Question: The rock group Dartz! is what style of indie rock that emerged in the late 1980's in the United States?
Context: Indie rock is a genre of alternative rock that originated in the United States and the United Kingdom in the 1980s.  Originally "Indie" meant independent record labels and the music they produced.  "Indie" was often used interchangeably with "alternative" rock.  As grunge and punk revival bands in the US, and then Britpop bands in the UK, broke into the mainstream in the 1990s, indie identified those acts that retained an outsider and underground perspective.  In the 2000s, as a result of changes in the music industry and the growing importance of the Internet, some indie rock acts began to enjoy commercial success, leading to questions about its meaningfulness as a term. Dartz!  (often stylized as DARTZ!)  were a Math rock group from Middlesbrough in North East England (UK) who formed at the beginning of 2005.  They are signed to Xtra Mile Recordings in the UK and Deep Elm in the US, and released one full-length album, one mini-album, three singles and a split 7" via Xtra Mile - as well as an EP on Sunderland based DIY micro-label Fakedream Records, and a split 10" with Scottish band Stapleton on Gravity DIP. Easterhouse was a British indie rock group from the mid to late 1980s, known for jangly guitars and leftist political leaning. Garage punk is a rock music fusion genre combining punk rock and garage rock that took shape in the indie rock underground between the late 1980s and early 1990s.  Bands drew heavily from stripped-down 1970s punk rock and Detroit proto-punk, and incorporated numerous other styles into their approach, such as power pop, 1960s girl groups and garage rock, hardcore punk, early blues and R&B, and surf rock. The Shaky Hands were a Portland, Oregon-based rock group, formed in 2003 by musician Paul Culp, of "Lonesome Radio Heart" and Colin Anderson.  Nicholas Delffs joined soon after on vocals and guitar.  They spent the next three years gradually building a following in the Portland area and self-releasing two CDs, one informally called "The Skidmore Days", which is a lo-fi full-length album recorded in future guitarist Jeff Lehman's North Portland basement and mixed by Alex Arrowsmith.  They also released a self-titled EP informally referred to as the "Bonnie Doon EP", in reference to the location it was recorded.  The Shaky Hands were signed to Holocene Music in late 2006.  By this time, the lineup had changed considerably, with Mayhaw Hoons replacing Culp (who left in late 2004) on bass and the addition of second guitarist Jeff Lehman.  Nathan Delffs (Nicholas' brother, and member of The Castanets) joined shortly thereafter on percussion and lap steel.  Their sound is a fusion of 1960s style British Invasion bands such as The Kinks, The Who and The Zombies and American folk-rock in the vein of Neil Young.  The result is what many have described as a loose, jangly, rootsy style of indie rock.  The Delffs brothers (along with most of the members of Shaky Hands) also perform Shaky Hands songs (alongside original compositions) under the Death Songs moniker, a more experimental and folk-oriented side project. Indie pop (also typeset as indie-pop or indiepop) is a music genre and subculture that combines guitar pop with DIY ethic in opposition to the style and tone of mainstream pop music.  It originated from British post-punk in the late 1970s and subsequently generated a thriving fanzine, label, and club and gig circuit.  The style, a counterpart of indie rock, differs to the extent that it is more melodic, less abrasive, and relatively angst-free than other indie rock.  In later years, the definition of "indie pop" has bifurcated to also mean bands from unrelated DIY scenes/movements with pop leanings.  Subgenres include chamber pop and twee pop. Math rock is a style of indie rock that emerged in the late 1980s in the United States, influenced by post-hardcore, progressive rock bands such as King Crimson and 20th century minimal music composers such as Steve Reich.  Math rock is characterized by complex, atypical rhythmic structures (including irregular stopping and starting), counterpoint, odd time signatures, angular melodies, and extended, often dissonant, chords.  It bears similarities to post-rock. This is a list of rock music genres consisting of subgenres of popular music that have roots in 1940s' and 1950s' rock and roll, and which developed into a distinct identity as rock music in the 1960s, particularly in the United Kingdom and the United States.  By the late 1960s, a number of identifiable rock music subgenres had emerged, including hybrids like blues rock, folk rock, country rock, and jazz-rock fusion, many of which contributed to the development of psychedelic rock influenced by the counter-cultural psychedelic scene.  New genres that emerged from this scene included progressive rock, which extended the artistic elements; glam rock, which highlighted showmanship and visual style; and the diverse and enduring major subgenre of heavy metal, which emphasized volume, power, and speed.  In the second half of the 1970s, punk rock both intensified and reacted against some of these trends to produce a raw, energetic form of music characterized by overt political and social critiques.  Punk was an influence into the 1980s on the subsequent development of other subgenres, including new wave, post-punk and eventually the alternative rock movement.  From the 1990s alternative rock began to dominate rock music and break through into the mainstream in the form of grunge, Britpop, and indie rock.  Further fusion subgenres have since emerged as well as conscious attempts to revisit rock's history. Emo is a genre of rock music characterized by an emphasis on emotional expression, sometimes through confessional lyrics.  It emerged as a style of post-hardcore from the mid-1980s hardcore punk movement of Washington, D.C., where it was known as emotional hardcore or emocore and pioneered by Washington, D.C. hardcore bands such as Rites of Spring and Embrace.  However, as the genre was taken up by a new generation of musicians in the early 1990s, its sound and meaning shifted and changed and it was reinvented as a style of indie rock and pop punk by bands such as Jawbreaker, Sunny Day Real Estate, Weezer, and Jimmy Eat World.  By the mid-1990s, numerous emo acts such as Braid, The Promise Ring, and the Get Up Kids emerged in the Midwestern and Central United States, and several independent record labels began to specialize in the genre.  Meanwhile, a more aggressive style of emo, screamo, had also emerged, pioneered by the San Diego bands Heroin and Antioch Arrow. Shoegazing (also known as shoegaze) is a subgenre of indie rock, alternative rock, and neo-psychedelia that emerged in the United Kingdom in the late 1980s.  The style is typified by the blurring of component musical parts—typically significant guitar distortion, feedback and obscured vocals—into indistinguishable mixtures of sound.
Answer: Math rock