While most people are concerned about the black widows, the white widow is also fairly venomous. It is also called the white steppe spider or белый каракурт (in Russian). Its scientific name is latrodectus pallidus.
Where is it?
how poisonous is it
Being a rare or pretty does not mean this thing is not venomous. This spider has an LD of .014 mg /kg which is only 7 times less than its cousin the black widow (.002 mg/kg) making it one to avoid.