| Squatinella mutica ssp. mutica; dorsoventral view. |
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| Squatinella mutica ssp. mutica; lateral view. In contrast to Squatinella rostrum this species has no dorsal spine on the foot (arrowhead). (4) |
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| Squatinella mutica ssp. mutica; ventral view of the head; focus plane on the ventral cilia which -like in many other rotifers- oscillate in a metachronal movement in transversal direction while swimming (2) |
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| Squatinella mutica ssp. mutica; specimen from (3), optical cross-section through the head, a little bit more dorsal than the image above. The left and right bundles of motile cilia are visible just like the eyespots and some nuclei of the brain cells. (5) |
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| Squatinella mutica ssp. mutica; same specimen from (5), two more optical cross-sections through the head, focus plane more dorsal showing the base (upper image) and the tip (lower image) of the dorsal antenna. In the lower image the sensory cilia of the dorsal antenna are visible as well. |
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| Squatinella mutica ssp. mutica; specimen from (5), images showing left (upper image) and right (lower image) lateral antenna. |
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| Squatinella mutica ssp. mutica; two images of a semi-macerated specimen, different focal planes to demonstrate the (?epipharyngeal?) structures in the head of this species. Lower image: on the foot is only a small elevation, but no sting like in Squatinella rostrum (arrow). The arrowheads point to the structures of the lateral antennas. (6) |
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| Location: Gevelsberg, Grünes Klassenzimmer, Teich; (1); (2); Simmelried near Konstanz, Germany (3;4;5) |
| Habitat: periphyton, detritus (1); (2); Detritus (3;4;5) |
| Date: 06.04.2005 (1); 26.01.2016 (2); 06.10.2017 (4); 07.10.2017 (5) |
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