Comment on "The Brain of LB1, Homo floresiensis"
R. D. Martin1*,
A. M. MacLarnon2,
J. L. Phillips1,3,
L. Dussubieux1,
P. R. Williams1 and
W. B. Dobyns4
1 The Field Museum, Chicago, IL 60605–2496, USA.
2 School of Human and Life Sciences, Roehampton University, London SW15 4JD, UK.
3 Department of Anthropology, University of Illinois at Chicago, IL 60607, USA.
4 Department of Human Genetics, University of Chicago, Chicago, IL 60637, USA.
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Fig. 1. Example of the dwarfing models presented in Table 1 showing the derivation of dwarf forms with the cranial capacity of LB1 from Ngandong H. erectus following the dwarfing models A to C. Body weight predictions for LB1 from all three models are substantially lower than the estimated values from the skeleton itself.
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Fig. 2. Comparison of LB1 and microcephalic skulls. (A) LB1 (1). (B) Left half-skull of a dentally adult male human microcephalic from India (15, 16) held in the collections of the Hunterian Museum, London (RCSHM/Osteo 95.1). The two skulls are drawn to the same scale and are similar in overall size and proportions and in features such as the receding forehead. (C) The left side of a human microcephalic endocast from the collections of the Field Museum, Chicago (accession no. A219680) derived from the skull of a 32-year-old woman from Lesotho who had the body size of a 12-year-old child (17). (D) An endocast from the Hunterian microcephalic specimen. Both (C) and (D) have relatively normal external appearance despite their very small size. Drawings by Jill Seagard.
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