Description
No lorica , or if appearing loricate , "lorica " is an extension of broad , short stalk (Fig. 54). • 0 0 c (from Matthes , 1954) C. Swarmer of Oiscophrya steinii. (f rom Batisse , 1994) 546 CILIOPHORA, NASSOPHOREA CLASS NASSOPHOREA Small & Lynn, 1981 Somatic cilia as monokinetids , dikinetids , or polykinetids ; monokinetid with anterior , tangential transverse ribbon , a divergent postciliary ribbon , and anteriorly directed kinetodesmal fibril ; for dikinetids , only the anterior kinetosome has a transverse ribbon while the posterior kinetosome has a postciliary ribbon and kinetodesmal fib r i I ; polykinetids are cirrus-like in one family (i.e. , Discotrichidae) ; somatic alveoli well developed with paired alveolocysts present in two orders ; cyrtos well-developed in several groups, and typical of class; oral polykinetids having alveoli between kinetosomal rows ; extrusomes , when present , are fibrous trichocysts ; three orders . b 9 <9 t;? 1. Synhymenium of dikinetids or small polykinetids (i.e ., usually of four kineto- somes) , extending (from right postoral body surface to left dorsal body surface ....................... ......... .......... ..... .. ...... Synhymeniida 1'. Synhymenium , if present, not as above .... ... ..... .2 2. Somatic ciliation typically dense, with numerous somatic kineties ; kinetosomes with both a proximal and distal cartwheel ; synhymenium, if present, beginning in postoral region and extending to lateral left; extrusomes , rod-like when present .... ................ .. Nassulida 2' . Oral polykinetids adjacent to cytostome; somatic ciliation , somewhat sparse , with few somatic kineties ; trichocysts anchor-like at tip .... .. ... ...... .. ............ ... ......... .... .. Microthoracida
Type species
Figures
Raw text
No lorica , or if appearing loricate , "lorica " is an extension of broad , short stalk (Fig. 54). • 0 0 c (from Matthes , 1954) C. Swarmer of Oiscophrya steinii. (f rom Batisse , 1994) 546 CILIOPHORA, NASSOPHOREA CLASS NASSOPHOREA Small & Lynn, 1981 Somatic cilia as monokinetids , dikinetids , or polykinetids ; monokinetid with anterior , tangential transverse ribbon , a divergent postciliary ribbon , and anteriorly directed kinetodesmal fibril ; for dikinetids , only the anterior kinetosome has a transverse ribbon while the posterior kinetosome has a postciliary ribbon and kinetodesmal fib r i I ; polykinetids are cirrus-like in one family (i.e. , Discotrichidae) ; somatic alveoli well developed with paired alveolocysts present in two orders ; cyrtos well-developed in several groups, and typical of class; oral polykinetids having alveoli between kinetosomal rows ; extrusomes , when present , are fibrous trichocysts ; three orders . b 9 <9 t;? 1. Synhymenium of dikinetids or small polykinetids (i.e ., usually of four kineto- somes) , extending (from right postoral body surface to left dorsal body surface ....................... ......... .......... ..... .. ...... Synhymeniida 1'. Synhymenium , if present, not as above .... ... ..... .2 2. Somatic ciliation typically dense, with numerous somatic kineties ; kinetosomes with both a proximal and distal cartwheel ; synhymenium, if present, beginning in postoral region and extending to lateral left; extrusomes , rod-like when present .... ................ .. Nassulida 2' . Oral polykinetids adjacent to cytostome; somatic ciliation , somewhat sparse , with few somatic kineties ; trichocysts anchor-like at tip .... .. ... ...... .. ............ ... ......... .... .. Microthoracida