TABLE 5 in Lutrinae Bonaparte, 1838 (Carnivora, Mustelidae) from the Plio-Pleistocene of the Lower Omo Valley, southwestern Ethiopia: systematics and new insights into the paleoecology and paleobiogeography of the Turkana otters

TABLE 5. — Tooth enamel δ18O values for extant and fossil otters, fossil terrestrial mammals and fossil hippopotamids from the Lower Omo Valley, and extant terrestrial carnivorans suggesting a terrestrial lifestyle for Enhydriodon omoensis n. sp. The most informative variable for % aquatic is the standard deviation (SD) of δ18O. Extant otters with low SD (<1‰) are c. 33 to> 50% aquatic, whereas taxa with higher SD (> 1‰) are not aquatic (<5%). Mean δ18O values are determined by source water. Extant carnivoran data from Clementz & Koch (2001); data for Aramis fossil Enhydriodon Falconer, 1868 from White et al. (2009). Abbreviations: E, estuary; FW, freshwater; KB, kelp bed; T, terrestrial. δ 18 O VPDBSpeciesLocalitynFeeding zone% AquaticmeanminmaxSDEnhydra lutris (Linnaeus, 1758) Sea otterCentral California, United States5KB> 50%−3.5−4.4−3.00.6Lontra canadensis (Schreber, 1777) River otterWashington, United States10Ec. 33%−5.0−6.5−3.60.9Lontra canadensis (Schreber, 1777) River otterOregon, United States7FWc. 33%−7.7−7.9−7.30.3Enhydriodon sp. Large otterAramis, Ethiopia1unknownunknown−7.9–––Enhydriodon omoensis n. sp. and Enhydriodon sp. Large otterOmo, Ethiopia (Members B&C)4unknownunknown−1.1−3.32.42.7HippopotamidaeOmo, Ethiopia (Members B&C)29Tc. 90%−4.1−7.42.82.1All mammals – hipposOmo, Ethiopia (Members B&C)306T<10% but variable−0.9−8.29.02.9Canis latrans Say, 1823 CoyoteCentral California, United States5T<5%−3.4−4.51.63.4Lynx rufus (Schreber, 1777) BobcatCentral California, United States4T<5%−1.8−3.1−0.11.2