Publications

2024

Clark*, R. O., F. R. O’Keefe, and S. Slack*. (2024). A new genus of small polycotylid plesiosaur from the Western Interior Seaway and a clarification of the genus Dolichorhynchops. Cretaceous Research 157, doi: 10.1016/j.cretres.2023.105812.

2023

Armour Smith*, E., and F. R. O’Keefe. (2023). Occurrence of Styxosaurus (Sauropterygia, Plesiosauria) in the Cenomanian: implications for relationships of elasmosaurids from the Wester Interior Seaway. Journal of Systematic Palaeontology 21:1, 2242846, doi: 10.1080/14772019.2023.2242846.

O’Keefe, F.R., R. E. Dunn, E. M. Weitzel, M. R. Waters, L. N. Martinez*, W. J. Binder, J. R. Southon, J. E. Cohen, J. A. Meachen, L.R.G. DeSantis, M. E. Kirby, E. Ghezzo, J. B. Coltrain, B. T. Fuller, A. B. Farrell, G. MacDonald, E. G. Davis, G. T. Takeuchi, E.L. Lindsey. (2023). Pre-Younger Dryas Megafaunal Extirpation at Rancho La Brea Linked to Anthropogenic State Shift. Science 381(6659) doi: 10.1126/science.abo3594.

2022

DeSantis, L. R. G., R. S. Feranec, J. Southon, K. Fox-Dobbs, T. E. Cerling, J. Harris, W. Binder, J. E. Cohen, A. B. Farrell, E. Lindsey, J. Meachen, F. R. O’Keefe, G. T. Takeuchi. (2022). On the relationship between collagen- and carbonate-derived carbon isotopes, with implications for the inference of carnivore dietary behavior. Frontiers in Ecology and Evolution doi: 10.3389/fevo.2022.1031383

Sidor, C. A., Ide, O., Larsson, H. C. E., O’Keefe, F. R., Smith, R. H., Steyer, J. S., and Modesto, S. P. (2022). The vertebrate fauna of the upper Permian of Niger—XI. Cranial material of a juvenile Moradisaurus grandis (Reptilia: Captorhinidae). Journal of Vertebrate Paleontology doi: 10.1080/02724634.2021.2030345.

2021

O’Keefe, F. R., Meachen, J. A., and Polly, D. P. (2021). On information rank deficiency in phenotypic covariance matrices. Systematic Biology, doi: 10.1093/sysbio/syab088.

Janssens, L. A., Boudadi-Maligne, M., Lawler, D., O’Keefe, F. R., and Van Dongen, S. (2021). Morphology based diagnostics of “protodogs’, a comment of Galeta et al., 2020. Anatomical Record 304: 42–62, doi: 10.1002/ar.24500.

O’Gorman, J. P., Otero, R. A., Hiller, N., O’Keefe, F. R., Scofield, R. P. and Fordyce, E. (2021). CT-Scan description of Alexandronectes zealandiensis (Elasmosauridae, Aristonectinae), with comments on the elasmosaurid internal cranial features. Journal of Vertebrate Paleontology doi: 10.1080/02724634.2021.1923310

Cohen, J. E., L. R. G. DeSantis, E. Lindsey, J. A. Meachen, F. R. O’Keefe, J. Southon, and W. J. Binder. (2021). Dietary stability inferred from dental mesowear analysis in large ungulates from Rancho La Brea and opportunistic feeding during the Pleistocene. Palaegeography, Palaeoclimatology, Palaeoecology doi: 10.1016/j.palaeo.2021.110360

2019

Morgan*, D. J., and F. R. O’Keefe. 2019. The axial osteology of a juvenile polycotylid plesiosaur from the Campanian of South Dakota, and a cladistic analysis of the Polycotylidae. Cretaceous Research 96:149-171.

O’Keefe, F. R., P. M. Sander, T. A. Wintrich, and S. Werning. 2019. Ontogeny of polycotylid long bone histology. Organismal and Integrative Biology 1. doi: 10.1093/iob/oby007

2018

Henson*, K., Constantino, P., O’Keefe, F. R., and Popovich, Greg. 2018. Three-dimensional scanning and printing techniques to analyze and archive human skeletal remains. Library Hi Tech. DOI: (10.1108/LHT-10-2017-0206).

