Laboratorio de Aracnología Facultad de Ciencias UNAM

Spider Inventories UPDATES!

NEW  All inventory websites have been rebuild with PYOINV 2.0 beta. The new pages will have the thumbnails 30% larger; if you don't see these changes, or receive a 'page not found' error, please reload the inventory website or wait for the specific times of each page to reload itself.

NEW   PYOINV 2.0 beta consolidates in one go all the individual steps that the user had to do, provides errors and log files for the standard views, and enormously simplifies the process of renaming taxa. A colleague and coauthor wrote this new program in Python. Please do not use any version of BIOINV.

The spider inventory for Pico de Orizaba Volcano is done. 294 species were documented with 4,078 standard views. The species ids are still a work in progress, help will be appreciated.

Los Tuxtlas inventory species number and names have been updated. Check the inventory welcome page for more details.


We have 8,986 images for approximately 700 species of Araneomorphae from Mexico. Please visit our spider inventory websites and enjoy!

Our laboratory studies the diversity and taxonomy of Araneomorphae spiders. The tools we use are species inventories documented online with high resolution images organized as standard views and the descriptions of those new species. These websites were created to compare undescribed taxa from different inventories. They also have been useful for identification of complicated taxa and the description of new species. With enough time we hope to provide the best online documentation of Mexican araneomorph spiders.

The Spider Inventory websites are aimed to specialist of Araneomorphae that already known this taxon to Family rank. The following books provide a good introduction to the biology of Araneae: Biology of Spiders 3ed (Foelix 2011), Spiders of North America an identification Manual 1st or 2nd edition (Ubick et al. 2005, 2017) and Spiders of the World: A Natural History (Platnick and Hormiga et al. 2020).

We hope that you find these data useful and thanks for your visit. Please cite this web site as follows:

  • Alvarez-Padilla F. 2012. Laboratorio de Aracnología. Facultad de Ciencias UNAM, online at {date of access}.

IMPORTANT All our pages are static html. Family menu pages have a cache life of one minute, comparative search menus of 20 minutes, and species pages of 10. Please wait this time if you do not see the updates you are looking for.


We would like to thank Uriel Garcilazo-Cruz for making the view of these pages adjustable to any screen size. Thanks also to Leonardo Sousa Carvalho for his valuable comments and the bugs he fund in BIOINV 1.0. We also would like to thank all the arachnologist that helped with the identification process and recognition of new species. They are mentioned in the respective species page. Special thanks to The George Washington University and The California Academy of Sciences (CAS). Funding was provided by UNAM-DGAPA-PAPIIT projects IN213612 and IN214916, CONACYT-SNI and Facultad de Ciencias UNAM.


All data included in are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The use of these data is limited for research, educational, non-commercial use as defined under the above CC License. Colleagues are welcome to use these material so long as the authors and the Facultad de Ciencias UNAM are cited as the source of the information. Users are NOT allowed to publish these data in any form without explicit permission from F. Alvarez-Padilla.

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