Adineta gracilis Janson, 1893
Adineta gracilis, specimen from (3), creeping, dorsoventral view
Adineta gracilis, very slender specimen from (4). See also here
Adineta gracilis, lateral view of specimen "grazing" on a detritus particle. (8).
Adineta gracilis, fluorescence image of specimen stained with Calcofluor; ventral view. Calcofluor binds to polysaccharides like chitin or cellulose. The dashed frame marks the mastax with the light-blue trophi. The left (lRA) and right (rRA) rake apparatus are V-shaped, which is different from other Adineta species. While the trophi and rake apparatus are supposedly chitinous structures the structure marked by an arrow is the cell wall of a green algae that consists of cellulose.
Adineta gracilis, another specimen with focal plane on the dorsal surface of the head (2)
Adineta gracilis, ventral ciliated field with "auricles" at the left and right margin (2)
Adineta gracilis, the ventral ciliated field can be hidden behind a "curtain" formed by Cingulum (2).
Adineta gracilis, lateral view of the head of specimen from (8).
Adineta gracilis, trophi with dental formula 2/2 (2)
Adineta gracilis, 4 aspects of the head, dorsoventral view. Upper left: focal plane on the dorsal elevation of the head. Upper right: focal plane slightly more ventral. Lower left: focal plane on the mid-section of the head. The arrowheads point to two ?excavations? which can be also observed in other Adineta-species e.g. A. rhomboidea. M: mouth. Lower right: Ventral view on ciliary field. In contrast to other Adineta species a gracilis has no hooks in the prehensile apparatus.(3)
Adineta gracilis, ciliary field and prehensile apparatus from a specimen from (5)
Adineta gracilis, foot with spurs from two different specimens. Left: specimen from (7); right: specimen from (4), dorsal view.
Adineta gracilis, this specimen has unambiguously 4 nuclei in the vitellarium (arrows) (4).
Adineta gracilis, specimen after application of NeutralRed. Aside from the osmotic effect on the hypodermis cells in the head (which contract) the 4 nuclei of the vitellarium are stained. (6a)
Adineta gracilis, specimen from (9)
Location: nature reserve Bourtange ; 52∞39'47.49"N / 7∞ 3'21.76"O (1;); Wahner Heide near Cologne (3); Ossian Sarsfjellet, James I Land, Svalbard (4); NSG Heiliges Meer (2;5); Mauvangen, Norway (6); Ohligser Heide (7), Obfelden, Switzerland (8); Aber Benoit, Brittany; France (9)
Habitat: Sphagnum-bog (1;2;3;5); moss (4); sphagnum (6,7); Frullania dilatata on bark of oak tree (8); liverwort (9)
Date: 1.5.2009/ 8.11.2012 (1); 10.11.2012 (2); 11.12.2014 (3); 18.10.2015 (4); 22.04.2012 (5); coll.: 17.07.2016, img:16.08.2016 (6), 09.08 (6a); 24.01.2016 (7); 27.11.2017 (8); 18.08.2019 (9)
freshwater life
marine life