in taxon develops from develops from composed primarily of Mammalia auditory ossicle bone malleus bone malleus anguloarticular - malleus GAID:867 SCTID:264090005 MA:0001216 FMA:52753 Wikipedia:Malleus NCIT:C33051 UBERON:0001689 EMAPA:18584 MESH:D008307 The malleus or hammer is a hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum. The word is Latin for hammer. It transmits the sound vibrations from the eardrum to the incus. The malleus is unique to mammals, and evolved from a lower jaw bone in basal amniotes called the articular, which still forms part of the jaw joint in reptiles. Embryologically it is derived from the first pharyngeal arch along with the rest of the bones of mastication, such as the maxilla and mandible. [WP,unvetted]. bone tissue endochondral bone Meckel's cartilage malleus cartilage element neural crest-derived structure malleus endochondral element