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Trachelomonas volzii vs T. dubia (Euglenophyceae)—one or two separate species? Study on similarities and differences of the species



This study concerns the two species Trachelomonas volzii and T. dubia which were examined for similarities and dissimilarities of their loricae and monads organization. We specifically focused on the key features of both species that were originally used to separate one from the other: annular thickening at the base of collar and dimensions and ornamentation of loricae. Loricae of specimens were examined by light and scanning electron microscopy and the results were compared with the literature data describing these taxa and reported occurrences in the world. The species together with their varieties and forms do not appear to have strong characteristics distinguishing them, rather the variability observed fits natural phenotypic changes. Based on evidence from this study, we recommend combining these two taxa and propose T. volzii as the single taxon. We also examined a set of varieties of original T. volzii since the species contained several varieties that were almost identical in relation to lorica structure and occurrence. As a result of these observations, we propose the following varieties: Trachelomonas volzii var. volzii as a nominative variety, T. volzii var. australis, T. volzii var. sulcata, T. volzii var. inflata, T. volzii var. acidophila. Furthermore, we propose reclassifying some taxa and the new combinations such as: T. dubia var. ornata to T. volzii var. ornata and T. dubia var. colliundulata to T. volzii var. colliundulata. In our opinion, T. dubia fo. acuminata should be included with the species T. hexangulata due to its unique, hexagonal shaped lorica.


euglenoids, Euglenophyta, lorica, taxonomy, Trachelomonas dubia, T. volzii, Algae

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Alfinito, S. (2011) A check list of the freshwater algal flora of Sierra Leone, Tropical West Africa. I. Cyanophyceae to Conjugatophyceae (exclusive of Bacillariophyceae). Biodiversity Journal 2 (3): 121–144.

Alves-Da-Silva, S. & Hahn, A.T. (2001) Lista das Euglenophyta registradas em ambientes de águas continentais e costeiras do Estado do Rio Grande do Sul, Brasil. Iheringia 55: 171–188.

Begum, Z.N.T. (2009) A taxonomic account on the phytoplankton of a pond receiving textile industrial effluents. II. Euglenophyceae and Bacillariophyceae. Bangladesh Journal of Plant Taxonomy 16 (1): 9–19.

Bourrelly, P. (1961) Algues d’eau douce de la République de Côte d’Ivoire. Bulletin de ľIF.A.N. 23 (2): 283–374.

Bozzola, J.J. & Russell, L.D. (1995) Electron microscopy. Principles and techniques for biologists. Jones and Bartlett, Boston - London, 542 pp.

Caljon, A.G. (1987) Phytoplankton of a recently landlocked brackish-water lagoon of Lake Tanganyika: a systematic account. Hydrobiologia 153: 31–54.

Compère, P. (1975) Algues de la region du Lac Tchad. Cah. ORSTOM Série Hydrobiologique 9: 167–192.­

Conrad, W. (1932) Flagellates nouveaux ou peu connus. III. Archiv für Protistenkunde 78: 464–472.

Conrad, W. & Van Meel, L. (1952) Materiaux pour une monographie de Trachelomonas Ehr. 1834, Strombomonas Defl. 1930 et Euglena Ehr. 1832, geners d’Euglénacees. Bulletin de l‘Institut Royal des Sciences Naturelles de Belgique 124: 1–176.

Czosnowski, J. (1948) Matériaux à la connaissance des flagellates de la Pologne. Prace Komisji Biologicznej Poznańskiego Towarzystwa Przyjaciół Nauk 11 (4): 1–40.

Da, K.P., Mascarell, G. & Couté, A. (2009) A scanning electron microscope study of the genus Trachelomonas (Euglenophyta) in south-eastern Ivory Coast (Western Africa). Cryptogamie, Algologie 30: 31–90.

Da, K.P., Bambara, S. & N’guessan, K. (2014) Étude de quelques Trachelomonas Ehr. (Euglenophyta) nouveaux ou peu connus pour la Côte d’Ivoire. International Journal of Biologica and Chemical Sciences 8 (4): 1730–1741.

