Diatoms of the Wyżyna Krakowsko-Czestochowska Upland (S Poland) - Coscinodiscophyceae (Thalassiosirophycidae)

Polish Botanical Journal

Volumn 51, Issue 2, 2006, Pages 177-207

  Wojtal, Agata Zofia ^a   Kwandrans, Janina ^b  

^a W SZAFER INSTITUTE OF BOTANY   (Poland)

^b INSTITUTE OF NATURE CONSERVATION   (Poland)

Author keywords

Bacillariophyta; Centrales; Distribution; Ecology; Running waters; Springs; Taxonomy

Indexed keywords

DIATOM; NEW SPECIES; PLANT; SPATIAL DISTRIBUTION; TAXONOMY;

CENTRAL EUROPE; EURASIA; EUROPE; POLAND;

BACILLARIOPHYTA; COSCINODISCOPHYCEAE; CYCLOSTEPHANOS DELICATUS; CYCLOTELLA DELICATULA; SKELETONEMA POTAMOS; THALASSIOSIRA; THALASSIOSIRA GUILLARDII; THALASSIOSIROPHYCIDAE;

EID: 35748942593     PISSN: 16418190     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (103)

1. BARBIERO R. P. & TUCHMAN M. L. 2004. The deep chlorophyll maximum in Lake Superior. Journal of Great Lakes Research 30(Suppl. 1): 256-268.
2. BAK M., WITKOWSKI A. & LANGE-BERTALOT H. 2006. Diatom flora diversity in the strongly eutrophicated and β-mesosaprobic waters of the Szczecin Lagoon, NW Poland, southern Baltic Sea. In: N. OGNIANOVA-RUMENOVA & K. MANYLOV (eds), Advances in Phycological studies, Festschrift in Honour of Prof. Dobrina Teminskova-Topalova, pp. 293-317. Pensoft Publishers & University Publishing House, Sofia - Moscow.
3. BESZTERI B., ACS E. & MEDLIN L. 2005. Conventional and geometric morphometric studies of value ultrastructural variation in two closely related Cyclotella species (Bacillariophyta). Eur. J. Phycol. 40(1): 89-103.
4. BIŃKA K., MARCINIAK B. & ZIEMBIŃSKA-TWORZYDŁO M. 1988. Palynologic and diatomologic analysis of the Masovian Interglacial deposits in Adamówka (Sandomierz Lowland). Kwartalnik Geologiczny 31: 453-474.
5. BOGACZEWICS-ADAMCZAK B. 1988. Diatomcen aus den Sedimenten von Dziekanowice (kurze Information). Acta Palaeobot. 28: 56-58.
6. BUCKA H. 2000. Diversity of flora and fauna in running waters of the Province of Cracow (southern Poland) in relation to water quality. 6. Characteristics of rivers on the basis of phytoseston communities. Acta Hydrobiol. 42(3/4): 95-122.
7. BUCKA H. & WILK-WOŹNIAK E. 2002. A monograph of cosmopolitan and ubiquitous species among pro- and eukaryotic alga from water bodies in southern Poland. Zakład Biologii Wód im. K. Starmacha PAN, Kraków (in Polish).
8. CABAŁA J. 2002. Chrysophyceae stomatocysts from Budzyń peat bog (Kraków-Czestochowa Upland, Poland). Polish Bot. J. 47(1): 21-35.
9. CASPER J. & SCHEFFLER W. 1990. Cyclostephanos delicatus (Genkal) Casper et Scheffler comb. nov. from waters in the northern part of Germany. Arch. Protistenk. 138: 304-312.
10. CIEŚLA A. & MARCINIAK B. 1982. Development of Late Glacial lacustrine deposits at Niechorze (Western Pomerania) in the light of diatomological and geochemical data. Kwartalnik Geologiczny 26: 191-215 (in Polish).
11. CREMER H., WAGNER B., JUSCHUS O. & MELLES M. 2005. A microscopical study of diatom phytoplankton in deep crater Lake El'gygytgyn, Northeast Siberia. Algol. Stud. 116: 147-169.
12. DENYS L. 1991. A check-list of the diatoms in the Holocene deposits of the western Belgian coastal plain with a survey of their apparent ecological requirements. I. Introduction, ecological code and complete list. Professional Papers of the Geological Survey of Belgium 246: 1-41.
