Classification of the genus Oryctocephalus
G. †Oryctocephalus Walcott 1886
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†Oryctocephalus americanus Sundberg and McCollum 2003
†Oryctocephalus elongatus Zhao et al. 1997
†Oryctocephalus incurvus Lu and Chien 1974
†Oryctocephalus indicus Reed 1910
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Invalid names: Oryctocephalus kobayashii Saito 1934 [objective synonym]
†Oryctocephalus lancastrioides Shergold 1969
†Oryctocephalus maladensis Resser 1939
†Oryctocephalus nyensis Palmer and Halley 1979
†Oryctocephalus orientalis Saito 1934
†Oryctocephalus primus Walcott 1886
†Oryctocephalus reticulatus Lermontova 1940
†Oryctocephalus reynoldsiformis Lermontova 1940