An update to the Iberian spider checklist (Araneae)

Area of Science:

• Zoology
• Biodiversity Research
• Arachnology

Background:

• A previous database cataloged spider (Araneae) distribution in the Iberian Peninsula up to 2010.
• Ongoing research is crucial for understanding biodiversity changes and conservation needs.

Purpose of the Study:

• To update the species distribution database for spiders (Araneae) in the Iberian Peninsula and Balearic Islands.
• To analyze changes in species richness, endemism, and sampling effort from 2010 to 2018.

Main Methods:

• Compilation of spider records from available literature and databases up to the end of 2018.
• Analysis of species distribution, richness, and endemism at national, family, and provincial levels.
• Comparison of data from the 2010 decade with previous records.

Main Results:

• A total of 30,834 records were compiled, representing 1,493 species (282 endemic) across 56 families and 402 genera.
• Species richness increased by approximately 14% since the previous database update.
• Significant regional variations in species richness and endemic richness were observed, with Illes Balears, Huesca, and Barcelona showing high record and species counts.

Conclusions:

• The updated database provides a comprehensive overview of spider diversity in the Iberian Peninsula.
• The findings highlight the dynamic nature of species distribution and the importance of continued monitoring.
• An online catalogue accompanies the checklist, facilitating access to detailed information for researchers and conservationists.