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

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

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

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

California trapdoor spider, Bothriocyrtum californicum

Description of a new trapdoor spider species, Nemesia amicitia spec. nov., from southern Spain, and new information on Nemesia uncinata (Araneae: Mygalomorphae: Nemesiidae)

Ravine Trapdoor Spider: All You Need to Know in One Quick Guide - What's That Bug?

California trapdoor spider, Bothriocyrtum californicum

trapdoor spider

San Diego's changing bugs

A Male Trapdoor Spider from Austin, Texas - Bugs In The News

Texas Spiders: How Homeowners Can Protect Loved Ones

A molecular phylogeny of the Chinese Sinopoda spiders (Sparassidae, Heteropodinae): implications for taxonomy [PeerJ]

The Ten Creepiest Spiders of North America - Cool Green Science