| Rotaria sordida, whirling, specimen from (4). |
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| Rotaria sordida, head with rostrum crop of the above image (4). in the same sample Macrotrachela multispinosa was observed. |
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| Rotaria sordida, creeping ; the trunk has a characteristic covering of mucus and detritus. The rostrum and head are very long. While many Rotaria-species have conspicuous eyespots this species is eyeless which helps to distinguish it from R. tardigrada or Dissotrocha hertzogi (2) |
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| Rotaria sordida, creeping, additional specimen , stretched rostrum (3) |
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| Rotaria sordida; conspicuous rostrum (the length of which is marked by two triangles) and two conspicuous bumps on each side of the head (marked with arrows). (2) |
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| Rotaria sordida; the rostrum is the apical part with which creeping in most bdelloids is accomplished. The left image shows a lamella of the rostrum. Furthermore the rostrum bears cilia which can be outstretched (right image). The cilia have sensory function. (3) |
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| Rotaria sordida; focal plane on the posterior part, the anal segment shows a ring (long triangle), the foot with 3 toes which excrete sticky threads (shown by triangles) to adhere to the substrate. (3) |
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| Rotaria sordida; detail of the sculptured integument with pores. (6) |
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| Rotaria sordida, whirling specimen from (1) |
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| Rotaria sordida; left: dorsal antenna (arrow). right: spurs (1) |
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| Rotaria sordida; specimen from (5); trophi with dental formula 2/2 |
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| Rotaria sordida; whirling (feeding) specimen from (7); dorsoventral view. |
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| Rotaria sordida; creeping specimen with extended rostrum/ rostrum lamella from (8); dorsoventral view. |
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| Location : Gevelsberg, Stefansbachtal, Brücke am Schulzentrum (1);Gevelsberg, Grünes Klassenzimmer, Teich (2); Hattingen Oberstüter, forest (2); Club Ocellaris, Anilao, Philippines (4); Le Conquete, Brittany, church yard, granite bowl (5); Fort du Mengant, Brittany, France (6); MERO, Tulamben, Bali, Indonesia; wall (7) |
| Habitat: liverwort (Marchantia polymorpha)(1); periphyton (2); beech litter (3); (Moss on limestone (4); between algae (5); moss (6); (7) |
| Date: 26.9./ 27.9. 2008 (1); 30.12.2012 (2); 28.04.2016 (3); 13.08.2018 (5); 15.08.2020 (6); 06.09.2023 (7) |
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