Dryopithecus pattern is the characteristic feature of:
In a mandibular first molar mesiolingual cusp joins the distobuccal cusp along the floor of the central fossa, this is known as dryopethicus pattern.
Permanent mandibular 1st molar.
Permanent mandibular 3rd molar.
Permanent maxillary 2nd molar.
Permanent maxillary canine.