Actinomonas mirabilis, Kent, 1880

Aydin, Esra Elif & Lee, Won Je, 2012, Free-living Heterotrophic Flagellates from Intertidal Sediments of Saros Bay, Aegean Sea (Turkey), Acta Protozoologica 51 (2), pp. 119-137 : 120

Actinomonas mirabilis Kent 1880 / Pteridomonas danica Patterson et Fenchel 1985 ( Figs 1a , 2a )

Observation: Cell is about 5 µm long and roundish, and has one flagellum. A ring of arms arounds the flagellum. The single flagellum is about 2.5 times the cell length, emerges from a small depression at the anterior part of the cell and has an undulating beat. The cell is attached to the substrate posteriorly with a stalk which has nodes. One cell found.

Remarks: Actinomonas mirabilis is very similar to Pteridomonas danica in general appearance. As mentioned by previous studies ( Larsen and Patterson 1990, Lee and Patterson 2000), Actinomonas mirabilis is not easily distinguished from Pteridomonas danica at the ligth microscopical level, but at the ultrastructural level they can be distinguished because of the flagellar transitional bands in P. danica and a paraflagellar rod of A. mirabilis . Actinomonas mirabilis / Pteridomonas danica have been reported from marine sites worldwide.

Figures

Fig. 1. a – Actinomonas mirabilis/Pteridomonas danica; b – Amastigomonas mutabilis; c – Ancyromonas micra; d – Bicosoeca conica; e – Bordnamonas tropicana; f – Caecitellus parvulus; g – Cafeteria minuta; h – Cafeteria roenbergensis; i – Cyranomonas australis; j – Developayella elegans; k – Discocelis saleuta; l – Goniomonas amphinema; m – Goniomonas pasifica; n – Kiitoksia ystava; o – Dinema platysomum; p – Anisonema acinus; q – Heteronema exaratum; r – Heteronema ovale; s – Kathablepharis remigera; t – Notosolenus canellatus; u – Massisteria marina; v – Metromonas grandis; w – Neobodo designis; x – Neobodo saliens; y – Percolomonas similis. Scale bar: 10 μm for all figures.

Fig. 2. a – Actinomonas mirabilis/Pteridomonas danica; b – Amastigomonas mutabilis; c – Ancyromonas micra; d – Bicosoeca conica; e – Caecitellus parvulus, note the mouth on the left-hand side; f – Bordnamonas tropicana; g – Cafeteria roenbergensis; h – Cyranomonas australis; i – Developayella elegans; j – Discocelis saleuta; k – Goniomonas amphinema; l – Cafeteria minuta, feeding cell; m – Anisonema acinus, dorsal view, note the ingestion organelle; n – Dinema platysomum, ventral view showing surface striations; o – Goniomonas pacifica; p – Heteronema exaratum, ventral view, general appearance of cell; q – Kathablepharis remigera; r – Massisteria marina; s – Neobodo saliens; t – Neobodo designis; u–v – Heteronema ovale, same cell; u – general appearance; v – extended cell. All micrographs are DIC images. Scale bar: 5 μm for all figures.