A few species now in Vonones reach far northwards into the USA, were they occur in many of the southern states.
In 9/8, the Parthian nobility succeeded in putting their preferred king on the throne, but Vonones proved to have too tight a budgetary control, so he was usurped in favor of Artabanus II, who seems to have been a non-Arsacid Parthian nobleman.
He was the brother of Vonones (some of his coins explain he was "Brother of the king"), and probably identical with Spalahores.