| Squatinella mutica var. tridentata with oval rump and three tips at the posterior end of the lorica. (2) |
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| Squatinella mutica var. tridentata: left: focus plane on the posterior margin of the lorica with 3 tips. Right: in contrast to S. rostrum the foot has no dorsal spine. |
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| Squatinella mutica var. tridentata: 4 aspects of the head, different focus planes. |
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| Location: Gevelsberg, Grünes Klassenzimmmer, Teich (2) |
| Habitat: Periphyton, Detritus |
| Date: 21.05.05/ 2.09.2005 / 14.04.2007; 11.09.2009 (2) |
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