This murine rodent was collected in the mountains of New Guinea. Specimens in the revision have bright tawny to orange-brown upperparts and whitish gray underparts. The records are from lower to mid-montane forest; the account reports no upper-montane or alpine records.
Specimens have bright tawny to orange-brown upperparts, gray fur between the eyes, tawny cheeks, and whitish gray underparts.
Records included in the revision are from lower to mid-montane forest. The account includes no upper-montane or alpine records for C. kirrhos.
An extinction-risk assessment has not been added yet.