Family PHILODINIDAE 



Corona in the form of two very distinct rings of cilia 

 Common genera — Philodina 

 Rotaria 

 Hahrotrocha 

 Class MONOGONONTA 



With one ovary; with both male and female animals 

 Order FLOSCULARIACEA 



With cilia in two rings around the corona, those of the inner 

 ring longer; with or Vv'ithout a foot ending in a ciliated disc 

 Family FLOSCULARIIDAE 



Single or colonial; usually attached, living in a tube, or 

 with spines or branched appendages; with or without a 

 foot ending in a cliliated disc 

 Common genera — Floscularia Filima 



Octotrocha Pedaha 



Limnias Siynantherina 



Ptygura Lacinularia 



Family CONOCHILIDAE 



Free'swimming colonies 

 Common genus — Conochilns 

 Family TESTUDINELLIDAE 



Free-swimming individuals; either spherical or with a 

 foot ending in a ciliated disc 

 Common genera — Testudinella 



Trochosphaera 

 Order COLLOTHECACEA 



Attached or living in a tube; with or without a foot ending in a 

 ciliated disc; mouth in the center of a large corona 

 Family COLLOTHECIDAE 



Usually with long bristles, which move slowly instead of 

 beating rapidly like ordinary cilia 

 Common genera — Collotheca 



Stephanoceros 

 Family ATROCHIDAE 



No setae or cilia around the corona 

 Common genera — Atrochus 



Cupelopagis 

 Acyclns 

 Order PLOIMA 



Single; free -swimming; with or without a foot ending in one or 

 more toes; corona not as in the preceding two orders 



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