Three-Dimensional Geometric Morphometric Analysis of Fossil Canid Mandibles and Skulls

Abby Grace Drake, Michael Coquerelle, Pavel A. Kosintsev, Olga P. Bachura, Mikhail Sablin, Andrei V. Gusev, Lacey S. Fleming, Robert J. Losey

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Abstract

Much of the fossil record for dogs consists of mandibles. However, can fossil canid mandibles be reliably identified as dogs or wolves? 3D geometric morphometric analysis correctly classifies 99.5% of the modern dog and wolf mandibles. However, only 4 of 26 Ust’-Polui fossil mandibles, a Russian Arctic site occupied from 250BCE to 150CE, were identified as dogs and none of the 20 Ivolgin mandibles, an Iron Age site in southern Russia, were identified as dogs. Three of the Ust’-Polui mandibles and 8 of the Ivolgin mandibles were identified as wolves. In contrast, all 12 Ivolgin skulls and 5 Ust’-Polui skulls were clearly identified as dogs. Only the classification of the UP6571 skull as a dog (Dog Posterior Probability = 1.0) was not supported by the typical probability. Other evidence indicates these canids were domesticated: they were located within human dwellings, remains at both sites have butchery marks indicating that they were consumed, and isotope analysis of canid and human remains from Ust’-Polui demonstrate that both were consuming freshwater protein; indicating that the humans were feeding the canids. Our results demonstrate that the mandible may not evolve as rapidly as the cranium and the mandible is not reliable for identifying early dog fossils.
Original languageEnglish
Article number9508
Pages (from-to)1-8
Number of pages8
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 25 Aug 2017

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canid
skull
fossil
analysis
dog
cranium
Iron Age
fossil record
isotope
protein

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Drake, A. G., Coquerelle, M., Kosintsev, P. A., Bachura, O. P., Sablin, M., Gusev, A. V., ... Losey, R. J. (2017). Three-Dimensional Geometric Morphometric Analysis of Fossil Canid Mandibles and Skulls. Scientific Reports, 7, 1-8. [9508]. https://doi.org/10.1038/s41598-017-10232-1

Three-Dimensional Geometric Morphometric Analysis of Fossil Canid Mandibles and Skulls. / Drake, Abby Grace; Coquerelle, Michael; Kosintsev, Pavel A. ; Bachura, Olga P.; Sablin, Mikhail; Gusev, Andrei V.; Fleming, Lacey S.; Losey, Robert J.

In: Scientific Reports, Vol. 7, 9508, 25.08.2017, p. 1-8.

