Classification of the genus Ectocion

G. †Ectocion Cope 1882
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†Ectocion cedrus Thewissen 1990
†Ectocion collinus Russell 1929
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Invalid names: Gidleyina montanensis Gidley 1935 [synonym], Gidleyina silberlingi Gidley 1935 [synonym], Gidleyina wyomingensis Gazin 1956 [synonym], Meniscotherium semicingulatum Russell 1929 [synonym], Tetraclaenodon superior Simpson 1935 [synonym]
†Ectocion ignotum Novacek et al. 1991
†Ectocion major Patterson and West 1973
†Ectocion mediotuber Thewissen 1990
†Ectocion nanabeensis Beard and Dawson 2009
†Ectocion osbornianus Cope 1882
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Invalid names: Ectocion ralstonensis Granger 1915 [synonym]
†Ectocion parvus Granger 1915
†Ectocion superstes Granger 1915
Invalid names: Gidleyina Simpson 1935 [synonym], Prosthecion Patterson and West 1973 [synonym]