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Ontogeny of Pan troglodytes and Macaca mulatta Metatarsal Cross‐sectional Properties and Comparisons to the Miocene Catarrhine Proconsul
Author(s) -
Organ Jason M.,
Dunsworth Holly M
Publication year - 2013
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.27.1_supplement.756.9
Subject(s) - ontogeny , troglodytes , biology , foot (prosody) , anatomy , juvenile , hylobates , zoology , ecology , philosophy , linguistics , genetics
Catarrhines differ in foot use, function, and anatomy between species and within species through ontogeny. For example, adult Pan and Macaca differ in hallucial anatomy and also in the relative distribution of ground reaction forces. Further, they experience different growth in hindlimb proportions, which may correlate with differences in locomotor ontogeny. These differences should be reflected in metatarsal (MT) cross‐sectional geometries (CSG). To test this hypothesis we measured the CSG of MTs 1–5 in a cross‐sectional ontogenetic sample of 80 M. mulatta and 74 P.troglodytes. Most of the CSG were collected with biplanar radiography and the latex cast method (LCM). However, an additional 28 juvenile M. mulatta individuals, too small for LCM, were recently scanned with microCT. Midshaft CSG were calculated using ImageJ. As expected, CSG are significantly different in both absolute and relative magnitude and patterning across the rays between the two species as well as the age groups within them, particularly in the hallux where Pan shows greater bending and torsional resistance. These results provide insight on foot use in fossils. MTs from six Proconsul individuals ranging from infant to adult were scanned with microCT. Proconsul MT CSG are similar in magnitude to those of Macaca, but share relative hallucial patterning with Pan. This research was funded by the Leakey Foundation and Penn State University. Grant Funding Source : N/A