| Macrotrachela quadricornifera var. rigida: whirling specimen with open corona, ventral view. In contrast to M. quadricornifera ligulata, M. quadricornifera loricata, M. quadricornifera scutellata (with acute appendages) this morphotype has rounded appendages with wide interspace (arrowheads) on the dorsal side of the 1st foot pseudosegment. This optical transect also shows the ventral side of the head with lower lip in focus.(1) |
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| Macrotrachela quadricornifera var. rigida: somewhat lateral view of creeping specimen showing the left dorsal appendage in focus.(1) |
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| Macrotrachela quadricornifera var. rigida: dorsal view of creeping specimen; focal plane on the appendages. .(1) |
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| Macrotrachela quadricornifera var. rigida: whirling, dorsal view. Focal plane on the "complicated" (Milne) upper lip.(1) |
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| Macrotrachela quadricornifera var. rigida: frontal view of another whirling specimen. Focal plane on the "complicated" upper lip. (2) |
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| Macrotrachela quadricornifera var. rigida: 4 aspects of the head with open corona, different focal planes. Upper left: dorsal view; focal plane on the rostrum/ upper lip and two structures on the bolsters between pedicels and upper lip. Upper right: dorsoventral view, optical transect focal plane on sulcus and buccal field. Lower left: focal plane on the cilia of the cingulum and circumapical band. Lower right: focal plane on the on the lower lip. (1) |
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| Macrotrachela quadricornifera var. rigida: 2 aspects of the foot/ spurs; ventral view. (1) |
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| Macrotrachela quadricornifera var. rigida: foot with foot glands and retractor muscles. Left image: focal plane on the dorsal toe which seems to be devided into two exits of the foot glands. Right: focal plane on the ventral toes. (1) |
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| Macrotrachela quadricornifera var. rigida: foot/ rump region of a macerated specimen. On the left the two rouneed appendages on the 1st foot pseuosegment are visible. (1) |
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| Macrotrachela quadricornifera var. rigida: integument with pores. (1) |
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| Macrotrachela quadricornifera var. rigida: ramate trophi. Left: cephalic view; right: caudal view. Dental formula: 1+2 / 2+1; rami length (RaL): 25µm (1) |
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| more on Macrotrachela quadricornifera >>>> |
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Location (1); (2): Hattingen Wodantal, bridge, puddle (click to enlarge) |
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| Habitat (1); (2): moss & cyanobacteria |
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| Date: 29.09.2024 (1); 06.10.2024 (2) |
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