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
Transportation of animals Transportation of animals The transportation of animals is the intentional movement of animals by transport. Common categories of animals which are transported include livestock destined for sale or slaughter; zoological specimens; laboratory animals; race horses; pets; and wild animals being rescued or relocated. Methods of transporting animals vary greatly from species to species. Humans have been transporting animals for a variety of purposes for thousands of years, with numerous accounts of animal transportation from the ancient world. Animals were transported for Roman circuses and for use as military animals. Two well-known historical examples of animals transported to foreign countries are