Question: are David Donato and Cedric Bixler-Zavala in the same band

Context articles: Los Dregtones
Cedric Bixler-Zavala
Zavalaz
David Donato
Triclops!
Antemasque (band)
De Facto (band)
De-Loused in the Comatorium
The Mars Volta
El Grupo Nuevo de Omar Rodriguez Lopez

Los Dregtones was a band from El Paso, Texas, led by Cedric Bixler-Zavala (vocals/drums), Ralph Jasso (guitar) and Jimmy Hernandez (bass).
 The line-up changed multiple times with Julio Venegas playing bass for a long duration while Hernandez was off at music school at the Atlanta Institute of Music in Atlanta, GA.
 Other members included Luis Prieto (Percussion), Brooks Miller (trumpet), Adam Young (drums), and Andrew McCoi (drums).
 In 1994, they released a demo recorded at Rosewood Studios by Mike Majors (produced by Sparta), titled "Five Song Alibi".
 The style of the album was not unlike what lead singer Cedric Bixler would later perform with The Mars Volta; psychedelic rock, with hints of salsa, reggae, and occasional Led Zeppelin-esque guitar riffs, with punk rock.
 The cover and insert art was drawn by Julio Venegas, which features a six armed serpent women with a third eye and long ugly hair, and a symbol on the end of its tail that would later be used by Cedric and Omar Rodríguez-López on The Mars Volta's stickers, shirts, and other merchandise.
 Guitarist Ralph Jasso would later play bass briefly for The Mars Volta.
Cedric Bixler-Zavala (born November 4, 1974 in Redwood City, California) is a Grammy Award-winning American musician known for his work as frontman and lyricist of the progressive rock band The Mars Volta, and as frontman and occasional guitarist of the post-hardcore group At the Drive-In.
 Currently he is a singer in the band Antemasque, and also sings and plays guitar in his band Zavalaz.
 He has also played drums for a number of acts, including the dub act De Facto and more recently Big Sir and Anywhere.
Zavalaz is an American rock band from Los Angeles, California, formed in 2013.
 It features singer/guitarist Cedric Bixler-Zavala, guitarist Dan Elkan, bassist Juan Alderete and drummer Gregory Rogove.
David Tom Donato is an American singer known for his involvement in Black Sabbath.
 He recorded several demos with the band and rehearsed throughout 1984 and 1985.
 Contrary to reports, Donato was not fired after an interview with "Kerrang!
" magazine as many have falsely reported.
 The band fell apart soon thereafter, with Tony Iommi forming an entirely new Black Sabbath the following year.
Triclops!
 was a San Francisco and Oakland-based Acid Punk/progressive rock band formed in 2005.
 They released two full-length albums, a 7" picture disc single, and an EP on noted independent record labels Gold Standard Laboratories, Alternative Tentacles, and Sick Room Records.
 Triclops!
 includes members of noted bay area bands Victim's Family, Fleshies, Bottles and Skulls, and Lower Forty-Eight.
 The band went on hiatus in 2010 following the release of their second full-length "Helpers On The Other Side", with the members remaining busy in their older bands and new projects.
 Triclops!
 guitarist Christian Eric Beaulieu's current project is as the primary songwriter for Los Angeles-based band Anywhere, which also features progressive punk luminaries Mike Watt and Cedric Bixler-Zavala.
Antemasque (stylized as ANTEMASQUE) is an American rock band formed in 2014 by former members of At the Drive-In and The Mars Volta, Omar Rodríguez-López and Cedric Bixler-Zavala.
 Their first album featured Red Hot Chili Peppers's Flea on bass and Dave Elitch on drums.
 Both Flea and Elitch had previously played with The Mars Volta.
 Omar's brother Marfred Rodríguez-López (formerly of Zechs Marquise) eventually joined as a permanent bassist with Blink-182 member Travis Barker taking over drumming duties.
De Facto was a dub reggae band which included Cedric Bixler-Zavala, Omar Rodríguez-López, Isaiah "Ikey" Owens and Jeremy Michael Ward.
De-Loused in the Comatorium is the debut studio album by American progressive rock band The Mars Volta, released on June 24, 2003, on Gold Standard Laboratories and Universal Records.
 Based on a short story written by lead singer Cedric Bixler-Zavala and sound manipulation artist Jeremy Michael Ward, the concept album is an hour-long tale of Cerpin Taxt, a man who enters a week-long coma after overdosing on a mixture of morphine and rat poison.
 The story of Cerpin Taxt alludes to the death of El Paso, Texas artist—and Bixler-Zavala's friend—Julio Venegas (1972–1996).
The Mars Volta was an American rock band from El Paso, Texas, formed in 2001.
 The band's final lineup consisted of Omar Rodríguez-López (guitar, producer, direction), Cedric Bixler-Zavala (vocals, lyrics), Juan Alderete (bass), Marcel Rodríguez-López (keyboards, percussion) and Deantoni Parks (drums).
 The band formed following the break-up of Rodríguez-López and Bixler-Zavala's previous band, At the Drive-In.
 They are known for their energetic live shows and their concept albums.
El Grupo Nuevo de Omar Rodriguez Lopez is a band consisting of Omar Rodriguez Lopez (guitar), Cedric Bixler-Zavala (vocals), Juan Alderete de la Peña (bass guitar), Jonathan Hischke (synth bass) and Zach Hill (drums).