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

. 2021 Jun 3;4:668. doi: 10.1038/s42003-021-02173-3

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

© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Fig. 1 — The divergence time was estimated based on a maximum likelihood phylogenomic tree of 16 Arachnida species and three fossil calibrations. All nodes have 100% support according to 1,000 bootstraps. The estimated divergence times are displayed with 95% confidence intervals (in square brackets). Blood-sucking species in red; fat-feeding species in olive; herbivorous species in green; predatory species in blue; and others/transitional in orange. The same colour theme is used in the other figures. The numbers to the right of the species indicate the records of gene family expansions and contractions, with red for expansions and blue for contractions.