Otero, R. A., S. Soto-Acuña, and F. R. O’Keefe. 2018. Osteology of Aristonectes quiriquinensis (Elasmosauridae, Aristonectinae) from the upper Maastrichtian of central Chile. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2017.1408638

2017

O’Keefe, F. R., R. A. Otero, S. Soto-Acuña, J. P. O’Gorman, S. J. Godfrey, and S. Chatterjee. 2017. Cranial anatomy of Morturneria seymourensis from Antarctica, and the evolution of filter feeding in plesiosaurs of the austral Late Cretaceous. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2017.1347570.

2016

Otero, R. A., J. P. O’Gorman, N. Hiller, F. R. O’Keefe, and R. E. Fordyce. 2016. Alexandronectes zealandiensis gen. et sp. nov., a new aristonectine plesiosaur for the lower Maastrichtian of New Zealand. Journal of Vertebrate Paleontology: e1054494. doi: 10.1080/02724634.2015.1054494

2015

Brannick*, A. L., J. A. Meachen, and F. R. O’Keefe. 2015. Microevolution of jaw shape in the dire wolf, Canis dirus, at Rancho La Brea. Contributions in Science, Science Series 42: 23-32.

Goswami, A., W. J. Binder, J. A. Meachen, and F. R. O’Keefe. 2015. The fossil record of phenotypic integration and modularity: a deep-time perspective on developmental and evolutionary dynamics. Proceedings of the National Academy of Sciences 112.16: 4891-4896. doi: 10.1073/pnas.1403667112

2014

McMullen*, S. K., S. M. Holland, and F. R. O’Keefe. 2014. The occurrence of vertebrate and invertebrate fossils in a sequence stratigraphic context: The Jurassic Sundance Formation, Bighorn Basin, Wyoming, USA. Palaios 29.6 (2014): 277-294. doi: 10.2110/pal.2013.132

O’Keefe, F. R., W. J. Binder, S. R. Frost, R. W. Sadleir*, and B. Van Valkenburgh. 2014. Cranial morphometrics of the dire wolf, Canis dirus, at Rancho La Brea: temporal variability and its links to nutrient stress and climate. Palaeontologia Electronica 17.1: 1-24.

Meachen, J. A., F. R. O’Keefe, and R. W. Sadleir*. 2014. Evolution in the sabre-tooth cat, Smilodon fatalis, in response to Pleistocene climate change. Journal of Evolutionary Biology 27: 714-723. Otero, R. A., S. Soto-Acuña, F. R. O’Keefe, J. P. O’Gorman, W. Stinnesbeck, M. E. Suárez, D. Rubilar-Rogers, C. Salazar, and L. A. Quinzio-Sinn. 2014. Aristonectes quiriquinensis sp. nov., a new highly derived elasmosaurid from the late Maastrichtian of central Chile. Journal of Vertebrate Paleontology 34: 100-125.

2013

O’Keefe, F. R., J. Meachen, E. V. Fet**, and A. Brannick*. 2013. Ecological determinants of morphological variation in the cranium of the North American gray wolf. Journal of Mammalogy 94: 1223-1236. doi: 10.1644/13-mamm-a-069

Holloway*, W. L., K. M. Claeson, and F. R. O’Keefe. 2013. A virtual phytosaur endocast and its implications for sensory system evolution in archosaurs. Journal of Vertebrate Paleontology 33: 848-857. doi: 10.1080/02724634.2013.747532

2012

O’Keefe, F. R. and C. J. Byrd*. 2012. The ontogeny of the shoulder girdle in Polycotylus latipinnus (Plesiosauria: Polycotylidae) and its bearing on plesiosaur viviparity. Paludicola 9: 21-31. doi: 10.1093/iob/oby007

2011

O’Keefe et al. Viviparity and K-Selected Life History in a Mesozoic Marine Plesiosaur (Reptilia, Sauropterygia). Science 12 August 2011: 870-873.

O’Keefe, F. R., H. P. Street, B. C. Wilhelm, C. Richards, and H. Zhu. 2011. A new skeleton of the cryptoclidid plesiosaur Tatenectes laramiensis reveals a novel body shape among plesiosaurs. Journal of Vertebrate Paleontology 31(2): 330-339.

