Ekembo

Ekembo
Temporal range: Miocene, 20–11.608 Ma
"Ekembo nyanzae" skeleton (formerly "Proconsul nyanzae")
Ekembo nyanzae skeleton (formerly Proconsul nyanzae)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Parvorder: Catarrhini
Superfamily: Hominoidea
Genus: †Ekembo
McNulty et al., 2015
Species

Ekembo is an early ape (hominoid) genus found in 17- to 20-million-year-old sediments from the Miocene epoch. Specimens have been found at sites around the ancient Kisingiri volcano in Kenya on Rusinga Island and Mfangano Island in Lake Victoria. The name Ekembo is Suba for "ape" or "monkey".[1]

To account for substantial morphological variation in the genus Proconsul, two species, P. nyanzae and P. heseloni, were placed in the new genus Ekembo. Ekembo is one of the earliest ape (Hominoids), after having diverged from the old world monkeys. The Dendropithecidae appear to be sister to Ekembo. Ekembo was found to be paraphyletic with respect to Proconsul and the more advanced Hominoidea.[2][3]

Description

Ekembo is distinguished from other early Miocene catarrhines on the basis of dental and mandibular morphology. The molars of Ekembo are more rounded or bunodont than those of Proconsul and the canine teeth taper to a point while those of Proconsul are more "blade-like". E. heseloni is medium-sized while E. nyanzae is larger. Both E. nyanzae and E. heseloni are moderately sexually dimorphic.

Skull of Ekembo heseloni from Kenya

References

  1. ^ Kieran P. McNulty, David R. Begun, Jay Kelley, Fredrick K. Manthi and Emma N. Mbua (2015). "A systematic revision of Proconsul with the description of a new genus of early Miocene hominoid". Journal of Human Evolution. 84: 42-61. doi:10.1016/j.jhevol.2015.03.009.
  2. ^ Rossie, James B.; Hill, Andrew (2018-12-01). "A new species of Simiolus from the middle Miocene of the Tugen Hills, Kenya". Journal of Human Evolution. 125: 50–58. Bibcode:2018JHumE.125...50R. doi:10.1016/j.jhevol.2018.09.002. ISSN 0047-2484. PMID 30502897. S2CID 54625375.
  3. ^ Rasmussen, D. Tab; Friscia, Anthony R.; Gutierrez, Mercedes; Kappelman, John; Miller, Ellen R.; Muteti, Samuel; Reynoso, Dawn; Rossie, James B.; Spell, Terry L. (2019-03-11). "Primitive Old World monkey from the earliest Miocene of Kenya and the evolution of cercopithecoid bilophodonty". Proceedings of the National Academy of Sciences. 116 (13): 6051–6056. Bibcode:2019PNAS..116.6051R. doi:10.1073/pnas.1815423116. ISSN 0027-8424. PMC 6442627. PMID 30858323.