Rotaria quadrioculata Murray, 1902

1. Rotaria quadricoculata; swimming specimen, dorsoventral view. A characteristic trait are the thick bolsters on the divided upper lip (arrowheads). The moss-sample from which these specimens were observed had been dry for 3 months, which is remarkable for a Rotaria-species. (3)
2. Rotaria quadricoculata; creeping specimen, dorsoventral view. (3)
Rotaria quadrioculata; whirling/ feeding specimen, while being attached to a grain of detritus. (1)
Rotaria quadrioculata; anterior part of two different feeding specimens, showing the divided upper lip. Left: specimen from (1); right: specimen from (2)
2. Rotaria quadricoculata; two images of the anterior part, corona retracted. Left: dorsoventral view. Right: frontal view; focus plane on the rostrum with two (not four !!) eyespots and the dorsal antenna, which looks like truncated at the top.
2.Rotaria quadricoculata; foot with spurs and interspace
3.Rotaria quadricoculata; part of digestive system of a partially macerated specimen (right is the anterior part of the specimen). Pe: pedicels; BT: buccal tube; Mx: mastax with trophi ; SL: stomach lumen.
4.Rotaria quadricoculata; ramate trophi . Left: cephalic view; dental formula 3/ 2+1. Right: caudal view; ramus length (RaL): 18µm
Sample (3) collection courtesy of Dr. D. Fontaneto, Verbania, Italy
Location (1); (2): Lennep; NRW, Germany; water reservoir Wuppertalsperre, compensation pond
Habitat (1); (2) : moss
Date (1); (2): coll.: 14.01.2012; img.: 19.01.2012 ;
Location (3): Risør, Norway;  
Habitat (3): moss (Sphagnum)
Date (3): coll.: 10.09.2021; img.: img.: 13.12.2021
Sample (3) courtesy of Dr. D. Fontaneto, Verbania, Italy
freshwater life
marine life