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174:Eocene–Oligocene extinction event
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117:Oligocene species extinctions
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100:Oligocene genus extinctions
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437:Paleogene extinctions
141:Rupelian extinctions
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427:Oligocene events
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279:Groeberiidae
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145:(3 C, 14 P)
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28:during the
421:Categories
384:Pyrotheria
379:Pseudhyrax
308:Leptictida
296:Hoploparia
252:Eosimiidae
191:Anagalidae
80:(1 C, 8 P)
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320:Miohippus
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