Vorticella convallaria as illustrated in Shen & Zhang (1990) Biomonitoring Techniques Using Freshwater Microbiota, China Architecture and Building Press. This image was taken with permission from Modern Biomonitoring Techniques Using Freshwater Microbiota written by Shen Yunfen, Zhang Zongshe and colleagues, and published by China Architecture and Building Press in 1990. Image copyright: China Architecture and Building Press, used under license to MBL (micro*scope).
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From the collection
Protozoan biomonitors in China
|Description of Vorticella convallaria: Stalked, sessile peritrich ciliate; body 30-120 micrometres long, pedicle 100-500 micrometres. Bell-shaped, somewhat conical body, usually twice as long as it is broad; light in colour, often yellowish. Peristomial lip slightly rolled over. Pellicle with transverse ridges (annulations). Stalk relatively thick, containing spasmonemes that enable it to contract with extreme suddenness. The contracted stalk is helical. Macronucleus long, vermiform, often J-shaped. Found in large groups. Freshwater in stagnant conditions. |