Acephali

n. legendary people who were said to have no heads; Christian sect without a leader

"Acephali" (from the Greek language a-, "without," and kephale, "head") is a term applied to several sects as having no head or leader; and in particular to a strict monophysite sect that separated itself, in the end of the 5th century, from the rule of Peter Mongus, the patriarch of Alexandria, and remained "without king or bishop" till they were reconciled by Mark II (799 - 819).
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(n. pl.)
Bishops and certain clergymen not under regular diocesan control.
  

(n. pl.)
A fabulous people reported by ancient writers to have heads.
  

(n. pl.)
A class of levelers in the time of K. Henry I.
  

(n. pl.)
A Christian sect without a leader.
  

[Other] The Acephali are a race of beings from Libya, whose heads are either removable or lie in their chests. In the beginning, they were normal but had an altercation with their gods that resulted in them being decapitated. The ones with the removable heads usually carry them in their arms. They are described by Herodotus and Josephus.

ACEFALI