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Madagascar. 11Omaha’s Henry Doorly Zoo, Omaha, NE
68107, USA. 12Western University, London, ON, N6A 5C2,
Canada. 13American Museum of Natural History, New York,
NY 10024, USA. 14Association Mitsinjo, Andasibe 514,
Madagascar. 15University of Veterinary Medicine Vienna,
1210, Vienna, Austria. 16SUNY at Stony Brook, NY 11794,
USA. 17Duke Lemur Center, Durham, NC 27705, USA.
18Université de Mahajanga, Mahajanga 401, Madagascar.
*Corresponding author. E-mail: firstname.lastname@example.org
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TECHNICAL COMMENT ABSTRACTS
Comment on “A Complete Skull
from Dmanisi, Georgia, and the
Evolutionary Biology of Early Homo”
Jeffrey H. Schwartz, Ian Tattersall, Zhang Chi
Lordkipanidze et al. (Research Article, 18 October 2013,
p. 326) conclude, from gross morphological comparisons and geometric-morphometric analysis of general
shape, that the five hominid crania from Dmanisi in
Georgia represent a single regional variant of Homo
erectus. However, dental, mandibular, and cranial mor-phologies all suggest taxic diversity and, in particular,
validate the previously named H. georgicus.
Full text at http://dx.doi.org/10.1126/science.1250056
Response to Comment on “A
Complete Skull from Dmanisi,
Georgia, and the Evolutionary
Biology of Early Homo”
Christoph P. E. Zollikofer, Marcia S. Ponce
de León, Ann Margvelashvili, G. Philip
Rightmire, David Lordkipanidze
Schwartz et al. hold that variation among the Dmanisi
skulls reflects taxic diversity. The morphological obser-
vations to support their hypothesis, however, are partly
incorrect and not calibrated against intraspecific varia-
tion in living taxa. After proper adjustment, Schwartz et
al.’s data are fully compatible with the hypothesis of a
single paleodeme of early Homo at Dmanisi.
Full text at http://dx.doi.org/10.1126/science.1250081
CORRECTIONS AND CLARIFICATIONS
Perspectives: “Enzyme kinetics, past and present” by
X. S. Xie (20 December 2013, p. 1457). A production
error resulted in a misspelled word in the first sentence
of the paragraph in which Equation 4 appears; the sentence should read “In single-molecule turnover experiments, each enzyme experiences constant substrate and
product [not produce] concentrations in the volume of
interest (dashed circle).” In addition, bars should have
appeared over the constants kcat and KM in Equation 3. The
HTML and PDF versions online have been corrected.
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