Mammoth construction of the Great Pyramid of ancient Egypt. The earliest known proboscideans, the clade that contains the elephants, existed about 55 million years ago around the Tethys Sea area. The closest relatives of the Proboscidea are the sirenians and the hyraxes. The family Elephantidae is known to have existed six million years ago in Africa, and includes the living elephants and the mammoths. Among many now extinct clades, the mastodon is only a distant relative of the mammoths, and part of the separate Mammutidae family, which diverged 25 million years before the mammoths evolved. The following cladogram shows the placement
Mastodon (band) as downloadable content for "Rock Band 3", with Pro Guitar support also available at extra cost. "Leviathan" was followed by the 2006 release of "Call of the Mastodon", a remastered collection of the band's first nine songs, and a DVD of interviews and concert footage called "The Workhorse Chronicles" that includes material from the band's early days as a five-piece. The band has stated that ""Call of the Mastodon"" is their third studio album even though the album is a compilation album. These two releases were the band's last for Relapse Records, as they would later go on to sign