Phylum: RotiferaPhylum: Rotifera

By Mr. ChapmanBy Mr. Chapman

Phylum: RotiferaPhylum: Rotifera Range in size from .1 to 3 mm long and Range in size from .1 to 3 mm long and

are found in most freshwater, some are are found in most freshwater, some are marine.marine.

Usually solitary, free-swimming animals Usually solitary, free-swimming animals

PseudocoelomatePseudocoelomate PseudocoelomatesPseudocoelomates Pseudo- falsePseudo- false Coelum- body cavityCoelum- body cavity PseudocoelPseudocoel

False body cavityFalse body cavity Organ lie free in the Organ lie free in the

cavitycavity

CharacteristicsCharacteristics Triploblastic, bilateral Triploblastic, bilateral

symmetry, symmetry, unsegmented, unsegmented, pseudocoelomatepseudocoelomate

Anterior end with Anterior end with ciliated organ called ciliated organ called coronacorona

Posterior end with toes Posterior end with toes and adhesive glandsand adhesive glands

CharacteristicsCharacteristics Complete digestive system, regionally Complete digestive system, regionally

specializedspecialized Males rare or absentMales rare or absent

Complete digestive Complete digestive SystemSystem

Mechanical breakdown of foodMechanical breakdown of food DigestionDigestion AbsorptionAbsorption Feces formationFeces formation