| Testudinella patina, dorsoventral view; specimen from (2). |
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| Testudinella patina, dorsoventral view; specimen from (2), foot retracted. |
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| Testudinella patina, specimen from (1); focus plane on the retractor muscles. The arrow points to the foot opening in the ventral part of the lorica (foot is retracted). |
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| Testudinella patina, crop of the above image: transversely striated retractor muscles. |
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| Testudinella patina, contracted specimen. (3) |
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| Testudinella patina, foot. Testudinella is the only rotifer genus with cilia on the posterior end of the foot. (4) |
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| Location: Wahner Heide near Cologne, Germany, ditch, (1); Hattingen, Wodantal, pond (2); Water reservoir Heilenbecker Talsperre (3); Hattingen Oberstüter, garden pond (4) |
| Habitat: plankton/ between algae (1;2;3); between algae (4); |
| Date: 02.06.2010 (1); 22.05.2015 (2); 01.03.2012 (3); 21.10. 2012 (4) |
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