Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2013 Oct 7;280(1768):20131071. doi: 10.1098/rspb.2013.1071

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2013 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited.

PMC Copyright notice

Figure 4. — Spindle diagrams highlighting the bottleneck effect of the end-Permian extinction on diversity and disparity. The fine subdivisions of the stratigraphic time scale on the left represent time intervals t1–t8. In each diagram, the widths of the bars are drawn in dimension-less units and proportional to the number of taxa (left diagram) and to the mean disparity values (middle and right diagrams). (a) Diversity counts through time based on the number of taxa present in the phylogeny; (b) rarefied disparity through time using the median value of the sum of ranges and (c) rarefied disparity through time using the median value of the sum of variances.