Type of animal science:Classification Fields of study: Anatomy, evolutionary science, physiology, systematics (taxonomy), zoology Jawless vertebrates, or Agnatha, are represented today by the lamprey and hagfish. These organisms are of great interest
as the survivors of a once-flourishing group of Paleozoic vertebrates that includes the earliest vertebrates in the
Type of animal science: Anatomy, behavior, classification, ecology, evolution Fields of study: Conservation biology, ecology, ethology, zoology Over fifty species of lemurs have been identified and classified in the superfamily Lermuroidea in the Primate order.
They have evolved separately from East African and other primates for at least forty million years.
Type of animal science: Classification Fields of study: Anatomy, physiology, zoology Large cats widely distributed over Africa and Asia, leopards have the greatest geographic range of any wild cat, but
face severe pressure from humans within many of their natural habitats.
Type of animal science: Classification Fields of study: Anatomy, wildlife ecology Lions, celebrated in myth as the King of Beasts, are the second largest of the big cats and the only members of the
Felidae family to live and hunt in groups in the wild.
Type of animal science: Behavior, classification, ecology, evolution, reproduction Fields of study: Anatomy, conservation biology, herpetology, physiology, systematics (taxonomy),
zoology More than six thousand species of reptiles have been identified and named. They are classified in the order Squamata,
of which slightly more than four thousand are lizards. The remainder are snakes. Technically, snakes comprise one
group of limbless lizards. Squamata is the largest order of extant reptiles.
Type of animal science: Anatomy, classification Fields of study:Anatomy, invertebrate biology, marine biology Lobster are joint-legged crustaceans of the phylum Arthropoda. Phylum characteristics include a
chitinous exoskeleton, jointed appendages, a ventral nervous system, and a dorsal brain.
Type of animal science: Classification Fields of study: Anatomy, evolutionary science, paleontology, systematics (taxonomy) Lungfish are freshwater members of the subclass Sarcopterygii, the fleshy- or lobed-finned fishes. As their name indicates,
lungfish have lungs evolved from the swim bladder and can breathe air. Because they are among the fishes most
closely related to the tetrapods, they play a crucial if controversial role in the study of vertebrate evolution.