Deflandre, G. (1926) Monographie du genre Trachelomonas Ehr. Nemours, Imprimerie André Lesot, 162 pp.

Dillard, G.E. (2000) Freshwater algae of the Southeastern United States. Part 7: Pigmented Euglenophyceae. Bibliotheca Phycologica. Gebr. Borntraeger, Berlin - Stuttgart, 135 pp.

Duangjan, K., Wołowski, K. & Peerapornpisal, Y. (2012) A taxonomic and ultrastructural study of Trachelomonas spp. (Euglenophyta) from agricultural area pond, Lamphun Province. Journal of the Microscopy Society of Thailand 5 (1–2): 23–27.

Ehrenberg, C.G. (1833) Dritter Beitrag zur Erkenntnis grosser Organisation in der Richtung des kleinsten Raumes. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin 1833: 145–336.

Ersanli, E. & Gönülol, A. (2003) Study on the phytoplankton and seasonal variation of Lake Simenit (Terme – Samsun, Turkey). Turkish Journal of Fisheries and Aquatic Sciences 3: 29–39.

Fukushima, H. (1954) Trachelomonas in Japan. Journal of Yokohama Municipal University 28: 1–12.

Geissbühler, J. (1933) Grundlagen zu einer Algenflora einiger oberthurgauischer Moore. XI-XIII. Thurg. Naturf.-Ges. 29: 3–65.

Guiry, M.D. (2017) AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Available from: (accessed 28 July 2017)

Hortobágyi, T. (1963) Algen aus den Fischteichen von Buzsak V. (Fortgesetzt aus Band IV, 1–2). Nova Hedwigia 6 (1): 353–390.

Huber-Pestalozzi, G. (1955) Das Phytoplankton des Sűβwassers. 4. Teil: Euglenophyceen. Die Binnengewässer 16. E. Schweizerbart, Stuttgart, 606 pp.

INDEX NOMINUM ALGARUM, University Herbarium, University of California, Berkeley. Compiled by Paul Silva. Available from: (accessed 19 June 2018)

Islam, A.K.M.N. & Irfanullah, H. (2005) Hydrobiological studies within the tea gardens at Srimangal, Bangladesh. II. Algal flora (excluding Chlorophyceae). Bangladesh Journal of Plant Taxonomy 12 (1): 33–52.

Johansen, J.R., Lowe, R.L., Carty, S., Fučiková, K., Olsen, C.E., Fitzpatrick, M.H., Ress, J.A. & Furey, P.C. (2007) New algal species records for Great Smoky Mountains National Park, with an annotated checklist of all reported algal taxa for the Park. Southeastern Naturalist 1: 99–134.[99:NASRFG]2.0.CO;2

Kočárková, A., Wołowski, K., Poulíčková, A. & Novotný, R. (2004)Trachelomonas taxa (Euglenophyta) occurred in the pools of Poodří Protected Landscape Area (Czech Republic). Algological Studies 114: 67–84.

Kshirsagar, A.D., Ahire, M.L. & Gunale, V.R. (2012) Phytoplankton diversity related to pollution from Mula River at Pune City. Terrestrial & Aquatic Environmental Toxicology 6 (2): 136–142.

Lemmermann, E. (1906) Über die von Herrn Dr. Walter Voltz auf seiner Weltreise gesammelten Süsswasseralgen. Abhandlungen des Natunvissenschaftlichen Verein zu Bremen 18 (1): 143–174.

Linton, E.W., Karnkowska-Ishikawa, A., Kim, J.I., Shin, W., Bennet, M.S., Kwiatowski, J., Zakryś, B. & Triemer, R.E. (2010) Reconstructing euglenoid evolutionary relationships using three genes: nuclear SSU and LSU, and chloroplast SSU rDNA sequences and the description of Euglenaria gen. nov. (Euglenophyta). Protist 161: 603–619.

