Diagonal Length of the Malar

Malar length is defined as an index of orbitale-zygomaxillare divided by orbital height. The mean for the extant hominids is 1.05, with one standard deviation of 0.15 (n = 122 specimens). Thus, the intermediate range falls between 0.90 and 1.20. All data for the fossil hominins was taken from B.A. Wood (1991). The minimum extant hominid value is 0.75 and the maximum value is 1.56. A long malar (= 0) is observed in P. walkeri specimen KNM-WT 17000 with an index of 1.23, P. boisei with a mean index of 1.22 (n = 3), K. rudolfensis defined by KNM-ER 1470 with an index of

I.23, and Gorilla with a mean of 1.21 (n = 35). The intermediate condition (= 1) is observed in P. robustus defined by specimen SK 48 with an index of 1.00, Pongo with a mean index of 1.01 (n = 21), H. ergaster with a mean index of 1.12 (n = 2), and Pan with a mean index of 0.97 (n = 66). A short malar (= 2) is observed in Australopithecus with a mean index of 0.88 (n = 2), H. habilis specimen OH 24 with an index of 0.84, and H. sapiens with a mean index of 0.88 (n = 8).

0 0

Post a comment