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  • Title: Some additional morphological and metrical observations on Pan brain casts and their relevance to the Taung endocast.
    Author: Holloway RL.
    Journal: Am J Phys Anthropol; 1988 Sep; 77(1):27-33. PubMed ID: 3189521.
    Abstract:
    Using an increased sample of chimpanzee brains and brain casts, 32 hemispheres were measured to determine the variability of OP-FP (occipital-pole) and OP-LS (occipital pole-lunate sulcus) arc dimensions and their ratios. The Taung endocast was remeasured to test Falk's assertions that the lunate sulcus is in a pongid position. The average ratio for the chimpanzee brains was 0.218, a value more than 2+ S.D.'s posterior to Falk's placement of the lunate sulcus on the Taung specimen. It is suggested that the chimpanzee and Taung occipital poles have a different morphometric pattern, the former being coincident with the caudal end of the LC (lateral calcarine) fissure. The Taung OP-LS arc consistently measured at least 42 mm, and not 40 mm as claimed by Falk.
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