EPTO database

Global occurrences of Ephemeroptera, Plecoptera, Trichoptera, Odonata

Lestes sponsa (Hansemann, 1823) (© S. Domisch)

Our EPTO data paper has been published in Global Ecology and Biogeography ! Many thanks again to all co-authors and data providers for putting this together!

» Click here to read the publication «

» Click here to download the data «

» Click here for the visualization «

Global biodiversity is declining rapidly worldwide, and among terrestrial, marine and freshwater ecosystems, freshwaters are particularly vulnerable. These fragmented ecosystems cover less than 1% of the Earth’s surface, yet they harbour approximately 10% of all described species. Aquatic insects contribute to freshwater diversity by approximately 60% as the largest and most diverse taxa group, and given this substantial proportion, aquatic insects may be considered as a proxy for freshwater biodiversity and ecological state of a given habitat.


We have collated, together with nearly 100 co-authors, a global database of Ephemeroptera, Plecoptera, Trichoptera and Odonata (EPTO) occurrences comprising more than 8 million records. The data can be downloaded here and visualized here.

The following map shows the number of occurrences and genera per site (click here for the fullscreen interactive map):

CC BY-NC 4.0


This map shows the density of records globally (click here for the fullscreen interactive map):

CC BY-NC 4.0

Map of observation records per basin (click here for the fullscreen interactive map):

CC BY-NC 4.0


Map showing the number of genera per basin (click here for the fullscreen interactive map):

CC BY-NC 4.0



Dr. Sami Domisch
Dr. Sami Domisch
Leibniz Junior Research Group Leader