13. DRESSLER M. & HÜBENER T. 2006. Morphology and ecology of Cyclostephanos delicatus (Genkal) Casper et Scheffler (Bacillariophyceae) in comparison with C. tholiformis Stoermer, Hakanssson & Theriot. Nova Hedwigia 82 (3-4): 409-434.
14. DUMNICKA E. 1998. Habitat preferences of invertebrate (especially Oligochaeta) in a stream. Acta Hydrobiol. 36: 91-101.
15. DUMNICKA E. 2002. Upper Vistula River: response of aquatic communities to pollution and impoundment. X Oligochaete taxocens. Polish Journal of Ecology 50(2): 237-247.
16. DYNOWSKA I. 1983. Springs within the Upland of Cracow-Wieluń and Miechów. Studia Ośrodka Dokumentacji Fizjograficznej 11: 1-244 (in Polish with English summary).
17. EDLER L., HÄLLFROS G. & NIEMI Å. 1984. A preliminary check-list of the phytoplankton of the Baltic Sea. Acta Bot. Fenn. 128: 1-26.
18. EHRENBERG C. G. 1845. Vorld̈fige zweite Mittheilung über die weitere Erknntnis der Beziehgen des kleinsten Lebens zu den vukanisischen Massen der Erde. Ber Akad. Wiss. Berlin. (1845): 133-157.
19. FRITZ S. C., KINGSTONE J. C. & ENGSTROM D. R. 1993. Quantitative trophic reconstraction from sedimentary diatom assemblages: a cautionary tale. Freshwater Biology 30: 1-23.
20. GEISSLER U. 1986. Experimental investigations of the variability of frustule characteristics of several freshwater diatoms. 2. The influence of different salt concentrations on some valve structures of Stephanodiscus hantzschii Grunow. In: M. RICARD (ed.), Proceedings of the 8th International Diatom Symposium, Paris, August 27 - September 1, 1984, pp. 59-66. Koeltz Scientific Books, Koeningstein.
21. GENKAL S. I. 1977. On the method of calculation of some taxonomically significant structural elements of the valve in the diatoms of the family Thalassiosiraceae Lebour emend Hasle (Bacillariophyta). Bot. Zhurn. 62: 848-851 (in Russian).
22. GENKAL S. I. 1992. Atlas of plankton diatoms of the Volga river. Gidrometeoizdat, Sankt Petersburg (in Russian).
23. GENKAL S. I. 1993. Large-celled undulate species of the genus Stephanodiscus Ehr. in USSR reservoirs: morphology, ecology and distribution. Diatom Res. 8(1): 45-64.
24. GENKAL S. I. & HÅKANSSON H. 1990. The problem of distinguishing the newly described diatom genus Pseudostephanodiscus. Diatom Res. 5(1): 15-23.
25. GENKAL S. I. & STENINA A. S. 2005. Interesting records of centric diatoms in reservoirs of the Malozemelskaya Tundra (Russia). International Journal on Algae 7(4): 363-373.
26. GUTWIŃSKI R. 1895. Prodromus florae algarum Galiciensis. Rozpr. Akad. Umiejetn., Wydz. Mat.-Przyr. 28: 274-449.
27. HÅKANSSON H. 2002. A compilation and evaluation of species in the genera Stephanodiscus, Cyclostephanos and Cyclotella with a new genus in the family Stephanodiscaceae. Diatom Res. 17: 1-139.
28. HÅKANSSON H. & CHEPURNOV V. 1999. A study of variation in valve morphology of the diatom Cyclotella meneghiniana in monoclonal cultures: effect of auxospore formation and different salinity conditions. Diatom Res. 14(2): 251-272.
29. HÅKANSSON H. & CLARKE K. B. 1997. Morphology and taxonomy of the centric diatom Cyclotella atomus. Nova Hedwigia 65 (1-4): 207-220.
30. HÅKANSSON H. & KLING H. 1989. A light and electron microscope study previously described and new Stephanodiscus species (Bacillariophyceae) from Central and Northern Canadian Lakes, with ecological notes on the species. Diatom Res. 4(2): 269-288.
31. HÅKANSSON H. & STOERMER E. F. 1984. Observations on the Type Material of Stephanodiscus hantzschii Grunow in Cleve & Grunow. Nowa Hedwigia 39: 477-495.
