Question: Ehnahre is a ensemble of a music subgenre that has developed since the early what?

Context paragraphs:
Flamenco rock: Flamenco rock or Andalusian rock is a rock music subgenre that emerged from (but is not limited to) the Spanish region of Andalusia throughout the late 1960s and early 1970s.  There were some precedents like a couple of albums ("Rock encounter (with Joe Beck)" and "The Soul of Flamenco and the Essence of Rock") by Sabicas, a couple of singles ("El garrotín / Tangos de Ketama" and "Ni recuerdo ni Olvido") by Smash, Gong, Galaxia, Flamenco or even the American band Carmen.  However, Triana was recognized as a pioneer of the genre since their music focuses on a complete fusion of the progressive rock and flamenco.  Many bands that mix progressive and symphonic rock with flamenco followed them such as Imán Califato independiente, Cai, Guadalquivir, Alameda or Mezquita; that's why the term "Andalusian rock" may be understood simply as flamenco prog.  Medina Azahara turned from progressive to a hard rock outfit in the 1980s and they remain as one of the most popular flamenco rock bands in its home nation.  Also other flamenco-influenced styles of rock emerged like the flamenco-folk band Veneno, flamenco-jazz-blues band Pata Negra among other bands that melted flamenco with African, reggae or Latin rhythms.

Shayning: Shay Hugi (born April 7, 1981), known professionally as Shayning, is an Israeli dubstep producer and disc jockey (DJ).  He is the founder of ElectroZilla Records and former drummer of Israeli death metal band Uranium.  His music incorporates triplet drum patterns with heavy metal influences and he is commonly regarded as pioneering Psystep music subgenre, his music is best known as a mixture between classic traditional Psychedelic trance and Dubstep.  He has released tracks under ElectroZilla Records, Ring Mode Records, Midijum Records

Ehnahre: Ehnahre is an experimental Extreme metal ensemble and contemporary composition collective based in Boston, Massachusetts.  Their music incorporates elements of Contemporary classical music, Aleatoric music, Doom metal, and Death metal, and utilizes extended techniques, aleatoric rhythms, aspects of Serialism, and elements from free improvisation, contemporary chamber music, and extreme metal styles.

Go-go: Go-go is a popular music subgenre associated with funk that originated in the Washington, D.C., area during the mid-60s to late-70s.  It remains primarily popular in the Washington metropolitan area as a uniquely regional music style.  A great number of bands contributed to the early evolution of the genre, but the Young Senators, Black Heat, and singer-guitarist Chuck Brown & the Soul Searchers are credited with having developed most of the hallmarks of the style.

Extreme metal: Extreme metal is a loosely defined umbrella term for a number of related heavy metal music subgenres that have developed since the early 1980s.  It has been defined as a "cluster of metal subgenres characterized by sonic, verbal and visual transgression".  The term usually refers to a more abrasive, harsher, underground, non-commercialized style or sound associated with the speed metal, thrash metal, death metal, black metal and doom metal genres.  With the exception of doom metal, all of these genres are characterized by fast tempos, attesting to their roots in hardcore punk, which has also fused with extreme metal in the forms of crossover thrash, crust punk, grindcore, sludge metal and metalcore.  Though many extreme sub-styles are not very well known to mainstream music fans, extreme metal has influenced an array of musical performers inside and outside heavy metal.

West Coast hip hop: West Coast hip hop is a hip hop music subgenre that encompasses any artists or music that originate in the West Coast region of the United States.  The gangsta rap subgenre of West Coast hip hop began to dominate from a radio play and sales standpoint during the early 1990s with the birth of G-funk and the emergence of Suge Knight and Dr. Dre's Death Row Records.

Rara tech: Rara tech is an electronic music subgenre that fuses the Afro-Haitian genre rara with house music.  Haitian-style electronic dance music (EDM) in Haiti is often referred to as "HEDM" (Haitian electronic dance music).  The origins of the genre and term was pioneered by Haitian artist, music producer, and DJ, Gardy Girault.

Florida breaks: Florida breaks, referred to as Florida breakbeat and Funky Breaks, is a genre of broken beat music which, as the name suggests, is most popular in the areas around the US state of Florida.  Its sound has a lot in common with UK nu skool breaks although it also contains influences of other music popular in the same area such as freestyle, electro and Miami bass due to the parallel electronic dance music subgenre of electro bass being billed at many of the same events as Florida breaks.  Also may be referred to as Orlando breaks, Tampa Breaks, or The Orlando Sound.  genre of breakbeat dance music that originated in central region of the State of Florida, United States.

Techdombe: Techdombe is an electronic music subgenre that fuses the Afro-Uruguayan genre Candombe with Techno music.  The term is gestated by Uruguayan multidisciplinary-artist, music producer, and DJ Javier Zugarramurdi García.  After many years of experimentation with the fusion of the genres, finally in 2015 Zugarramurdi releases a mini-album entitled "Techdombe" on his own independent label Repique, running under Bandcamp.  The label is focused on release modern electronic music based on Candombe grooves.  After giving birth to the subgenre Zugarramurdi is known as the originator of Techdombe.

Psychedelic pop: Psychedelic pop is a pop music subgenre in which musical characteristics associated with psychedelic music are applied to pop songs.  This includes "trippy" effects such as fuzz guitars, tape manipulation, sitars, backwards recording, and Beach Boys-style harmonies.  Blended with pop, they create melodic songs with tight song structures.  It reached its peak during the late 1960s, and declined rapidly in the early 1970s.

Supporting paragraphs: Ehnahre Extreme metal
Answer: 1980s