Temnothorax arbustus Prebus, 2021b: 49 (in key), 98, figs. 95B, 97 (w.) MEXICO (Baja California Sur). Neotropic.

Primary type information: Type-material: holotype worker. Type-locality: Mexico: Baja California Sur: 14 km NE Hwy 19 turnoff to Presa Santa Inez, 23.590000 N 110.091667 W, 385 m, 21.iii.2014, dry forest with Bursera, Jatropha, Quercus, Pachycereus, organpipe, 5 cm dead branch Bursera, #5277 (R.A. Johnson). Type-depository: CASC. Type-specimen: CASENT0758357. Secondary type information: Paratype-material: 3 paratype workers. Paratype-locality: same as for holotype. Paratype-depositories and specimens: UCDC: CASENT0733967; UNAM: CASENT0869068.