32. HASLE G. R. 1978. Some freshwater and brackish water species of the diatom genus Thalassiosira Cleve. Phycologia 17:263-292.
33. HASLE G. R. & HEIMDAL B. R. 1970. Some species of the centric diatom genus Thalassiosira studied in the ligth and electron microscopes. Beih. Nova Hedwigia 31: 559-581.
34. HAUSMANN S. & LOTTER A. F. 2002. Morphological variation within the diatom taxon Cyclotella comensis and its importance for qualitative temperature reconstructions. Freshwater Biology 46: 1323-1333.
35. HEGEWALD E. & HINDÁKOVÁ A. 1997. Variabilität von einer natürlichen Population und von Klonen des Cyclotella ocellata-Komplexes (Bacillariophyceae) aus dem Gallbergweiher, Noerdwestdeutschland. Algol. Stud. 86: 17-37.
36. HOJDA K. 1971. Diatoms of the upper course of the stream Sanka (Cracow-Czestochowa Upland). Fragm. Florist. Geobot. 17(3): 445-454 (in Polish with English summary).
37. HOUK V. & KLEE R. 2004. The stelligerioid taxa of the genus Cyclotella (Kützing) Brébisson (Bacillariophyceae) and their transfer into the new genus Discostella gen. nov. Diatom Res. 19(2): 203-228.
38. HÜBENER T. 1999. Morphology and ultrastructure of a population of Cyclotella woltereckii Hustedt (Bacillariophyceae) in Northern Germany. Nova Hedwigia 68(3-4): 469-476.
39. HUSTEDT F. 1942. Sd̈ßwasser-Diatomeen des indomalayischen Archipels und der Hawai-Inseln. Nach dem Material der Wallacea-Expedition. Int. Rev. Ges. Hydrobiol. Hydrogr. 42: 1-252.
40. HUSTEDT F. 1948. Die Diatomeenflora diluvialer Sedimente bei dem Dorfe Gaj bei Konin im Warthegebiet. Schweizerische Zeitschrift für Hydrolgie 11(1/2): 181-209.
41. KACSMARSKA I. 1976. Diatom analysis of Eemian profile in fresh-water deposits at Imbramowice near Wrocław. Acta Palaeobot. 17: 3-34.
42. KACZMARSKA I. 1977. Comments on the flora of diatoms (Bacillariophyceae) from Eemian freshwater sediments at Imbramowice near Wrocław. Acta Palaeobot. 18: 35-60.
43. KADŁUBOWSKA J. Z. 1964. Diatoms of the river Pilica and their importance in the water pollution evaluation. Part II. Microflora of the river Pilica. Zeszyty Naukowe Uniwersytetu Łódzkiego 2(16): 93-150.
44. KATO M., TANIMURA Y., FUKOSAWA H. & YASUDA Y. 2003. Intraspecific variation during the life cycle of a modern Stephanodiscus species (Bacillariophyceae) inferred from the fossil record of Lake Suigetsu, Japan. Phycologia 42(3): 292-300.
45. KAWECKA B. & KWANDRANS J. 2000. Diversity of flora and fauna in running waters of the Province of Cracow (southern Poland) in relation to water quality. 3. Benthic cyanobacteria and algae communities. Acta Hydrobiol. 42(3/4): 145-173.
46. KHARITONOV V. G. 2005. Members of the Centrales (Bacillariophyta) in waterbodies of Beringia. Bot. Zhurn. 90(3): 336-350 (in Russian).
47. KISS K. T. 1984. Species of the Thalassiosiraceae in Budapest Section of the Danube. Comparison of samples collected in 1956-63 and 1979-83. In: M. RICARD (ed.), Proceedings of the 8th International Diatom Symposium, Paris, August 27 - September 1, 1984, pp. 23-31. Koeltz Scientific Books, Koeningstein.
48. KISS K. T. & PAJAK G. 1994. Seasonal changes of diatoms in the plankton of the Vistula River, above and below the Goczałkowice Reservoir, Poland. In: P. KOCIOLEK (ed.), Proceedings of the 11th International Diatom Symposium. Memoirs of the California Academy of Sciences 17: 583-597.
