Habrotrocha aspera Bryce 1892
Habrotrocha aspera, whirling; trunk with granulated integument; head with bridge between trochal discs and a conspicuous point (arrow). (1)
Habrotrocha aspera, anterior part of different feeding specimens; Left: focal plane on the characteristic upper lip (1). Right: focal plane on the ligule in the membrane ("bridge") betwen the trochal discs. (2)
Habrotrocha aspera, creeping animal, focus plane on the tubercules of the integument. H. aspera is a slow moving animal. (1)
Habrotrocha aspera, two aspects of the dorsal integument of another specimen the tubercules of the integument. Upper image: anterior part of the trunk with two different types of tubercules. Lower image: integument of rump with another type of tubercules. (4)
Habrotrocha aspera, creeping specimen from (4), dorsoventral view (4)
Habrotrocha aspera; specimen from (3), whirling, dorsoventral view. .(2)
Habrotrocha aspera; two aspects of the head. Left: focus plane on the upper lip. Right: focus plane slightly more ventral.(2)
Habrotrocha aspera; two aspects of the ramate trophi. Left: cephalic view; dental formula (DF): 2/2. Right: caudal view; ramus length (RaL): 17µm (4)
Differential diagnosis: can be confused with Philodina rugosa or Habrotrocha crenata. Philodina rugosa has a similar granulated integument, but has dental formula 3/3, has cervical eyespots (on the trunk) . The corona of P. rugosa is much wider. Habrotrocha crenata has dental formula 8/8 and lacks the ligula between the trochal discs.
Location (4): Oberstueter, Hattingen, NRW, Germany, forest
Habitat (4): tree moss (click image to enlarge >>>)
Date: 30.10.2023 (4)
Location: Germany, Nature Reserve Elmpt, moss (1); Kvitøya, Svalbard archipelago (2)
Habitat: moss (1); (2)
Date: 15/16.6.2013; coll.: 7/2017; img.: 19.11.2017 (2)
freshwater life
marine life