What are these 'trapdoor spiders' spotted around San Diego?

Sometimes mistaken for small tarantulas, ‘trapdoor spiders’ are native to Southern California.

The Ten Creepiest Spiders of North America - Cool Green Science

Phylogenetic treatment and taxonomic revision of the trapdoor spider genus Aptostichus Simon (Araneae, Mygalomorphae, Euctenizidae)

Euctenizidae (Wafer-lid Trapdoor Spiders) in San Antonio , Texas United States

Bothriocyrtum californicum, California Trapdoor Spider, (C…

11 Black Spiders in Texas - A-Z Animals

Newly discovered trapdoor spider gets a name – Daily Democrat

New Spider Species Remind Us Just How Much We Don't Know About the Desert, Redefine

California trapdoor spider - Students, Britannica Kids

Spooky-looking 'trapdoor spiders' spotted around San Diego