Kim Shattuck, the frontwoman and guitarist for Southern California punk trio The Muffs who also played with ’80s rockers The Pandoras and took a brief turn as the Pixies’ post-Kim Deal bassist, died on Wednesday from complications of ALS, her family and bandmates announced. She was 56.

Just days after completing their first tour without original bassist Kim Deal, the resurgent Pixies apparently have decided to part ways with her touring replacement, Kim Shattuck of The Muffs, who took to both Facebook and Twitter tonight to announce she was “super disappointed to learn that my time with the Pixies ended today.”

The Pixies have been rehearsing for their upcoming tour with new bassist Kim Shattuck of The Muffs in Los Angeles this past week, so perhaps it’s no surprise the band headed out last night for a last-minute, surprise warm-up show at the Echo — where the band debuted six of their new songs.

The Pixies are now set to debut their new Kim Deal-less lineup at Chicago’s Riot Fest this September, joining a bill that includes The Replacements, Blondie, Violent Femmes, Mission of Burma, X, Dinosaur Jr and Peter Hook, among many others. The Pixies were added today alongside Joan Jett, TSOL and Suicidal Tendencies.

The Pixies today followed up last week’s free release of a surprise new track with more revelations, namely that the band is about to embark on a “massive global tour” to debut material off its follow-up to 1991’s Trompe le Monde with The Muffs frontwoman Kim Shattuck replacing the departed Kim Deal.