sw. US (CA-TX) & Mexico (Baja California, Sonora, Chihuahua)(1)
(most records from Pima, Santa Cruz, and Cochise counties; also known from Maricopa Co.)
The green pods of Mesquite (Prosopis spp.), notably the non-native P. velutina (Chilean, Velvet Mesquite) and the native P. glandulosa (Honey Mesquite)
Eggs are posited in chains of ~12 under stems, or loose bark, of host plants.
T. acutangulus is a Mesoamerican sp. (Mexico to Costa Rica) whose US records were based on misidentifications (Brailovsky et al. 1994)
T. neocalifornicus is the only representative of the genus north of Mexico; it's close to T. gigas (Mexico) and T. acutangulus
Brailovsky H., Schaefer C.W., Barrera E., Packauskas R.J. (1994; published 1995) A revision of the genus Thasus (Hemiptera: Coreidae: Coreinae: Nematopodini). Journal of the New York Entomological Society 102: 318-343.
Forbes G., Schaefer C.W. (2003) Further notes on the genus Thasus (Hemiptera: Heteroptera: Coreidae). Journal of the New York Entomological Society 111: 235- 241.
Jones W.A. (1993) New host and habitat associations for some Arizona Pentatomoidea and Coreidae. Southwestern Entomologist (Suppl.) 16: 1-29.