Assertion: extinction | /r/CapableOf | reduce the number of different genera
Facets:
value: significantly
type: MANNER
value: by 12 to 70 percent
type: OTHER
Source sentences:
text: Using the maximum number of different genera in the middle part of the Guadalupian Epoch (about 272.3 million to 259.8 million years ago) as a benchmark, extinction within marine invertebrate faunas significantly reduced the number of different genera by 12 to 70 percent by the beginning of the Capitanian Age some 266 million years ago.