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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Myersinella

Myersinella Wiszniewski, 1936

Synonym Myersina Wiszniewski, 1934 (ref. ID; 1345, 3688)

ref. ID; 1663

Corona oblique or ventral. Mastax forcipate. Trophi symmetrical. With a posterior projection at the external angles of the rami. Retrocerebral sac absent. Two sandy beach species. Body length 130 µm long. (ref. ID; 1663)

ref. ID; 1923

Uncus a small needle lying across ramus at its mid-length. (ref. ID; 1923)
  1. Myersinella belondon (Harring & Myers, 1928) (ref. ID; 1345, 2019)
    Syn; Erignatha belodon Harring & Myers, 1928 (ref. ID; 1345, 2019); Myersina belodon Wiszniewski, 1934 (ref. ID; 1345, 2019); Myersinella belodon Wiszniewski, 1936 (ref. ID; 1345)
  2. Myersinella tetraglena Wiszniewski, 1934 (ref. ID; 1345, 1923, 2019, 3688, 6939)
    Syn; Myersina tetraglena Wiszniewski, 1934 (ref. ID; 1345, 2019, 3688); Myersinella tetraglena Wiszniewski, 1936 (ref. ID; 1345, 2019)

Myersinella tetraglena Wiszniewski, 1934 (ref. ID; 1345, 1923, 2019, 3688, 6939)

Synonym

Myersina tetraglena Wiszniewski, 1934 (ref. ID; 1345, 2019, 3688); Myersinella tetraglena Wiszniewski, 1936 (ref. ID; 1345, 2019)

Descriptions

Female: The body is opaque, fusiform and ventrally stocky. The head is clearly separated from the trunk. The trunk cuticle has no longitudinal folds, but is is clearly delimited from head and foot. The body is full of small grains of a green-brown colour. According to Wiszniewski (1934), these are not zoochlorellae, but they reflect the nutrition of the species. The foot is large (one quarter of the total body length), and conical in shape. It has irregular transverse wrinkles. The toes are longer than half of the foot length, and strongly pointed. The trophi are small and the parts weak, extremely long and slender. The rami are slightly curved and terminate in obtuse ends. The manubria are slender and also curved. The extremely slender unci are situated at the middle plane of the rami. (ref. ID; 6939)

Habitats

The habitat often cited is the lake psammon, and my results are the first records of M. tetraglaena in the hyporheos of a gravel steam. (ref. ID; 6939)

Examined material

The specimens were colleced from the sediments using either stand pipe traps or surber samplers in the gravel stream Oberer Seebach. (ref. ID; 6939)

Measurement

Total length: 210 µm, toes: 28-30 µm, trophi length: 18 µm, fulcurm: 8 µm, manubria: 12 µm, unci: 6 µm. (ref. ID; 6939)