Rotaria sordida Western, 1893 - an eyeless Rotaria species
Rotaria sordida, whirling, specimen from (4).
Rotaria sordida, head with rostrum crop of the above image (4). in the same sample Macrotrachela multispinosa was observed.
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)
Rotaria sordida, creeping, additional specimen , stretched rostrum (3)
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)
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)
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)
Rotaria sordida; detail of the sculptured integument with pores. (6)
Rotaria sordida, whirling specimen from (1)
Rotaria sordida; left: dorsal antenna (arrow). right: spurs (1)
Rotaria sordida; specimen from (5); trophi with dental formula 2/2
Rotaria sordida; whirling (feeding) specimen from (7); dorsoventral view.
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)
freshwater life
marine life