Unlabeled

Kinds of sea animals in the fossil record, 529 to 12 million years ago

The largest drop came about 252 million years ago, at the end of the Permian: from 1,608 genera to 650. The notch at 66 million is the end of the Cretaceous, when the dinosaurs died out.

What does this axis measure?
What does this axis measure?
Kinds of sea animals in the fossil record, 529 to 12 million years ago: 40 points, a line chart.
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Kinds of sea animals (genera)
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Time before today (million years)
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The data: 40 points
Time before today (million years)Kinds of sea animals (genera)
11.633,390
33.92,839
41.032,815
562,088
661,654
72.22,041
83.61,999
113.21,662
121.41,510
143.11,424
154.81,483
165.31,324
174.71,056
192.91,028
201.4812
227.31,171
2371,120
247745
251.902650
264.281,608
274.41,740
290.11,579
298.91,335
323.41,102
330.31,161
346.71,052
358.86870
372.15962
382.311,145
393.471,482
410.621,532
419.621,212
432.91,315
443.11,002
452.81,516
458.21,278
477.1710
486.85327
506.5398
529105
Source
Paleobiology Database, download of October 5, 2026: animal genera found in marine rocks, by ten-million-year bin; genera crossing each bin boundary calculated by Unlabeled
Licence
CC BY 4.0
Read
2026-10-05
Drawn
40 points as the puzzle showed them · line
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