Research output: Contribution to journalArticle

Drake, AG, Coquerelle, M, Kosintsev, PA, Bachura, OP, Sablin, M, Gusev, AV, Fleming, LS & Losey, RJ 2017, 'Three-Dimensional Geometric Morphometric Analysis of Fossil Canid Mandibles and Skulls', Scientific Reports, vol. 7, 9508, pp. 1-8. https://doi.org/10.1038/s41598-017-10232-1
Drake AG, Coquerelle M, Kosintsev PA, Bachura OP, Sablin M, Gusev AV et al. Three-Dimensional Geometric Morphometric Analysis of Fossil Canid Mandibles and Skulls. Scientific Reports. 2017 Aug 25;7:1-8. 9508. https://doi.org/10.1038/s41598-017-10232-1
Drake, Abby Grace ; Coquerelle, Michael ; Kosintsev, Pavel A. ; Bachura, Olga P. ; Sablin, Mikhail ; Gusev, Andrei V. ; Fleming, Lacey S. ; Losey, Robert J. / Three-Dimensional Geometric Morphometric Analysis of Fossil Canid Mandibles and Skulls. In: Scientific Reports. 2017 ; Vol. 7. pp. 1-8.
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abstract = "Much of the fossil record for dogs consists of mandibles. However, can fossil canid mandibles be reliably identified as dogs or wolves? 3D geometric morphometric analysis correctly classifies 99.5{\%} of the modern dog and wolf mandibles. However, only 4 of 26 Ust’-Polui fossil mandibles, a Russian Arctic site occupied from 250BCE to 150CE, were identified as dogs and none of the 20 Ivolgin mandibles, an Iron Age site in southern Russia, were identified as dogs. Three of the Ust’-Polui mandibles and 8 of the Ivolgin mandibles were identified as wolves. In contrast, all 12 Ivolgin skulls and 5 Ust’-Polui skulls were clearly identified as dogs. Only the classification of the UP6571 skull as a dog (Dog Posterior Probability = 1.0) was not supported by the typical probability. Other evidence indicates these canids were domesticated: they were located within human dwellings, remains at both sites have butchery marks indicating that they were consumed, and isotope analysis of canid and human remains from Ust’-Polui demonstrate that both were consuming freshwater protein; indicating that the humans were feeding the canids. Our results demonstrate that the mandible may not evolve as rapidly as the cranium and the mandible is not reliable for identifying early dog fossils.",
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N1 - Acknowledgements We thank C.P. Klingenberg for critical discussion of methodology. A. Drake and R. Losey were supported by a grant from the Social Sciences and Humanities Research Council of Canada grant (#SSHRC IG 435-2014-0075) and a European Research Council Grant to D. Anderson (#295458). M. Sablin acknowledges participation of ZIN RAS (state assignment № АААА-А17-117022810195-3) to this research. Supplementary information accompanies this paper at doi:10.1038/s41598-017-10232-1

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N2 - Much of the fossil record for dogs consists of mandibles. However, can fossil canid mandibles be reliably identified as dogs or wolves? 3D geometric morphometric analysis correctly classifies 99.5% of the modern dog and wolf mandibles. However, only 4 of 26 Ust’-Polui fossil mandibles, a Russian Arctic site occupied from 250BCE to 150CE, were identified as dogs and none of the 20 Ivolgin mandibles, an Iron Age site in southern Russia, were identified as dogs. Three of the Ust’-Polui mandibles and 8 of the Ivolgin mandibles were identified as wolves. In contrast, all 12 Ivolgin skulls and 5 Ust’-Polui skulls were clearly identified as dogs. Only the classification of the UP6571 skull as a dog (Dog Posterior Probability = 1.0) was not supported by the typical probability. Other evidence indicates these canids were domesticated: they were located within human dwellings, remains at both sites have butchery marks indicating that they were consumed, and isotope analysis of canid and human remains from Ust’-Polui demonstrate that both were consuming freshwater protein; indicating that the humans were feeding the canids. Our results demonstrate that the mandible may not evolve as rapidly as the cranium and the mandible is not reliable for identifying early dog fossils.

AB - Much of the fossil record for dogs consists of mandibles. However, can fossil canid mandibles be reliably identified as dogs or wolves? 3D geometric morphometric analysis correctly classifies 99.5% of the modern dog and wolf mandibles. However, only 4 of 26 Ust’-Polui fossil mandibles, a Russian Arctic site occupied from 250BCE to 150CE, were identified as dogs and none of the 20 Ivolgin mandibles, an Iron Age site in southern Russia, were identified as dogs. Three of the Ust’-Polui mandibles and 8 of the Ivolgin mandibles were identified as wolves. In contrast, all 12 Ivolgin skulls and 5 Ust’-Polui skulls were clearly identified as dogs. Only the classification of the UP6571 skull as a dog (Dog Posterior Probability = 1.0) was not supported by the typical probability. Other evidence indicates these canids were domesticated: they were located within human dwellings, remains at both sites have butchery marks indicating that they were consumed, and isotope analysis of canid and human remains from Ust’-Polui demonstrate that both were consuming freshwater protein; indicating that the humans were feeding the canids. Our results demonstrate that the mandible may not evolve as rapidly as the cranium and the mandible is not reliable for identifying early dog fossils.

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