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. 2015 Sep 1;3:e1227. doi: 10.7717/peerj.1227

Table 3. Relative orbit size (ROS) in Isthminia panamensis, and in other fossil and modern odontocetes, ranked in increasing value.

Genus Species Specimen ROS Source
Aulophyseter morricei LACM 154100, USNM 11230 0.20 This study (average, n = 2)
Orycterocetus crocodilinus USNM 22926 0.22 This study
Inia geoffrensis USNM 23967, 49582, 395415 0.24 This study (average, n = 3)
Lipotes vexillifer USNM 218293 0.32 This study
Aprixokogia kelloggi USNM 187015 0.34 This study
Lophocetus repenningi USNM 23886 0.36 This study
Simocetus rayi USNM 356517 0.36 This study
Isthminia panamensis USNM 546125 0.40 This study
Nanokogia isthmia UF 280000 0.40 Velez-Juarbe et al., 2015
Xiphiacetus bossi USNM 8842, 175381 0.42 This study (average, n = 2)
Delphinodon dividum USNM 7278 0.46 This study
Kogia sima LACM 47142 0.55 This study
Meherrinia isoni IRSNB M.2013 0.56 Geisler, Godfrey & Lambert, 2012
Pontoporia blainvillei USNM 482707, 482717, 482771 0.57 This study (average, n = 3)
Atocetus nasalis LACM 30093 0.58 Barnes, 1985a
Kentriodon pernix USNM 8060 0.58 This study
Parapontoporia wilsoni UCMP 83790 0.62 Barnes, 1985b
Brachydelphis jahuayensis MNHN PPI 267, 268; MUSM 567, 568 0.70 Lambert & de Muizon, 2013 (average, n = 4)
Brachydelphis mazeasi MNHN PPI 121, 266; MUSM 564 0.80 Lambert & de Muizon, 2013 (average, n = 3)