The earliest tetrapods, called basal or stem tetrapods, such as the species Acanthostega, are more primitive than the common ancestor of all tetrapods alive today, and so do not fall into any of the main tetrapod groups. There are only a few dozen species in this classification, and they are all long extinct.Aside from the basal tetrapods, there are three major groups of tetrapods: amphibians, synapsids (meaning fused arch, mammals are the only synapsids alive today), and sauropsids (meaning lizard face).he earliest tetrapods, called basal or stem tetrapods, such as the species Acanthostega, are more primitive than the common ancestor of all tetrapods alive today, and so do not fall into any of the main tetrapod groups. There are only a few dozen species in this classification, and they are all long extinct.
Colonel Sam Flagg. The Colonel Samuel Flagg character is a careful CIA Agent whose area of assignment includes the 4077th MASH unit on the CBS television series M*A*S*H, played by actor Edward Winter. Col. Flagg is a U.S. Military Intelligence agent.
To edit the credits displayed or to add more credits to this character's filmography, click the Edit Credits link.  1 M*A*S*H. - Germ Warfare (1972) TV episode, Played by Timothy Brown. 2  MASH (1970) Played by Fred Williamson (as Dr. Oliver 'Spearchucker' Jones) ...