Animal Taxonomy

1. Animal Taxonomy

3. Kingdom: Animalia Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Division: Triploblastica Sbdivision: coelomates Phylum: Mollusca 1-Class: Gastropoda Example: snails

4. Phylum: Mollusca • Mollusca includes snailsand slugs, octopuses and squids. • Most mollusks are marine, though some inhabit fresh water, and some snails and slugs live on land. • Mollusks are soft-bodied animals, but most are protected by a hard shell of calcium carbonate. • All mollusks have a muscular foot for locomotion, a visceral mass with most of the internal organs, and a mantle. • Most mollusks have separate sexes, with gonads located in the visceral mass, and some are hermaphrodites.

5. 1-Class: Gastropoda Example: snails • Most Gastropoda are marine, but there are also many freshwater species. • The anus and mantle cavity are above the head in adults.

6. Most gastropods are protected by a spiraled shell. • Other species have lost their shells entirely and may have chemical defenses against predators. • Many gastropods have distinct heads with eyes at the tips of tentacles. • They move by their foot. • Some species are predators.

7. Kingdom: Animalia Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Division: Triploblastica Sbdivision: coelomates Phylum: Mollusca 2- Class: Cephalopoda Example: Octopus

8. 2- Class: Cephalopoda Example: Octopus • Cephalopods use rapid movements toward their prey which they capture with several long tentacles. • A mantle covers the visceral mass, but the shell is reduced and internal in squids missing in many octopuses. • The foot of a cephalopod (“head foot”) has been modified into the muscular siphon and parts of the tentacles • Most octopuses live on the seafloor. • Cephalopods have an active, predaceous lifestyle. • They have a well-developed nervous system with a complex brain and well-developed sense organs.

9. Kingdom: Animalia Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Division: Triploblastica Sbdivision: coelomates Phylum: Annelida Class: Oligochaeta Genus: Allolobophora (Earthworm) Species: caliginosa Allolobophoracaliginosa

10. All annelids (“little rings”) have segmented bodies. • Annelids live in the sea, most freshwater habitats, and damp soil. • The coelom of the earthworm, a typical annelid, is partitioned by septa, but the digestive tract, longitudinal blood vessels, and nerve cords penetrate the septa and run the animal’s length. • Most annelids, including earthworms, burrow in sand and silt.

11. The digestive system consists of a pharynxء, an esophagus, crop, gizzard and intestine • The closed circulatory system carries blood with oxygen-carrying hemoglobin through dorsal and ventral vessels connected by segmental vessels.

12. In each segment is a pair of excretory tubes, metanephridia, that remove wastes from the blood and coelomic fluid. • Earthworms are cross-fertilizing hermaphrodites. • Some earthworms can also reproduce asexually by fragmentation followed by regeneration.

13. Kingdom: Animalia Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Division: Triploblastica Sbdivision: pseudocoelomates Phylum: Nematoda (Roundworms) Class: Rhalditea Order: Ascariida Family: Ascariidae Genus: Ascaris Species: lumbricoides Ascarislumbricoides

14. Ascaris • Roundworms are pseudocoelomates covered by tough cuticles • Roundworms are found in most aquatic habitats, wet soil, moist tissues of plants, and the body fluids and tissues of animals. • Some species parasitize animals. • They range in length from less than 1 mm to more than a meter. • The body of Nematode is covered with a tough exoskeleton, the cuticle. • They have a complete digestive tract. • Nematodes usually engage in sexual reproduction.

15. The Summary