09-22-2021-1050 - heterotrichs Spirostomum protozoa

 The heterotrichs are a class of ciliates. They typically have a prominent adoral zone of membranelles circling the mouth, used in locomotion and feeding, and shorter cilia on the rest of the body. Many species are highly contractile, and are typically compressed or conical in form.^[1] These include some of the largest protozoa, such as Stentor and Spirostomum, as well as many brightly pigmented forms, such as certain Blepharisma.

Heterotrich
Stentor roeselii
Scientific classification
Clade:	SAR
Infrakingdom:	Alveolata
Phylum:	Ciliophora
Subphylum:	Postciliodesmatophora
Class:	Heterotrichea Stein 1859
Order:	Heterotrichida Stein 1859
Families
Blepharismidae Jankowksi in Small & Lynn, 1985 Climacostomidae Repak, 1972 Condylostomatidae Kahl in Doflein& Reichenow, 1929 Folliculinidae Dons, 1914 Maristentoridae Miao, Simpson, Fu. & Lobban, 2005 Peritromidae Stein, 1867 Spirostomidae Stein, 1867 Stentoridae Carus, 1863

https://en.wikipedia.org/wiki/Heterotrich