Philodina megalotrocha EHRENBERG 1832
Philodina megalotrocha, swimming specimen, dorsoventral view. A species with barrel-shaped trunk that is distinct from the cylinder-shaped foot. Sulcus is very wide (sulcus width ≥ width of trochal disc). The orange eyespots are clearly visible (2).
Philodina megalotrocha, whirling, another specimen from the same location as above, while attached to filamentuous algae. The rotifer uses the corona also for swimming. (2).
Philodina megalotrocha, head while whirling, focus plane on the upper lip. (2)
Philodina megalotrocha, creeping, ventral view showing the rostrum (2).
Philodina megalotrocha, frontal view of specimen from (4), showing the upper lip
Philodina megalotrocha, lateral view of a specimen with an egg. Like most Philodina-species also P. megalotrocha is oviparous. A characteristic behavior of P. megalotrocha is that the eggs are attached to filamentous alge like the Mougeotia sp. here. The current created by the cilia of the trochal discs brings fresh water to the egg; so this is some sort of parental care (1).
Philodina megalotrocha, foot with toes and egg (1).
Philodina megalotrocha, egg (1).
Philodina megalotrocha, ramate trophi with dental formula 2/2 (3)
Philodina megalotrocha, foot with spurs (3)
Location: Gevelsberg, Green Classroom, pond (1); Passo di Lavazè (1800m), Trentino, Italia, lake (2), Anhausen, Bavaria, fishponds (3); Gwell Kaer, Brittany, France; creek (4)
Habitat: Periphyton (1); Periphyton with Fragilaria sp., Spirogyra sp., Desmidium swartzii, Diatoms, together with Otostephanos donneri and Cephalodella paxi (2); Periphyton (3); (4)
Date: 2..9.2005 (1); coll.: 28.09.2013; img.: 03.10.2013) (2); coll.: 29.9.2013, img 3.10.2013 (3); 22.08.2020 (4)
freshwater life
marine life