Guerrero joins the Brazilian club from Ecuadorian outfit Liga de Quito while Penilla was ceded by Mexican side Pachuca, reports Xinhua news agency.
Both players have already been registered with the Brazilian Football Confederation and are free to play in Chapecoense's league match against Vitoria on Saturday.
Nineteen of Chapecoense's players and all of their coaching staff died in a plane crash in Colombia last November.
Having been forced to rebuild almost from scratch, the Verdao were eliminated from the Copa Libertadores -- South America's top club competition -- in the group stage in May.
They are currently 15th in Brazil's 20-team Serie A standings with five wins from 15 matches.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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