooAtlanta | Fleur. Courtesy ZooAtlanta |
