The angular is a large bone in the lower jaw of amphibians, birds and reptiles, which is connected to all other lower jaw bones: the dentary (which is the entire lower jaw in mammals), the splenial, the suprangular, and the articular Also see: Angular momentum. For other uses, see Bone (disambiguation), including Bones which redirects here. ... It has been suggested that this article or section be merged with mandible. ... For other uses, see Amphibian (disambiguation). ... For other meanings of bird, see bird (disambiguation). ... Orders  Crocodilia - Crocodilians scary crocodiles. ... The dentary is the tooth bearing bone of the lower jaw. ... Orders Subclass Monotremata Monotremata Subclass Marsupialia Didelphimorphia Paucituberculata Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Subclass Placentalia Xenarthra Dermoptera Desmostylia Scandentia Primates Rodentia Lagomorpha Insectivora Chiroptera Pholidota Carnivora Perissodactyla Artiodactyla Cetacea Afrosoricida Macroscelidea Tubulidentata Hyracoidea Proboscidea Sirenia The mammals are the class of vertebrate animals primarily characterized by the presence of mammary... The splenial is a small bone in the lower jaw of reptiles, amphibians and birds, usually located on the lingual side (closest to the tongue) between the angular and suprangular. ... A jaw bone found in most land vertebrates, except mammals. ... The articular is a bone in the lower jaw of most tetrapods, including reptiles, birds, and amphibians, but has become a middle ear bone (the malleus) in mammals. ... Gyroscope. ...