49. KISS K. T., ÁCS É & KOVÁCS A. 1994. Ecological observation on Skeletonema potamos (Weber) Hasle in the River Danube, near Budapest (1991-1992, daily investigations). Hydrobiologia 289(1-3): 163-170.
50. KISS K. T., ÁCS É, ECTOR L., MIRACLE R. M., MORATA S. M., VINCENTE, E. & CAMBRA J. 2005. Investigation of centric diatoms from Iberian rivers and lakes Hungarian Algological Meeting 23-27 May 2005, Abstracts. http://falco.elte.hu/ALGA/alga/ 15HAMabstracts.htm.
51. KLEE R. & CASPER J. 1997. Once more: Kützing's Type Material of Stephanodiscus minutulus (Kütz.) Grunow (Bacillariophyceae) from "Lüneburg" - a Reinvestigation. Arch. Protistenk. 148: 53-63.
52. KLEE R. & HOUK V. 1996. Morphology and Ultrastructure of Cyclotella woltereckii Hustedt (Bacillariophyceae). Arch. Protistenk. 147: 19-27.
53. KLING H. & HÅKANSSON H. 1988. A light and electron microscope study of Cyclotella species (Bacillariophyceae) from central and northern Canadian Lakes. Diatom Res. 3(1): 55-82.
54. KLONOWSKA M. 1996. The food of some mayfly (Ephemeroptera) nymphs from the stream of the Kraków-Czestochowa Jura (Southern Poland). Acta Hydrobiol. 28(1/2): 181-197.
55. KOBAYASI H., KOBAYASHI H. & IDEI M. 1985. Fine structure and taxonomy of the small and tiny Stephanodiscus Bacillariophyceae) species in Japan 3. Co-occurrence of Stephanodiscus minutulus (Kütz.) Round and S. parvus Stoermer & Hakansson. Jap. J. Phycol. 33(4): 293-300.
56. KONDRACKI J. 1994. Geografia fizyczna Polski. Państwowe Wydawnictwo Naukowe, Warszawa.
57. KONDRACKI J. 2000. Geografia regionalna Polski. Państwowe Wydawnictwo Naukowe, Warszawa.
58. KRAMMER K. & LANGE-BERTALOT H. 1986. Bacillariophyceae. 1. Naviculaceae. In: H. ETTL, J. GERLOFF, H. HEYNING & D. MOLLENHAUER (eds), Süßwasserflora von Mitteleuropa 2(1). G. Fischer Verlag, Stuttgart - New York.
59. KRAMMER K. & LANGE-BERTALOT H. 1991. Bacillariophyceae. 3. Centrales, Fragilariaceae, Eunotiacae. In: H. ETTL, G. GÄRTNER, J. GERLOFF, H., HEYNING & D. MOLLENHAUER (eds), Süßwasserflora von Mitteleuropa 2(3). Gustav Fischer Verlag, Stuttgart - Jena.
60. KUBIK B. 1970. The occurrence of Bacillariophyceae in three springs of Bedkówka stream (Cracow-Czestochowa Jurassic region) Southern Poland. Fragm. Florist. Geobot. 16: 549-561 (in Polish with English summary).
61. KWANDRANS J. & WOJTAL A. 2006. Classification of water valuation of rivers. In: R. ZUREK (ed.), Ichthyofauna and ecological status of Vistula, Raba, Dunajec and Wisłoka Rivers, pp. 158-192. Institute of Nature Conservation, Polish Academy of Sciences, Kraków (in Polish).
62. KWANDRANS J., ELORANTA P., KAWECKA B. & WOJTAN K. 1998. Use of benthic diatom communities to evaluate water quality in rivers of southern Poland. Journal of Applied Phycology 10: 193-201.
63. MARCINIAK B. 1973. The application of the diatomological analysis in the stratigraphy of the late glacial deposits of the Mikołajskie Lake. Studia Geologica Polonica 39: 1-157.
64. MARCINIAK B. 1979. Dominant diatoms from Late Glacial and Holocene lacustrine sediments in Northern Poland. Beih. Nova Hedwigia 64: 411-426.
65. MEDIOLI B. E. & BROOKS G. R. 2003. Diatom and thecamoebian signatures of Red River (Manitoba and North Dakota) floods: Data collected from the 1997 and 1999 spring freshets. Journal of Paleolimnology 29: 353-386.
66. MEYER B. & H. HÅKANSSON 1997. Cyclotella wulfiae, a new diatom from a brackish lake in Germany. Diatom Res. 12: 279-285.
