TABLE 6 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 6. — Tooth enamel δ13C values for extant and fossil otters and extant terrestrial carnivorans suggesting an omnivorous, perhaps opportunistic diet for Enhydriodon omoensis n. sp. Extant carnivoran data from Clementz & Koch (2001) and Tejada et al. (2020) (for Pteronura brasiliensis Zimmermann, 1780). Those data are corrected from the extant (–7.8‰) to Plio-Pleistocene (3.4 to 2.5 Ma) δ13Catm value of −6.3‰ based on assumed extant sampling in the 1990s for comparison to the Omo samples (Francey et al. 1999; Tipple et al. 2010). Data for Aramis fossil Enhydriodon Falconer, 1868 from White et al. (2009). Abbreviations: E, estuary; FW, freshwater; KB, kelp bed; T, terrestrial. Most common diet of extant carnivorans from Bekoff (1977), Estes (1980), Larivière & Walton (1997, 1998), Noonan et al. (2017), and the Washington Department of Fish and Wildlife for the Washington population of Lontra canadensis (Schreber, 1777) (https://wdfw.wa.gov/). δ 13 C_corrSpeciesLocalitynFeeding zone DietmeanminmaxSDEnhydra lutris (Linnaeus, 1758) Sea otterCentral California, United States5KBSea urchins, bivalves, rock crabs–4.6–5.6–3.70.9Lontra canadensis (Schreber, 1777) River otterWashington, United States10EFish–6.6–14.4–4.53Lontra canadensis River otterOregon, United States7FWFish, frogs, crayfish–15.8–20.0–10.04.3Pteronura brasiliensis Zimmermann, 1780 Giant otterMaynas, Peru6FWFish–19.9–21.1–17.81.3Enhydriodon sp. Large otterAramis, Ethiopia1unknownunknown–8.2–––Enhydriodon omoensis n. sp. andOmo, Ethiopia4unknownunknown–7.0–9.7–4.72.1Enhydriodon sp. Large otterCanis latrans Say, 1823 CoyoteCentral California, United States5TOmnivore–12.0–13.0–10.63.4Lynx rufus (Schreber, 1777) BobcatCentral California, United States4TLagomorphs, rodents–10.3–15.7–7.51.7