The megatooth shark, Otodus megalodon, is widely accepted as the largest macrophagous shark that ever lived; and yet, despite over a century of research, its size is still debated. The great white shark, Carcharodon carcharias, is regarded as the best living ecological analog to the extinct megatooth shark and has been the basis for all body length estimates to date. The most widely accepted and applied method for estimating body size of O. megalodon was based upon a linear relationship between tooth crown height and total body length in C. carcharias. However, when applying this method to an associated dentition of O. megalodon (UF-VP-311000), the estimates for this single individual ranged from 11.4 to 41.1 m. These widely variable estimates showed a distinct pattern, in which anterior teeth resulted in lower estimates than posterior teeth. Consequently, previous paleoecological analyses based on body size estimates of O. megalodon may be subject to misinterpretation. Herein, we describe a novel method based on the summed crown width of associated fossil dentitions, which mitigates the variability associated with different tooth positions. The method assumes direct proportionality between the ratio of summed crown width to body length in ecologically and taxonomically related fossil and modern species. Total body lengths were estimated from 11 individuals, representing five lamniform species: Otodus megalodon, Otodus chubutensis, Carcharodon carcharias, Carcharodon hubbelli, and Carcharodon hastalis. The method was extrapolated for the largest known isolated upper tooth of O. megalodon, resulting in a maximum body length estimate of 20 m.

Paleontology is an interdisciplinary field that attracts a range of individuals, from hobbyists to professionals. A primary goal of the NSF-funded FOSSIL Project is to establish a unified community of paleontologists and promote best practices in the field of paleontology. The Belgrade PaleoBlitz was a pilot effort to meet these goals by guiding participants through the museum curation process via a rapid two-day immersion. The objectives of the PaleoBlitz event were to: 1) educate participants in best practices associated with the museum curation process, and 2) catalog specimens collected from the Belgrade Quarry into the Florida Museum of Natural History vertebrate paleontology collections. These objectives seek to find a balance between educating participants and contributing to science. A pre-event application dispersed to amateur paleontology clubs throughout the United States determined applicants' baseline content knowledge and practices. To facilitate learning and promote networking, we selected 13 participants who varied in expertise from six different paleontology organizations. Immediate and delayed post-event surveys assessed acceptance and implementation of best practices, confidence related to specific aspects of the museum curation process, and expansion of individuals' personal paleontology network. Responses showed that all participants made changes to their existing collections, felt more confident in specific aspects of the museum curation process, and had continued connections with other participants after this event.

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Paleontology is an interdisciplinary field that attracts a range of individuals, from hobbyists to professionals. A primary goal of the NSF-funded FOSSIL Project is to establish a unified community of paleontologists and promote best practices in the field of paleontology. The Belgrade PaleoBlitz was a pilot effort to meet these goals by guiding participants through the museum curation process via a rapid two-day immersion. The objectives of the PaleoBlitz event were to: 1) educate participants in best practices associated with the museum curation process, and 2) catalog specimens collected from the Belgrade Quarry into the Florida Museum of Natural History vertebrate paleontology collections. These objectives seek to find a balance between educating participants and contributing to science. A pre-event application dispersed to amateur paleontology clubs throughout the United States determined applicants' baseline content knowledge and practices. To facilitate learning and promote networking, we selected 13 participants who varied in expertise from six different paleontology organizations. Immediate and delayed post-event surveys assessed acceptance and implementation of best practices, confidence related to specific aspects of the museum curation process, and expansion of individuals' personal paleontology network. Responses showed that all participants made changes to their existing collections, felt more confident in specific aspects of the museum curation process, and had continued connections with other participants after this event.

No abstract