110 (109) Ciliary rows equidistant, usually about two-thirds cell length. Family 

 ANCISTROCOMIDAE (also see couplets 28 and 98). 



110 (109) Ciliary rows in 2 longitudinal groups of 4-6 short ciliary rows each. . Ill 



111 (110) Cell pyriform. Tomite of member of family SPHENOPHRYIDAE (also 

 see couplet 113). 



Ill (110) Cell laterally compressed. Ridge separating the 2 ciliated surfaces. 

 Family SPHENOPHRYIDAE (Lwoffia cilifera). 



112 (1) One to many sucking tentacles present 113 



112 (1) No sucking tentacles present. Attached to exoskeletal hairs of crustaceans. 

 Family ASKOELLIDAE (Conidiophrys) (also see couplet 91). 



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