2009

O’Keefe, F. R. and H. Street. 2009. Osteology of the Cryptocleidoid Plesiosaur Tatenectes Laramiensis, with Comments on the Taxonomic Status of the Cimoliasauridae. Journal of Vertebrate Paleontology 29(1):48–57, March 2009.

O’Keefe, F. R., H. P. Street, J. P. Cavigelli, J. J. Socha, and R. D. O’Keefe. 2009. A plesiosaur containing an ichthyosaur embryo as stomach contents from the Sundance Formation of the Bighorn Basin, Wyoming. Journal of Vertebrate Paleontology 29(4): 1306-1310.

O’Keefe, F. R., E. V. Fet, and J. M. Harris. 2009. Compilation, calibration, and synthesis of faunal and floral radiocarbon dates, Rancho La Brea, California. Contributions in Science 518: 1-16.

2008

O’Keefe, F. R. 2008. Cranial Anatomy and Taxonomy of Dolichorhynchops Bonneri New Combination, A Polycotlyid (Sauropterygia: Plesiosauria) from the Pierre Shale of Wyoming and South Dakota. Journal of Vertebrate Paleontology 28(3):664–676, September 2008

2006

O’Keefe, F. R. and N. Hiller. 2006. Morphologic and ontogenetic patterns in elasmosaur neck length, with comments on the taxonomic utility of neck length variables. Paludicola (Nicholls Memorial Volume) 5(4): 206-229.

O’Keefe, F. R., C. A. Sidor, H. C. E. Larsson, A. Maga, and O. Ide. 2006. Evolution and homology of the astragalus in early amniotes: new fossils, new perspectives. Journal of Morphology 267: 415-425.

O’Keefe, F. R. 2006. Neoteny and the plesiomorphic condition of the plesiosaur basicranium. in M. T. Carrano, T. J. Gaudin, R. W. Blob and J. R. Wible, eds. Amniote Paleobiology. University of Chicago Press, Chicago, Il.

2005

O’Keefe, F. R. and M. T. Carrano. 2005. Correlated trends in the evolution of the plesiosaur locomotor system. Paleobiology 31(4): 656-675.

O’Keefe, F. R., C. A. Sidor, H. C. E. Larsson, A. Maga, and O. Ide. 2005. The vertebrate fauna of the Upper Permian of Niger— III. Morphology and ontogeny of the hindlimb of Moradisaurus grandis (Reptila, Captorhinidae, Moradisaurinae) from the Upper Permian of Niger. Journal of Vertebrate Paleontology 25(2): 309-319.

2004

O’Keefe, F. R. 2004. Preliminary description and phylogenetic position of a new genus and species of plesiosaur (Reptilia: Sauropterygia) from the Toarcian of Holzmaden, Germany. Journal of Paleontology 78(5): 973-988.

2003

O’Keefe, F. R. and W. Wahl. 2003. Current taxonomic status of Pantosaurus striatus from the Upper Jurassic Sundance Formation, Wyoming. Paludicola 4(2): 37-47.

O’Keefe, F. R. and W. Wahl. 2003. Preliminary report on the osteology and relationships of a new aberrant cryptocleidoid plesiosaur from the Sundance Formation, Wyoming. Paludicola 4(2): 48-68.

2002

O’Keefe, F. R. 2002. The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia). Paleobiology 28(1), 101-112.

2001

O’Keefe, F. R. 2001. A cladistic analysis and taxonomic revision of the Plesiosauria (Reptilia: Sauropterygia). Acta Zoologica Fennica 213: 1-63.

O’Keefe, F. R. and P. J. Wagner. 2001. Inferring and testing hypotheses of cladistic character dependence using character compatibility. Systematic Biology 50(5): 657-675.

O’Keefe, F. R. 2001. Ecomorphology of plesiosaur flipper geometry. Journal of Evolutionary Biology 14(6): 987-991.

Cover of O’Keefe F.R. 2001. A cladistic analysis and taxonomic revision of the Plesiosauria (Reptilia: Sauropterygia). Acta Zoologica Fennica 213: 1-63.