This article's subject lies mainly within the Archie Sonic Comics continuity. Bear in mind that the information may not be canonical to the storyline of the Sonic games.
The Lost Tribe of Echidnas is a group of remaining echidnas. They are the descendants of the tribe of Tikal and
Chief Pachamahamic (from Sonic Adventure) and they appear various times throughout the Knuckles the Echidna series, especially in the Knux vs Kragok comics. They were led by Knuckles' great grandfather Athair, but he left the tribe to find new leaders. The lost tribe come from the lost city of Albion, and reappeared in the "Return to Angel Island" series in Sonic the Hedgehog comics #138 - 142, and they have mistaken Knuckles as their avatar, the one that will stop the dingoes from torturing the echidnas. Constable Remington happens to be with them, right after Eggman destroyed Echidnaopolis for Dingo City. At this specific series, they did not have a current leader.