Craniate with well-defined heads, thus excluding members of the chordate subphyla Tunicata (tunicates) and Cephalochordata (lancelets), but including Myxini, which have cartilaginous skulls and tooth-like structures composed of keratin. Craniata also includes all lampreys and armoured jawless fishes, armoured fish, sharks, skates, and rays, and teleostomians: spiny sharks, bony fish, lissamphibians, temnospondyls and protoreptiles, sauropsids and mammals. The craniate head consists of a brain, sense organs, including eyes, and a skull. In addition to distinct crania (sing. "cranium"), craniates possess many derived characteristics, which have allowed for more complexity to follow. Molecular-genetic analysis of craniates reveals that, compared to less complex
Wild Animals I Have Known Wild Animals I Have Known Wild Animals I Have Known is an 1898 book by naturalist and author Ernest Thompson Seton. The first entry in a new genre of realistic wild-animal fiction, Seton's first collection of short stories quickly became one of the most popular books of its day. "Lobo the King of Currumpaw", the first story in the collection, was based upon Seton's experience hunting wolves in the southwestern United States. It became a classic, setting the tone for his future works that would similarly depict animals—especially predators who were often demonized in literature—as compassionate, individualistic beings. Several years