Cyber-Raxacoricofallapatorian

In an alternate timeline shown to Jean-Luc Picard by the Eleventh Doctor, Cybermen were converted from the inhabitants of Raxacoricofallapatorius by 2448. This timeline, a combination of N-Space and the Federation universe, was averted when the Doctor and Picard stopped the Cybermen before they could conquer the Borg Collective in 2368. (COMIC: Assimilation²)

In the original timeline, the Cybermen counted the Slitheen among their opponents. (PROSE: Ghost in the Machine)

Characteristics
The cyber-converted Raxacoricofallapatorians were externally similar to the Cybermen responsible for their conversion; (COMIC: Assimilation²) resembling those made by Cybus Industries in Pete's World, these Cybermen of N-Space were associated with the Cyber Legions. (TV: Rise of the Cybermen, A Good Man Goes to War)

Notably, the Raxacoricofallapatorian Cybermen were distinguished from other Cybermen by their larger Cyber-suits which matched the Raxacoricofallapatorian body. Sporting bulbous Cyber-helmets matching the Raxacoricofallapatorian head, the converted Raxacoricofallapatorian's three-clawed arms were augmented into distinctive Cyber-arms. (COMIC: Assimilation²)

Behind the scenes

 * The concept of cyber-converted Raxacoricofallapatorians previously received a humorous contemplation in the form of the "Cyber-Slitheen" in the thirteenth issue of the Doctor Who Adventures magazine.
 * Cybermen found on Telos also sported arms with three fingers. (TV: The Moonbase, The Tomb of the Cybermen)