Three New Microthoracids (Ciliophora, Nassophorea) from Austria and Venezuela

Atef Omar; Wilhelm Foissner

Three New Microthoracids (Ciliophora, Nassophorea) from Austria and Venezuela

Publication date: 19.09.2014

Acta Protozoologica, 2014, Volume 53, Issue 4, pp. 295 - 311

https://doi.org/10.4467/16890027AP.14.027.2022

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Titles

Three New Microthoracids (Ciliophora, Nassophorea) from Austria and Venezuela

Abstract

Using standard methods, we describe three new microthoracids. Drepanomonas minuta nov. spec. is characterized by a small size (in vivo about 22 × 11 µm) and a curious distribution pattern of the extrusomes, viz., only one trichocyst each in mid of dorsal margin and near posterior end of ventral side. Body size and shape of D. minuta highly resemble D. revoluta – for which a new morphometric characterization is provided – which, however, has a deep, broad furrow on the left side and more than 10 extrusomes. Drepanomonas multidentata nov. spec. was discovered in ephemeral grassland puddles on the north coast of Venezuela. It is a comparatively large species (in vivo 45 × 25 µm) with a total of nine spines, of which those on the left posterior half form a highly characteristic tridentate pattern. Curiously, this species lacks extrusomes. Leptopharynx lajacola nov. spec. was discovered in an ephemeral puddle on a granitic outcropping (Laja) in Venezuela. This species resembles L. costatus but is unique in having a quadrangular outline and a strongly curved oral basket with the opening directed posteriorly. In the past four years, we have described 10 new microthoracids, showing that their diversity is far from being exhausted.

Keywords

ciliates, Drepanomonas, Leptopharynx, new species, soil ciliates, biodiversity

References

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Foissner W. (1979) Taxonomische Studien über die Ciliaten des Großglocknergebietes (Hohe Tauern, Österreich). Familien Microthoracidae, Chilodonellidae und Furgasoniidae. Sber. öst. Akad. Wiss. Wien 188: 27–43

Foissner W. (1985) Morphologie und Infraciliatur der Genera Microthorax und Stammeridium und Klassifikation der Microthoracina Jankowski, 1967 (Protozoa: Ciliophora). Zool. Anz. 214: 33–53

Foissner W. (1987) Neue terrestrische und limnische Ciliaten (Protozoa, Ciliophora) aus Österreich und Deutschland. Sber. öst. Akad. Wiss. Wien 195: 217–268

Foissner W. (1991) Basic light and scanning electron microscopic methods for taxonomic studies of ciliated protozoa. Eur. J. Protistol. 27: 313–330

Foissner W., Berger H., Kohmann F. (1994) Taxonomische und ökologische Revision der Ciliaten des Saprobiensystems – Band III: Hymenostomata, Prostomatida, Nassulida. Informationsberichte des Bayer. Landesamtes für Wasserwirtschaft 1/94: 1–548

Foissner W., Agatha S., Berger H. (2002) Soil ciliates (Protozoa, Ciliophora) from Namibia (Southwest Africa), with emphasis on two contrasting environments, the Etosha region and the Namib Desert. Denisia 5: 1–1459

Foissner W., Wolf K., Yashchenko V., Stoeck T. (2011) Description of Leptopharynx bromelicola n. sp. and characterization of the genus Leptopharynx Mermod, 1914 (Protista, Ciliophora). J. Eukaryot. Microbiol. 58: 134–151

Fresenius G. (1858) Beiträge zur Kenntnis mikroskopischer Organismen. Abh. senckenb. naturforsch. Ges. 2: 211–242

Gong J., Stoeck T., Yi Z., Miao M., Zhang Q., Roberts D. M., Warren A., Song W. (2009) Small subunit rRNA phylogenies show that the class Nassophorea is not monophyletic (phylum Ciliophora). J. Eukaryot. Microbiol. 56: 339–347

Jankowski A. V. (1967) A new system of ciliate protozoa (Ciliophora). Trud. zool. Inst., Leningr. 43: 3–52 (in Russian)

Kreutz M. (1998) Beobachtungen an zwei Arten der Ciliatengattung Drepanomonas. Mikrokosmos 87: 321–327

Omar A., Foissner W. (2011) Description of Leptopharynx bromeliophilus nov. spec. and Leptopharynx australiensis nov. spec. (Ciliophora, Nassulida). Acta Protozool. 50: 89–103

Omar A., Foissner W. (2012a) Description of Leptopharynx brasiliensis nov. spec. and Leptopharynx costatus gonohymen nov. subspec. (Ciliophora, Microthoracida). Eur. J. Protistol. 48: 30–47

Omar A., Foissner W. (2012b) Neotypification and ontogenesis of Leptopharynx costatus costatus Mermod, 1914. J. Eukaryot. Microbiol. 59: 268–286

Omar A., Foissner W. (2013) Description of two new Drepanomonas taxa and an account on features defining species in Drepanomonas Fresenius, 1858 (Ciliophora, Microthoracida). Eur. J. Protistol. 49: 420–437

Penard E. (1922) Études sur les infusoires d’eau douce. Georg et Cie, Genève

Small E. B., Lynn D. H. (1981) A new macrosystem for the phylum Ciliophora Doflein, 1901. BioSystems 14: 387–401

Wrześniowski A. (1870) Beobachtungen über Infusorien aus der Umgebung von Warschau. Z. wiss. Zool. 20: 467–511

Information

Information: Acta Protozoologica, 2014, Volume 53, Issue 4, pp. 295 - 311

DOI: https://doi.org/10.4467/16890027AP.14.027.2022

Article type: Original article

Authors

Atef Omar

Universität Salzburg, FB Organismische Biologie, Salzburg, Austria

Wilhelm Foissner

Paris Lodron University of Salzburg, FB Ecology and Evolution, Salzburg, Austria

Published at: 19.09.2014

Article status: Open

Licence: None

Percentage share of authors:

Atef Omar (Author) - 50%

Wilhelm Foissner (Author) - 50%

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Publication languages:

English

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Number of downloads: 1404

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