Ciliophora 333 



Family 3. Oxytrichidae 

 Family 4. Paraeuplotidae 

 Suborder 6. Ctenostomina 

 Family 1. Epalcidae 

 Family 2. Mylestomidae 

 Family 3. Discomorphidae 

 Order 3. Peritrichida 

 Family 1. Astylozoonidac 

 Family 2. Epistylidae 

 Family 3. Lagenophryidae 

 Family 4. Ophrydiidae 

 Family 5. Scyphidiidae 

 Family 6. Urceolariidae 

 Family 7. Vaginicolidae 

 Family 8. Vorticellidae 



Order 4. Chonotrichida 

 Family 1. Chilodochonidae 

 Family 2. Stylochonidae 

 Family 3. Spirochonidae 



Class 2. Suctorea 

 Taxonomy 



Family 1. Acinetidae 

 Family 2. Dendrocoraetidae 

 Family 3. Dendrosomidae 

 Family 4. Discophryidae 

 Family 5. Ephelotidae 

 Family 6. Ophryodendridae 

 Family 7. Podophryidae 



Literature cited 



M, 



.EMBERS OF THIS suBPHYLUM posscss cilia or ciliary derivatives 

 in some stage of the life-cycle. The equipment ranges from a complete 

 covering of simple cilia to a relatively few membranelles more or less 

 completely restricted to the peristomial area. Within this range, types of 

 ciliary specialization and patterns of distribution form a major basis for 

 differentiating taxonomic subdivisions. The Ciliophora are usually di- 

 vided into two classes, Ciliatea and Suctorea. In the Ciliatea, cilia or their 

 compound derivatives are present in the dominant phase of the cycle. 

 Suctorea are non-ciliated as adults and have developed peculiar tentacles 

 which function in feeding. The ciliated larval stages characteristic of 

 most species establish the relationship of this group to the Ciliatea and 

 larval ciliary patterns imply that Suctorea^ are more closely related to the 

 Holotrichida than to the more specialized ciliates (82, 103). 



CLASS 1. CILIATEA 



Cilia or compound ciliary organelles are present in active stages of 

 the life-cycle. The ciliates show a variety of trends in specialization of the 

 ciliature, and on this basis may be divided logically into a number of 

 groups. The class includes the Subclasses Protociliatia and Euciliatia. 

 The nuclei of Protociliatia are apparently similar in structure and func- 



^ In fact, some workers believe that the "Class Suctorea," as well as the "Order 

 Peritrichida" and the "Order Chonotrichida," would be more appropriately placed as 

 subdivisions of the Holotrichida, as suggested by Faur6-Fremiet (62). Rapidly accumu- 

 lating data tend to support these proposals, and it now appears that such a taxonomic 

 revision of the ciliates can be expected in the near future. The older system, as followed 

 in the present chapter, presinnably will be replaced by two major subdivisions of the 

 ciliates, (1) a group corresponding to the Holotrichida plus the Suctorea, Chonotrichida, 

 and Peritrichida; and (2) a group probably including the Spirotrichida as now con- 

 stituted. 



