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Comment
. 2017 Jun 14;3(6):e1602321.
doi: 10.1126/sciadv.1602321. eCollection 2017 Jun.

Comment (1) on "Formation of the Isthmus of Panama" by O'Dea et al

Carlos Jaramillo  1 , Camilo Montes  2 , Agustín Cardona  3 , Daniele Silvestro  4 , Alexandre Antonelli  4   5   6 , Christine D Bacon  4
Affiliations
Comment

Comment (1) on "Formation of the Isthmus of Panama" by O'Dea et al

Carlos Jaramillo et al. Sci Adv. .

Abstract

A review and reanalysis of geological, molecular, and paleontological data led O'Dea et al. (1) to propose (i) that reports by Montes et al. (2) and Bacon et al. (3) regarding a middle Miocene closure of the Central American Seaway (CAS) are unsupported, and (ii) a new age of the formation of the Isthmus at 2.8 million years ago (Ma). Here, we reject both of these conclusions.

Keywords: Divergence; Marine environment; Vicariance; Zircon.

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Figures

Fig. 1
Fig. 1. Data from O’Dea et al. [table S2 plotted and categorized (1)].
Colored circles show that none of the 131 localities listed in that publication could be sources for the Panamanian signal in middle Miocene sediments reported by Montes et al. (2). Location of suture after Duque-Caro (16) mapped onto a geological map of Colombia (17). One hundred eighteen of those ages do not represent valid ages for a possible source rock derived from South America. Inset shows that 13 ages that do date South American source rocks are significantly older (t test, P < 0.001, df = 19.8) than the middle Eocene Panamanian signal reported in Montes et al. (2).
Fig. 2
Fig. 2. Data from O’Dea et al. [table S3 analyzed and plotted (1)].
Rate through time plot showing the tempo of vicariance events (estimated number of events per million year) in marine organisms inferred from the data presented in table S3 of O’Dea et al. (1). Shaded area shows the 95% confidence interval (95% CI) around the rate estimates based on 1000 replicated analyses, in which the ages of the vicariance events were resampled from the age intervals presented in O’Dea et al. (1). Two statistically significant shifts in vicariance rate are detected, at 12 Ma (95% CI: 14.77 to 9.76 Ma) and 3.01 Ma (95% CI: 4.65 to 1.61 Ma). The red dashed line shows the new, 2.8-Ma date for the formation of the Isthmus of Panama proposed by O’Dea et al. (1).
See this image and copyright information in PMC

Comment on

  • Formation of the Isthmus of Panama.
    O'Dea A, Lessios HA, Coates AG, Eytan RI, Restrepo-Moreno SA, Cione AL, Collins LS, de Queiroz A, Farris DW, Norris RD, Stallard RF, Woodburne MO, Aguilera O, Aubry MP, Berggren WA, Budd AF, Cozzuol MA, Coppard SE, Duque-Caro H, Finnegan S, Gasparini GM, Grossman EL, Johnson KG, Keigwin LD, Knowlton N, Leigh EG, Leonard-Pingel JS, Marko PB, Pyenson ND, Rachello-Dolmen PG, Soibelzon E, Soibelzon L, Todd JA, Vermeij GJ, Jackson JB. O'Dea A, et al. Sci Adv. 2016 Aug 17;2(8):e1600883. doi: 10.1126/sciadv.1600883. eCollection 2016 Aug. Sci Adv. 2016. PMID: 27540590 Free PMC article. Review.

References

    1. O’Dea A., Lessios H. A., Coates A. G., Eytan R. I., Restrepo-Moreno S. A., Cione A. L., Collins L. S., de Queiroz A., Farris D. W., Norris R. D., Stallard R. F., Woodburne M. O., Aguilera O., Aubry M.-P., Berggren W. A., Budd A. F., Cozzuol M. A., Coppard S. E., Duque-Caro H., Finnegan S., Gasparini G. M., Grossman E. L., Johnson K. G., Keigwin L. D., Knowlton N., Leigh E. G., Leonard-Pingel J. S., Marko P. B., Pyenson N. D., Rachello-Dolmen P. G., Soibelzon E., Soibelzon L., Todd J. A., Vermeij G. J., Jackson J. B. C., Formation of the Isthmus of Panama. Sci. Adv. 2, e1600883 (2016). - PMC - PubMed
    1. Montes C., Cardona A., Jaramillo C., Pardo A., Silva J. C., Valencia V., Ayala C., Pérez-Angel L. C., Rodriguez-Parra L. A., Ramirez V., Niño H., Middle miocene closure of the Central American Seaway. Science 348, 226–229 (2015). - PubMed
    1. Bacon C. D., Silvestro D., Jaramillo C., Smith B. T., Chakrabarty P., Antonelli A., Biological evidence supports an early and complex emergence of the Isthmus of Panama. Proc. Natl. Acad. Sci. U.S.A. 112, 6110–6115 (2015). - PMC - PubMed
    1. C. A. Jaramillo, in Mountains, Climate and Biodiversity, C. Hoorn, A. Antonelli, Eds. (John Wiley & Sons, 2016).
    1. F. Herrera, S. R. Manchester, R. Koll, C. Jaramillo, in Paleobotany and Biogeography: A Festschrift for Alan Graham in His 80th Year, W. D. Stevens, O. M. Montiel, P. Raven, Eds. (Missouri Botanical Garden Press, 2014), vol. 128, pp. 134–253.