160,213 species and infraspecific names are in the database, 22,604 images, 62,301 bibliographic items, 471,479 distributional records.

Cyclostephanos dubius (Hustedt) Round 1988

Publication details
Cyclostephanos dubius (Hustedt) Round in Theriot & al. 1988: 346

Published in: Theriot, E., Håkansson, H., Kociolek, J.P., Round, F.E. & Stoermer, E.F. (1988 '1987'). Validation of the centric diatom genus name Cyclostephanos. British Phycological Journal 22(4): 345-347.
 Download PDF

Type species
The type species (lectotype) of the genus Cyclostephanos is Cyclostephanos novae-zeelandiae (Cleve) Round.

Status of name
This name is of an entity that is currently accepted taxonomically.

Stephanodiscus dubius Hustedt

Type information
Type locality: Ukraine: Crimea (Cyclotella dubia Fricke) (Index Nominum Algarum). Notes: As the figs [of Cyclotella dubia] provided by Fricke show detailed morphological features that make a certain identification of the species possible, Taf. 222 fig. 23 (in Schmidt et al., 1874-1959 is designated as type but since it is not obvious whether or not this fig. is "original material' as defined in Art.9, Note 2, it is uncertain whether this should be designated as a lectotype or neotype (H.Håkansson, 2002: 7, fig. 5, arrowed).

Origin of species name
Adjective (Latin), doubtful.

Homotypic Synonym(s)
Stephanodiscus dubius Hustedt 1928

Heterotypic Synonym(s)
Cyclotella dubia Fricke 1900

Nomenclatural notes
Cyclotella dubius Fricke in Schmidt et al. 1900: pl. 222: figs 23, 24, the proposed basionym is an illegitimate name, and the name Stephanodiscus dubius Hustedt (1928: 367, fig. 192) has been adopted here as the basionym. - (20 Apr 2010) - M.D. Guiry

Based on Cyclostephanos dubius (Fricke) Round, 1982: 326 (invalid name, genus name invalid at time of transfer) (Theriot et al., 1988: 346). - (31 Oct 2014) - Wendy Guiry

(Fricke) Round is cited as the authority in Olszynski & Zelazna-Wieczorek (2018), - (9 Sep 2019) - Wendy Guiry

General environment
This is a freshwater species.

Detailed distribution with sources (Click to Load)

Key references
Aboal, M., Álvarez Cobelas, M., Cambra, J. & Ector, L. (2003). Floristic list of non-marine diatoms (Bacillariophyceae) of Iberian Peninsula, Balearic Islands and Canary Islands. Updated taxonomy and bibliography. Diatom Monographs 4: 1-639.

Bąk, M., Witkowski, A., Zelazna-Wieczorek, J., Wojtal, A.Z., Szczepocka , E., Szulc, A. & Szulc, B. (2012). Klucz do oznaczania okrzemek w fitobentosie na potrzeby oceny stanu ekologicznego wód powierzchniowych w Polsce Biblioteka Monitoringu Srodowiska. pp. 1-452. Warszawa [Warsaw]: Glowny Inspektorat Ochrony Srodowiska.

Chudaev, D.A. & Gololobova, M.A. (2016). [Diatoms of the Glubokoe lake (Moscow region)]. pp. [1]-446, 266 pls. Moscow. [in Russian]

Edlund, M.B., Williams, R.M. & Soninkhishig, N. (2003). The planktonic diatom diversity of ancient Lake Hovsgol, Mongolia. Phycologia 42: 232-260.

Genkal, S.I. & Kulumbaeva, A.A. (1990). [About diatom algae (Centrophyceae) of Lake Song-Kyol (Western Tyan-Shan)]. Biologiia Vnutrennikh Vod Informatsii Biulleten 86: 21-25, 2 pls. [in Russian and Latin]

Hickel, B. & Hakansson, H. (1987). Dimorphism in Cyclostephanos dubius (Bacillariophyta) and the Morphology of Initial Valves. Diatom Research 2(1): 35-46.

Houk, V., Klee, R. & Tanaka, H. (2014). Atlas of freshwater centric diatoms with a brief key and descriptions. Part IV. Stepahnodiscaceae B. Stephanodiscus, Cyclostephanos, Pliocaenicus, Hemistephanos, Stephanocostis, Mesodictyon & Spicaticribra. Fottea (Supplement) 14: 1-530.

Håkansson, H. (2002). A compilation and evaluation of species in the genera ["general"] Stephanodiscus, Cyclostephanos and Cyclotella with a new genus in the family Stephanodiscaceae. Diatom Research 17(1): 1-139, 487 figs.

Joh, G. (2010). Algal flora of Korea. Volume 3, Number 1. Chrysophyta: Bacillariophyceae: Centrales. Freshwater diatoms I. pp. [1-6], 1-161, figs 1-105. Incheon: National Institute of Biological Resources.

John, J. (2020). Diatoms from arid Australia: taxonomy and biogeography. The diatom flora of Australia Volume 3. pp. [1]-578, 341 figs. Schmitten – Oberreifenberg: Koeltz Botanical Books.

