Parasteatoda tepidariorum is a small, pea-sized spider, which is commonly found in and around homes and other buildings.
Nomenclature
Formerly called Achaearanea tepidariorum
Bites
Bites are not hazardous to humans though they may be painful.
Toxins
Young et al 1984 partially characterized a toxin which may block neurotransmitter release at the cockroach cercal nerve / giant fiber junction.
Young, E. F., D. W. Martin, et al. (1984). "Neurotoxic action of the venom of the common American house spider." Physiological Zoology 57(5): 521-529.