Complex sentence: California has chosen the Pleistocene saber-toothed cat, "Smilodon fatalis" familiar from the La Brea Tar Pits, and Alaska has the Woolly mammoth, "Mammuthus primigenius".
Split into simpler sentences: California has chosen the Pleistocene Sabertooth cat, "Smilodon fatalis" familiar from the La Brea Tar Pits. And Alaska has the Woolly mammoth, "Mammuthus primigenius".