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Sphenacris crassicornis Ichthyotettix mexicanus Sphenarium sp. Orth184 Oax9 Sphenarium sp. Orth183 Oax9 Sphenarium sp. Orth205 Gro9 Sphenarium sp. Orth203 Gro9 Sphenarium sp. Orth69 Gro6 Sphenarium sp. Orth71 Gro6 Sphenarium sp. Orth47 Oax2 Sphenarium sp. Orth78 Oax2 Sphenarium histrio Sphenarium mexicanum mexicanum Sphenarium sp. Orth206 Gro7 Sphenarium sp. Orth182 Gro7 Sphenarium sp. Orth108 Gro3 Sphenarium sp. Orth107 Gro3 Sphenarium sp. Orth33 Gro2 Sphenarium sp. Orth32 Gro2 Sphenarium macrophallicum Sphenarium sp. Orth186 Gro8 Sphenarium sp. Orth26 Gro1 Sphenarium sp. Orth139 Gro4 Sphenarium sp. Orth140 Gro4 Sphenarium sp. Orth60 Gro4 Sphenarium rugosum Sphenarium purpurascens Sphenarium minimum Sphenarium borrei
0 4.13 8 12 17 Time (MYA)
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