Post-rock veterans Tortoise [ tickets ] have lined up spring and summer headlining dates to support the group's first album of all-new studio material in five years.

The Chicago-based quintet kicks off a brief spring slate later this month with a May 29 show in Buffalo, NY. After subsequent appearances in Brooklyn (5/30) and New York City (5/31), the band takes some time off before launching a second tour leg July 11 in Los Angeles. The nine-city outing includes a July 17 appearance at Chicago's Pitchfork Music Festival. Details are included below.

"Beacons of Ancestorship," the band's first full-length album of new material since 2004's "It's All Around You," is due in stores June 23 on the Thrill Jockey label.

The band also released two albums in 2006, neither of them featuring new material. "The Brave and the Bold," the group's collaboration with singer/songwriter Will Oldham (credited under the nom de plume Bonnie "Prince" Billy) emerged in January of 2006 and "A Lazarus Taxon," a three-CD, one-DVD set that collects rare and archival material from various side-projects of the group's members over the years, followed in August.

In addition to their work with Tortoise, various members of the band also appear with several other acts, including Isotope 217, Brokeback, The Sea and Cake and Eleventh Dream Day.