Pixies have a new bass player — and this one’s not named Kim. The Bay State-bred band, whose US tour stops at the Orpheum Jan. 18, has hired Paz Lenchantin to take over for the departed Kim Shattuck, who had taken over for the departed Kim Deal. Lenchantin’s resume includes stints with A Perfect Circle, Zwan, and the Entrance Band. According to a statement released by the band Monday, Lenchantin is Pixies’ “touring bassist,’’ suggesting that perhaps she shouldn’t make any longterm plans. Last fall, Pixies released “EP-1,’’ the first of what the band says will be several mini-albums.