Upsilon Acrux first appeared on record on a 1998 compilation entitled Trummerflora 2.[1] Soon after they contributed a song to a compilation entitled Before the Pirates Came.[2] They went from a 4 piece to a 3 piece before releasing 2002's Last Train Out.[3] They expanded to a five-piece, including two drummers for Volucris Avis Dirae-Arum in 2004. By 2005 they had done away with the dual-drummer setup, and signed with Cuneiform Records later in the year.[4] 2007 saw the release of their first album for Cuneiform, Galapagos Momentum.[5] They released their sixth full-length album, entitled Radian Futura, on May 19, 2009.[6] In 2015, on April 14, they released a new album called Sun Square Dialect.
The lineup of Applehans, Kiersnowski (the King), Lai and Miller (Ice) performed for two years, recording Galapagos Momentum in 2006. Before the recording was pressed, a new incarnation was assembled with Cobb (McEnroe, Bart Garfunkel),[7] Lai, Meszler (Mezz, Meszloforte), Moeggenberg (Moeggen) and Sataman (Martron, Marty-Party) in March 2007. This new lineup promoted Galapagos throughout the U.S. in summer 2007. The album was critically acclaimed,[8] earning a number 2 position on Organ Magazine's end of the year album list.[9] The group would share stages with The Locust, Qui, Tatsuya Yoshida, Polar Goldie Cats, The Mae Shi, Ancestors, HEALTH, Abe Vigoda, Weasel Walter, and Cheer-Accident.
In December 2007, Upsilon began work on their magnum opus, "Transparent Seas (Radio Edit)". On June 6, 2008, the song was premiered at Cafe Mariposa in Echo Park, CA.[10]
On September 18, 2009, Upsilon performed for a crowd of over 400 at the Gertje Fest 5 at the Landbouwebelang in Maastricht.[15]
Upon the group's return from its European tour, Upsilon Acrux performed a 70-minute set at The Smell. The concert was professionally mixed and recorded.[16]