Metromonas grandis Larsen and Patterson 1990

Lee, Won Je, 2015, Small Free-Living Heterotrophic Flagellates from Marine Sediments of Gippsland Basin, South-Eastern Australia, Acta Protozoologica 54 (1), pp. 53-76 : 67-68

publication ID

https://doi.org/ 10.4467/16890027AP.15.005.2192

DOI

https://doi.org/10.5281/zenodo.12522333

persistent identifier

https://treatment.plazi.org/id/0B708784-E66D-8920-FCA3-F9732786D0FC

treatment provided by

Felipe

scientific name

Metromonas grandis Larsen and Patterson 1990
status

 

Metromonas grandis Larsen and Patterson 1990 ( Fig. 4i View Fig )

Observation: Cells are leaf shaped, 5 to 11 µm long and dorso-ventrally flattened. One side of the cell appears folded. The cells have two flagella of unequal length. The long flagellum is 1.5 to 2.5 times the cell length and trails behind the cell when gliding. The shorter flagellum is inactive, less than 2 µm long, and inserts to the right of the major flagellum and is always present. The nucleus lies near the flagellar insertion. The cells attach to the substratum with the longer flagellum and move with a nodding action – like a pendulum. Relatively common.

Remarks: This species was reported from marine sites in Australia, Brazil, Fiji, Hawaii and Turkey (Aegean Sea), and cell length reported was 5 to 12 µm ( Larsen and Patterson 1990; Tong et al. 1998; Lee and Patterson 2000; Al-Qassab et al. 2002; Lee 2002b, 2006b; Aydin and Lee 2012). Generally, the current observations are in agreement with those of Larsen and Patterson (1990) and Lee and Patterson (2000; p. 552, Fig. 26f). Metromonas grandis is distinguished from M. simplex by its cell shape, slightly larger size and folded margin. The cell shape and folded margin may be good diagnostic characters for this species. This species usually co-occurs with M. simplex . According to Lee (2002b), Skvortzov (1957) reported 9 new Ancyromonas species with one long flagellum, but these species may be gliding stages of Metromonas . The short flagellum in Metromonas is easy to overlook.

Kingdom

Protozoa

Phylum

Cercozoa

Genus

Metromonas

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