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The primate semicircular canal system and locomotion
- F. Spoor, T. Garland, G. Krovitz, T. Ryan, M. Silcox, A. Walker
- Biology, EngineeringProceedings of the National Academy of Sciences
- 26 June 2007
Quantitative phylogenetically informed analysis of the radius of curvature of the three semicircular canals in 91 extant and recently extinct primate species and 119 other mammalian taxa provide support for the hypothesis that canal size varies in relation to the jerkiness of head motion during locomotion.
Implications of new early Homo fossils from Ileret, east of Lake Turkana, Kenya
Two new cranial fossils from the Koobi Fora Formation, east of Lake Turkana in Kenya, are described that have bearing on the relationship between species of early Homo and confirm the distinctiveness of H.’shabilis and H.erectus, independently of overall cranial size, and suggest that these two early taxa were living broadly sympatrically in the same lake basin for almost half a million years.
New hominin genus from eastern Africa shows diverse middle Pliocene lineages
New fossils discovered west of Lake Turkana, Kenya, which differ markedly from those of contemporary A. afarensis point to an early diet-driven adaptive radiation, provide new insight on the association of hominin craniodental features, and have implications for the understanding of Plio–Pleistocene hom inin phylogeny.
Comparative review of the human bony labyrinth.
This review compares the bony labyrinth of humans with that of the great apes and 37 other primate species based on data newly acquired with computed tomography combined with previous descriptions, finding that labyrinthine and basicranial shape are interspecifically correlated in the sample, and in most respects the human morphology is consistent with the general trend among primates.
A juvenile early hominin skeleton from Dikika, Ethiopia
The foot and other evidence from the lower limb provide clear evidence for bipedal locomotion, but the gorilla-like scapula and long and curved manual phalanges raise new questions about the importance of arboreal behaviour in the A. afarensis locomotor repertoire.
Vestibular evidence for the evolution of aquatic behaviour in early cetaceans
- F. Spoor, S. Bajpai, S. Hussain, K. Kumar, J. Thewissen
- Biology, Environmental ScienceNature
- 9 May 2002
It is hypothesized that the unparalleled modification of the semicircular canal system represented a key ‘point of no return’ event in early cetacean evolution, leading to full independence from life on land.
Implications of early hominid labyrinthine morphology for evolution of human bipedal locomotion
A systematic attempt to reconstruct the locomotor behaviour of early hominids by looking at a major component of the mechanism for the unconscious perception of movement, namely by examining the vestibular system of living primates and earlyhominids.
The bony labyrinth of Neanderthals.
Semicircular canal system in early primates.
Morphometry of the primate bony labyrinth: a new method based on high-resolution computed tomography.
Comparison of the measurements taken from CT scans with those taken from subsequently made casts and cryosections demonstrates that the method is sufficiently accurate to permit the morphometric analysis of labyrinthine size and shape.