67. NAWRAT B. 1993. Autumn-winter diatoms settled on Vaucheria filaments in Kluczwoda stream near Cracow. Fragm. Florist. Geobot. 38(2): 715-736 (in Polish with English summary).
68. PATRICK R. & ROBERTS N. A. 1979. Diatom communities in the Middle Atlantic States, U.S.A. Beih. Nova Hedwigia 64: 265-283.
69. PIENAAR C. & PIETERSE A. J. H. 1990. Thalassiosira duostra sp. nov., a new freshwater centric diatom from the Vaal River, South Africa. Diatom Res. 5(1): 105-111.
70. PLIŃSKI M. 1979. Kierunki zmian strukturalnych w fitoplanktonic estuariów Bałtyku południowego. Zeszyty Naukowe, Rozprawy i Monografie, Uniwersytet Gdański 15: 1-136.
71. POPOVSKAYA G. I., GENKAL S. I. & LIKHOSHWAY E. V. 2002. Diatoms of the plankton of Lake Baikal. Atlas and key. Nauka, Novosibirsk (in Russian).
72. PRYGIEL J. & COSTE M. 2000. Guide Méthodologique pour la mise en oeuvre de l'Indice Biologique Diatomées. NF T 90-354. Etude Agences de l'Eau-Cemagref Bordeaux, March 2000, Agences de l'Eau.
73. PUDO J. 1977. Periphyton of the river Vistula in the region of heated water discharges from the power plant at Skawina. Acta Hydrobiol. 19(2): 123-143.
74. RACIBORSKI M. 1888. Materyjały do flory glonów Polski. Spraw. Komis. Fizjogr. 22: 80-122.
75. RAKOWSKA B. 1984. Algae of the River Rawka. Acta Univ. Lodzi., Folia Bot. 3: 283-320 (in Polish with English summary).
76. RAKOWSKA B. 1996. The benthic diatom community of a reservoir after the exploitation of brown coal in Konin (Central Poland). Algol. Stud. 82: 103-106.
77. RAKOWSKA B. 2001, Study on diatom diversity in water ecosystems of Polish Lowlands. Wydawnictwo Uniwersytetu Łódzkiego, Łódź (in Polish with English summary).
78. RINGER Z. 1966. Borders of occurrence of plant species depending on salinity according to Polish investigations in the southern Baltic and in the Firths of Vistula and Szczecin. International Councilfor the Exploration of the Sea, Baltic-Belt Seas Committee 3: 1-7.
79. SABATER S. & KLEE R. 1990. Observations on centric diatoms of the river Ebro phytoplankton, with special interest on some small Cyclotella. Diatom Res. 5(1): 141-154.
80. SCHEFFLER W., HOUK V. & R. KLEE 2003. Morphology, morphological variability and ultrastructure of Cyclotella delicatula Hustedt (Bacillariophyceae) from Hustedt material. Diatom Res. 18: 107-121.
81. SIEMIŃSKA J. 1947. The winter flora of diatoms in the ponds of the Fishery Experimental Station of the Jagiellonian University at Mydlniki by Cracow. Arch. Hydrobiol. Rybactwa 13: 181-220 (in Polish with English summary).
82. SIEMIŃSKA J. & WOŁOWSKI K. 2004. Catalogue of Polish procaryotic and eukaryotic algae. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków.
83. SIVER A., HAMILTON P. B., STACHURA-SUCHOPLES K. & KOCIOLEK J. P. 2005, Diatoms of North America: The Freshwater Flora of Cape Cod, Massachusetts, U.S.A. In: H. LANGE-BERTALOT (ed.), Iconographia Diatomologica. Annotated Diatom Iconographs 14: 1-463. A.R.G. Gantner Verlag Kommanditgesellschaft, Ruggell.
84. SKALNA E. 1969. The occurrence of Bacillariophyceae in three springs of Kobylanka stream (Cracow-Czştochowa Jurassic region). Fragm. Florist. Geobot. 15(2): 245-254 (in Polish with English summary).
85. STOERMER E. F. & YANG J. J. 1970. Distribution and Relative Abundance of Dominant Plankton Diatoms in Lake Michigan. Great Lakes Research Division, Institute of Science and Technology, University of Michigan, Ann Arbor, M, GLRD Special Report 16: 1-64.