Montagnes, D.J.S. & Franklin, D.J. (2001) Effect of temperature on diatom volume, growth rate, and carbon and nitrogen content: Reconsidering some paradigms. Limnology and Oceanography 46 (8): 2008–2018.

Nasser, K.M.M. & Sureshkumar, S. (2014) Habitat wise variation in periphytic microalgal assemblages in the Vazhachal forest division of Chalakkudy River basin. International Journal of Current Microbiology and Applied Sciences 3 (6): 649–658.

Nayar, S., Goh, B.P.L. & Chou, L.M. (2004) Environmental impact of heavy metals from dredged and resuspended sediments on phytoplankton and bacteria assessed in in situ mesocosms. Ecotoxicology and Environmental Safety 59: 349–369.

Offem, B.O. & Ikpi, G.U. (2012) Distribution and dynamics of a tropical waterfalls ecosystem. Knowledge and Management of Aquatic Ecosystems 404: 10–25.

Oye, Van P. (1927) Le genre Trachelomonas du Congo belge. Bulletin de la Société Royale de Botanique Belgique 59 (2): 164–185.

Playfair, G.I. (1915) The genus Trachelomonas. Proceedings of the Linnean Society of New South Wales 40: 1–41.

Playfair, G.I. (1921) Australian freshwater flagellates. Proceedings of the Linnean Society of New South Wales 46: 100–145.

Poniewozik, M. (2009) Taxonomical diversity within Trachelomonas genus in a former, small clay-pit. Fragmenta Floristica et Geobotanica Polonica 16: 415–424.

Poniewozik, M. (2016) The euglenoid genus Trachelomonas (Euglenophyta) from eastern Poland. Study on morphology and ultrastructure of envelopes with comments on morphologically similar species. Phytotaxa 278 (3): 181–211.

Popova, T.G. (1951) Euglenineae of the European north of the Soviet Union. Trudy Botaniczeskoj Akademii Nauk SSSR 2 7: 165–414.

Popova, T.G. (1955) Evglenovyje vodorosli (“Euglenophyta”). Opredelitel presnovodnych vodoroslej SSSR. Izdatel’stvo “Nauka”, Moskva, 267 pp.

Popova, T.G. (1966) Flora Sporovych Rastenij SSSR (Flora plantarum cryptogamarum URSS). 8. Evglenovyje vodorosli (“Euglenophyta”). Izdatel’stvo “Nauka”, Leningrad, 412 pp.

Rhee, G.Y. & Gotham, I.J. (1981) The effect of environmental factors on phytoplankton growth: Temperature and the interactions of temperature with nutrient limitation. Limnology and Oceanography 26 (4): 635–648.

Rino, J.A. & Pereira, M.J. (1988) Euglenophyta da região centro de Portugal, 1: gênero Trachelomonas Ehr. 1833 emend. Defl. 1926. Revista de Biologia da Universidade de Aveiro 2: 129–161.

Rino, J.A. & Pereira, M.J. (1989–1990) Euglenophyta da região centro de Portugal, 2: gênero Trachelomonas Ehr. 1833 emend. Defl. 1926: estrutura da lorica em microscopia electronica de varrimento. Revista de Biologia da Universidade de Aveiro 3:139–187.

Rosowski, J.R. & Kugrens, P. (1973) Observations on the euglenoid Colacium with special reference to the formation and morphology of attachment material. Journal of Phycology 9 (4): 370–383.

Safonova, T.A. (1965) Trachelomonas in West Siberia region. Trudy Centralnego Sibir Botaniczeskogo Sada (Nowosybirsk) 10: 62–109.

Salazar, C. (2004) Pigmented Euglenophyta associated to Hymenachne amplexicaulis in aflooded tropical savanna. Acta Botánica Venezuelica 27 (2): 101–125.

Sevindik, T.O. (2010) Phytoplankton composition of Çaygören Reservoir, Balikesir-Turkey. Turkish Journal of Fisheries and Aquatic Sciences 10: 295–304.

