As the name suggests, the Ummidia algarve Spider is a small spider that is endemic to the Algarve area. Although a very common spider, I have never stumbled across it’s unique burrow. Another name for the Ummidia species of spider is the Trapdoor Spider, it builds a close-able trap door on the entrance to the cylinder shaped burrow.
I took a walk today around the Quinta and found this burrow. (More information below image)