Kasten J., Kusber W.-H., Riedmüller U., Tworeck A., Oschwald L. & Mischke U. (2018). Steckbriefe der Phytoplankton-Indikatortaxa in den WRRL Bewertungsverfahren PhytoSee und PhytoFluss mit Begleittext – 1. Lieferung: 50 Steckbriefe ausgewählter Indikatortaxa. pp. 1-177. Berlin: Botanic Garden and Botanical Museum Berlin, Freie Universität Berlin.

Khursevich, G. & Kociolek, J.P. (2012). A preliminary, worldwide inventory of the extinct, freshwater fossil diatoms from the orders Thalassiosirales, Stephanodiscales, Paraliales, Aulacoseirales, Melosirales, Coscinodiscales, and Biddulphiales. Nova Hedwigia Beiheft 141: 315-364, no figs.

Kobayashi, H., Idei, M., Mayama, S., Nagumo, T. & Osada, K. (2006). Kobayashi hiromu keiso zukan. H.Kobayasi's atlas of Japanese diatoms based on electron microscopy. dai 1kan. pp. [1]-531, 180 pls. Tokyo: Uchida Rokakuho Publishing Co., Ltd. [in Japanese]

Kulikovskiy, M., Glushchenko, A.M., Kuznetsova, I.V. & Genkal, S.I. (2016). [Identification book of diatoms from Russia]. pp. [1]-804, 165 pls. Yaroslavl: Filigran. [in Russian]

Maidana, N.I., Aponte, G.A., Fey, M., Schäbitz, F. & Morales, E.A. (2017). Cyclostepanos salsae and Placoneis patagonica, two new diatoms (Bacillariophyta) from Laguna Cháltel in southern Patgonia, Argentina. Nova Hedwigia Beiheft 146: 89-102, 42 figs.

Mandal, M., Zelazna-Wieczorek, J. & Sarkar, N.S. (2020). New diatom taxa for the Indian Sundarbans found in short sediment cores. Diatom Research 35(1): [1-18] 17-35.

Olszynski, R.M. & Zelazna-Wieczorek, J. (2018). Aulacoseira pseudomuzzanensis sp. nov. and other centric diatoms from post iron ore mining reservoirs in poland. Diatom Research 33(2): 155-185.

Plinski, M. & Witkowski, A. (2020). Diatoms from the Gulf of Gdansk and surrounding waters (the southern Baltic Sea). : [1]-442, incl. 31 SEM pls, 16 photo pls.

Qi, Y.Z. (1995). Flora algarum sinicarum aquae dulcis. Tomus IV Bacillariophyta Centicae. pp. [i-viii], i-v, 1-104, 9 pls. Beijing: Science Press. [in Chinese with some English keys]

Reavie, E.D. & Kireta, A.R. (2015). Centric, araphid and eunotioid diatoms of the coastal Laurentian Great Lakes. Sampling, taxonomic descriptions and environmental characteristics. Bibliotheca Diatomologica 62: [1]-184, 49 pls.

Reichardt, E. (2018). Die Diatomeen im Gebiet der Stadt Treuchtlingen. pp. [1]-576 (Band 1); 579-1184 (Band 2), incl 451 pls. München: Bayerische Botanische Gesellschaft [Selbstverlag der Gesellschaft].

Round, F.E. (1982). Cyclostephanos - a new genus within the Skeletonemataceae. Arch. Prostistenk. 125: 323-329.

Sims, P.A. (ed.) (1996). An atlas of British diatoms arranged by B. Hartley based on illustrations by H.G. Barber and J.R. Carter. pp. [2], 1-601, incl. 290 pls. Bristol: Biopress Ltd.

Solak, C.N. & Kulikovskiy, M. (2013). Species composition and distribution of centric diatoms from Türkmen Mountain (Sakarya River Basin/Turkey). Turkish Journal of Botany 37: 589-596.

Tuji, A. (2016). Algae aquae dulcis Japonicae exsiccatae. Fascile [sic] VII. Nos. 121-140. pp. 1-42. Tsukuba: National Museum of Nature and Science.

Villac, M.C., Kaczmarska, I. & Ehrman, J.M. (2016). Diatoms from ship ballast sediments (with consideration of a few additional species of special interest). Diatom Monographs 18: [1]-557, 235 pls.

Weckstrom, K. & Juggins, S. (2006). Coastal diatom-environment relationships from the Gulf of Finland, Baltic Sea. Journal of Phycology 42: 21-35.

Created: 11 April 2002 by M.D. Guiry

Verified by: 03 March 2021 by M.D. Guiry

Accesses: This record has been accessed by users 2422 times since it was created.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Bradshaw, E.G. & Anderson, N.J. (2003). Environmental factors that control the abundance of Cyclostephanos dubius (Bacillariophyceae) in Danish lakes, from seasonal to century scale. European Journal of Phycology 38: 265-276.
Hickel, B. & Hakansson, H. (1987). Dimorphism in Cyclostephanos dubius (Bacillariophyta) and the Morphology of Initial Valves. Diatom Research 2(1): 35-46.

Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=32965

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 07 March 2021.

SITE © 1996 - 2021 M.D. Guiry. All rights reserved.

Website Design : 249 Design Studio