86. STOERMER E. F., HÅKANSSON H. & THERIOT E. 1987. Cyclostephanos species newly reported from North America: C. thioliformis sp. nov. and C. costatilimbus comb. nov. Brit. Phycol. J. 22: 349-358.
87. STOERMER E. F., KREIS R. G. JR. & ANDRESEN N. A. 1999. Checklist of diatoms from the Laurentian Great lakes. II. Journal of Great Lakes Research 25: 515-566.
88. THERIOT E., STOERMER E. F. & HÅKANSSON H. 1987 Taxonomic interpretation of the rimoportula of freshwater genera in the centric diatom family Thalassiosiraceae. Diatom Res. 2(2): 251-265.
89. TORGAN L. C., VIEIRA A. H., GIROLDO D. & DOS SANTOS C. B. 2006. Morphological irregularity and small cell size in Thalassiosira duostra maintained in culture. In: A. WITKOWSKI (ed.), Proceedings of 18th International Diatom Symposium 2004 Miȩdzyzdroje, Poland. Biopress Ltd., Bristol (in press).
90. TRIFONOVA I. & GENKAL S. 2006. Planktonic diatoms of the Order Thalassisirales Glezer et Makarova (Centrophyceae) from Lake Ladoga, its tributaries, and some lakes in its catchment. In: A. WITKOWSKI (ed.), Proceedings of 18th International Diatom Symposium 2004 Miḑzyzdroje, Poland. Biopress Ltd., Bristol (in press).
91. TUROBOYSKI L. 1962. Einführende Untersuchungen über das Vorkommen von Kieselalgen in der Wisła in Kraków. Ekol. Polska, Ser. A 10(9): 273-284 (in Polish with German summary).
92. VAN DAM H., MERTENS A. & SINKELDAM J. 1994. A coded checklist and ecological indicator values of freshwater diatoms from the Netherlands. Netherlands Journal of Aquatic Ecology 28: 117-133.
93. VAN HEURCK H. 1880-1887. Synopsis des Diatomées de Belgique. Texte, Atlas. Ducaju and Cie., Anvers.
94. WILK-WOŹNIAK E. & LIGEZA S. 2003. Phytoplankton-nutrient relationships during the early spring and the late autumn in a shallow and polluted reservoir. Oceanological and Hydrobiological Studies 32(1): 75-87.
95. WOJTAL A. 2001. New or rare species of the genus Navicula (Bacillariophyceae) in the diatom flora of Poland. Polish Bot. J. 46(2): 161-167.
96. WOJTAL A. 2003a. Diatoms of the genus Gomphonema from karstic stream in the Kraków-Czȩstochowa Upland. Acta Soc. Bot. Poloniae 73(3): 213-220.
97. WOJTAL A. 2003b. Diatoms of the families Amphipleuraceae and Brachysiraceae from the Kraków-Czȩstochowa Upland (S Poland). Polish Bot. J. 48(1): 55-61.
98. WOJTAL A. 2004. New or rare species of the genera Achnanthidium and Psammothidium (Bacillariophyceae) in the diatom flora of Poland. Polish Bot. J. 49(2): 215-220.
99. WOJTAL A. & SOBCZYK Ł. 2006. Composition and structure of epilithic diatom assemblages in a hardwater stream (S Poland). Algol. Stud. 119: 105-125.
100. WOJTAL A., WOŹNIAK-WILK E. & BUCKA H. 2005, Diatoms (Bacillariophyceae) of the transitory zone of Wolnica Bay (Dobczyce dam reservoir) and Zakliczanka stream (Southern Poland). Algol. Stud. 115: 1-35.
101. WOŁOWSKI K. 1998. Taxonomic and environmental studies on Euglenophytes of the Kraków-Czȩstochowa Upland (Southern Poland). W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków.
102. WUNSAM S., SCHMIDT R. & KLEE R. 1995. Cyclotella-taxa (Bacillariophyceae) in lakes of the Alpine region and their relationship to environmental variables. Aquatic Sciences 57(4): 360-386.
103. YANG J. R. & DUTHIE H. C. 1993. Morphology and ultrastructure of tertological forms of the diatoms Stephanodiscus niagarae and S. parvus (Bacillariophyceae) from Hamilton Harbour (Lake Ontario, Canada). Hydrobiologia 269/270: 57-66.