spirotrichs造句

• The remaining spirotrichs form a monophyletic group, but their relationships are uncertain.
• A few of the smaller groups included with them may be genuine spirotrichs, however, such as the Protocruziida.
• The Oligoohymenophorea were first proposed in 1974 as one of three classes of ciliates, together with the Polyhymenophorea or spirotrichs and the now abandoned Kinetofragmophora.
• In some forms there are also body polykinetids, for instance, among the spirotrichs where they generally form bristles called " cirri ".
• The peritrichs were first defined by Friedrich von Stein in 1859 . Initially they were considered spirotrichs, then treated as a separate category, before receiving their modern placement.
• In one order, the Entodiniomorphida, the cilia are arranged into tufts or bands, and may be packed together to form syncilia, resembling the membranelles and cirri of spirotrichs ( with which they were originally classified ) and other ciliates.
• As first defined by B黷schli in 1889 the spirotrichs were one of two orders, together with the now-abandoned holotrichs, and included all ciliates with prominent oral cilia : heterotrichs, hypotrichs, oligotrichs, and peritrichs, although the last were soon separated.