Sevindik, T.O., Gönülol, A., Önem, B., Tunca, H. & Arabaci, S. (2015) Thirty new records for Turkish freshwater algal flora from Danamandýra Ponds (Silivri, Ýstanbul) and North Mollaköy Lake (Sakarya). Biological Diversity and Conservation 8/2: 4–15.

Shi, Z.X. & Jao, C. (1998) New taxa of eugenoids with lorica from China. Acta Hydrobiologica Sinica 22: 62–70.

Skvortsov, B.W. (1925) Die Euglenaceengattung Trachelomonas Ehr. Eine Systematische Ubersicht. Aus der Biologischen Sungari zu Harbin der Gesellschaft zur Erforschung der Mandschurei, Harbin, 101 pp.

Son, D.T. & Tung, N.T. (2013) Species composition of euglenoids belonging to the family Euglenaceae from Lak lake, Dak Lak province. Tap Chí Sinh Hoc 35 (3): 313–319.

Starmach, K. (1983) Euglenophyta – Eugleniny. Flora Słodkowodna Polski. Part 3. Państwowe Wydawnictwo Naukowe, Warszawa – Kraków, 595 pp.

Stein, J.R. (1975) Freshwater algae of British Colombia the Lower Fraser Valley. Syesis 8: 119–184.

Svirenko, D.O. (1914) Zur Kenntnis der russischen Algenflora 1. Die Euglenaceengattung Trachelomonas. Archiv für Hydrobiologie Plankton 9: 630–647.

Szabados, M. (1939) Szentmihálytelek “Holt-Tisza” ágának Flagellata-vegetációja. In: Gombcz, E. & Lengyel, G. (Eds.) Botanikai Közlemények. Kiadja a Kir Magyar Természettudományi Tarsulat, Budapest, pp. 109–119.

Vetrova, Z.I. (1993) Flora vodoroslej kontinentalnich vodoemov Ukrainskoj SSR. Evglenofitovyje vodorosli, Vypusk 1, Part 2. Izdatel’stwo Naukova Dumka, Kiiv, 259 pp.

Vijayan, D. & Ray, J.G. (2015) Green algae of a unique tropical wetland, Kuttanadu, Kerala, India, in relation to soil regions, seasons, and paddy growth stages. International Journal of Environmental Science and Technology 4 (3): 770–803.

Wang, C.C. & Nie, D.S. (1934) Notes on Trachelomonas of Nanking. Sinensia 5: 122–146.

Wołowski, K. (1998) Taxonomic and environmental studies on euglenophytes of the Kraków-Częstochowa Upland (Southern Poland). Fragmenta Floristica et Geobotanica Polonica 6: 1–192.

Wołowski, K. (2012) Euglenophytes from a fishpond in the Republic of Cameroon (West-Central Africa). In: Wołowski, K., Kaczmarska, I., Ehrman, J.M. & Wojtal, A.Z. (Eds.) Current advances in algal taxonomy and its applications: phylogenetic, ecological and applied perspective. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, pp. 175–183.

Wołowski, K. & Grabowska, M. (2007) Trachelomonas species as the main component of the euglenophytes community in the Siemianówka Reservoir (Narew River, Poland). Annales de Limnologie – International Journal of Limnology 43: 207–218.

Wołowski, K. & Walne, P.L. (2007) Strombomonas and Trachelomonas species (Euglenophyta) from south-eastern USA. European Journal of Phycology 42 (4): 409–431.

Woodhead, N. & Tweed, R.D. (1958) Freshwater algae of Sierra Leone. Hydrobiologia 12: 181–225.

Yamagishi, T. (1992) Plankton algae in Taiwan (Formosa). Uchida Rokakuho, Tokyo, 252 pp.

Yamagishi, T. (2010) Plankton Algae of Southeast Asia. Bishen Singh Mahendra Pal Singh Dehra Dan, 249 pp.


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