Phylum - Annelida
- Body - long, cylindrical and metamerically segmented.
- Most - free-living. few - ectoparasites.
- Free-living animals - marine or fresh water dwellers or terrestrial.
- Triploblastic, bilaterally symmetrical and eucoelomate.a
- Have setae or parapodia or suckers for locomotion.
- Body is covered with special cuticle.
- Either hermaphrodite or unisexual.
- Examples: Earthworm, Leech, Nereis, etc.
Phylum- Arthropoda :
- Have jointed appendages.
- Highest number of animals from this phylum.
- Largest phylum with highly successful animals
- Found in all types of habitats.
- Triploblastic, eucoelomate, bilaterally symmetrical and segmented.
- Chitinous exoskeleton.
- Unisexual.
- Examples: Crab, spider, scorpion, millipede, centipede, cockroach, butterfly, honey bee, etc.