Laboratorio de Aracnología   Facultad de Ciencias UNAM

Spider Biodiversity Inventory Website Protocol

This protocol objective is to make inventory web sites almost automatically. It standardizes the acquisition of digital images to directly create web pages by combining data from three sources: the image file names, the species folder organization, and a table with taxonomic data for these species or morphospecies.

It uses a MS-DOS batch file that coordinates two scripts written in Perl that transform these data into a format that Excel formulas read and incorporate the html code. The last and third script uses the result of the Excel formulas to make the species individual pages and their access menus. Pages not done automatically are the Welcome page for the inventory and two more html files for website control.

The steps for this protocol will be published soon. Its software is available and the User Manual the main reference to make inventory websites. Please use it and cite our paper when published for your work.

Please click on this link "" to download all scripts, Excel templates, control pages and the User Manual.

Applying standardized collecting protocols is crucial for inventories comparisons. Over the years the spider community have used the same collecting protocol with some minor variations. At its core, it basically consist in using the same unit of collecting effort for direct techniques (1 hour/person), and trace areas (of the size that fits you better) instead of transects. One hectare has been used as the standard plot area. If indirect methods are used, please give explicit measurements for the substrate sampled, for example, volume of sifted leaf litter with an approximate volume of ground substrate processed.

Finally remember that collecting all spider species in an area is impossible, therefore extrapolations and statistical tools are needed to measure inventory completeness. Not making explicit these units of effort and area will isolate your inventory from meaningful comparisons.

Please send your comments and species identifications to this email:


We would like to thank all the arachnologist that helped with the identification process and recognition of new species, mentioned in each species page. Also thanks to my dear friend Sylvio Drouin for his help in setting up this website. These images for the Xilitla inventory were obtained in my laboratory and with the kind collaboration of Gustavo Hormiga's and Charles Griswold's labs. Special thanks to The George Washington University and The California Academy of Sciences (CAS) for sharing the equipment. Funding was provided by UNAM-DGAPA-PAPIIT projects IN213612 and IN214916, CONACYT-SNI and Facultad de Ciencias UNAM.


Our biodiversity pages can be searched in two ways Comparative Search and by Inventory. Select one of these options in the "Biodiversity Inventory Pages" menu and follow the instructions.

In any search mode select a taxon from the Family menu to show the included species names. To enter the species pages just click on any name. Click in the thumbnails to access the high resolution images that will pop-up on separate resizable windows. This was done with the purpose of comparing images side by side after organizing them on the desktop.

If you retrieved an individual species page from Google Search under a genus or species name, the link found under the species name will redirect you this web page. Then you can search using any mode described above.

Finally all web pages have a cache life of ten minutes, if you do not see the updates you are looking for, please refresh the page or wait until ask for an update.

Copyright       Creative Commons License

Araneomorphae of Mexico by is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Based on a work at Use of this Website is limited for research, educational, non-commercial use as defined under Creative Commons License. Colleagues are welcome to use this catalog for their individual research so long as the author and the Facultad de Ciencias, UNAM are cited as described below.

  • Alvarez-Padilla Laboratory 2019. Biodiversity of Araneomorphae from Mexico. Facultad de Ciencias UNAM. Online at:

Users are NOT allowed to publish these images in any form without explicit permission from the copyright holders.