Examination of the type materials ofNavicula subtilissima Cleve (Bacillariophyceae)

  • Hiromu Kobayasi
  • Tamotsu Nagumo
Article

Abstract

Navicula subtilissima was described by Cleve as a new species from ‘a dry rivulet at the shore of Imandra, at the foot of Chibinä, Lapland’. However, the examination of the type slides and the unmounted original material using transmission and scanning electron microscopy revealed that there are at least three finely striated similar taxa distinguishable at the specific level. From these taxa, application of the nameN. subtilissima Cleve is established by selecting a lectotype; a second one is described as a new species,N. parasubtilissima, and the third is identified asN. subtilissima var.micropunctata Germain. The last one warrants a specific status by its fine structural differences in having continuous striae consisting of a single elongate areola occluded by a hymen with perforations arranging hexagonally. The occurrence of these three species is shown in Japanese collections.

Key words

Bacillariophyceae Diatom Navicula micropunctata Navicula parasubtilissima Navicula subtilissima Taxonomy 

References

  1. Anonymous. 1975. Proposals for a standardization of diatom terminology and diagnoses. Nova Hedwigia Beih.53: 323–354.Google Scholar
  2. Archibald, R.E.M. 1983. The diatoms of the Sundays and Great Fish Rivers in the Eastern Cape Province of South Africa. Bibliotheca Diatomologica Bd.1. J. Cramer, Vaduz.Google Scholar
  3. Cleve, P.T. 1891. The diatoms of Finland. Act. Soc. Fauna Flora Fennica8(2): 1–68. 3 pls.Google Scholar
  4. Cleve-Euler, A. 1953. Die Diatomeen von Schweden und Finnland III. Kongl. Sv. Vet. Akad. Handl.4: 1–225. f. 484–970.Google Scholar
  5. Geissler, U., J. Gerloff, J.-G. Helmcke, W. Krieger andB. Reimann. 1963. Taf. 386–387.Navicula subtilissima Cleve.In J.-G. Helmcke and W. Krieger, ed., Diatomeenschalen im elektronenmikroskopischen Bild. Teil IV. J. Cramer, Weinheim.Google Scholar
  6. Gerloff, J. andJ.-G. Helmcke. 1977. Taf. 970–973.Navicula tuscula Ehrenberg.In J.-G. Helmckeet al., ed., Diatomeenschalen im elektronenmikroskopischen Bild. Teil X. J. Cramer, Vaduz.Google Scholar
  7. Germain, H. 1981. Flore des Diatomées, eaux douces et saumâtres. Boubee, Paris.Google Scholar
  8. — 1982. QuatreNaviucules du groupe desSubtilissimae (Diatomophyceae). Crypt. Algol.3: 105–111.Google Scholar
  9. Hustedt, F. 1952. Die Strukture der Diatomeen und die Bedeutung des Elektronenmikroskops für ihre Analyse II. Arch. f. Hydrobiol.47: 295–301.Google Scholar
  10. — 1955. Die grundsätzliche Struktur der Diatomeen-Membran und die taxonomische Auswertung elektoronenmikroskopischer Diatomeenaufnahmen. Bot. Not.108: 446–460.Google Scholar
  11. — 1961. Die Kieselalgen.In L. Rabenhorst, ed., Kryptogamen-Flora von Deutschland, Österreich und der Schweitz, vol. 7 (3–1). pp. 1–160. Akademische-Verlag, Leipzig.Google Scholar
  12. Kobayasi, H. 1985. Ultrastructural differences in certain taxonomically difficult species ofNitzschia sectionLanceolatae in Japan.In H. Hara, ed., Origin and Evolution of Diversity in Plants and Plant Communities, pp. 304–313. Academia Sci. Book, Tokyo.Google Scholar
  13. —, andT. Nagumo. 1985. Observations on the valve structure of marine species of the diatom genusCocconeis Ehr. Hydrobiologia127: 97–103.CrossRefGoogle Scholar
  14. Kolbe, R.W. 1951. Elektronenmikroskopische Untersuchungen von Diatomeenmenbranen II. Sv. bot. Tidskr.45: 636–647.Google Scholar
  15. — 1959. UberNavicula subtilissima Cl. Sv. bot. Tidskr.53: 155–159.Google Scholar
  16. Lange-Bertalot, H. andK. Bonik. 1978. Zur systematisch-taxonomischen Revision des ökologisch interessanten Formenkreises umNavicula mutica Kützing. Bot. Mar.21: 31–37.CrossRefGoogle Scholar
  17. Mann, D.G. 1981. Sieves and flaps: Siliceous minutiae in the pores of raphid diatoms.In R. Ross, ed., Proceedings of the Sixth Symposium on Recent and Fossil Diatoms, pp. 279–300. Otto Koeltz, Konigstein.Google Scholar
  18. Okuno, H. 1974. Freshwater diatoms. Taf. 866, 867.Navicula confervacea (Kütz.) Grunov.In J.-G. Helmckeet al., ed., Diatomeenschalen im elektronen mikroskopischen Bild. Teil IX. J. Cramer, Vaduz.Google Scholar
  19. Rosowski, J.R. 1980. Valve and band morphology of freshwater diatoms II. Integration of valve and bands inNavicula confervacea var.confervacea. J. Phycol.16: 88–101.CrossRefGoogle Scholar
  20. Ross, R. andP.A. Sims. 1978. Notes on some diatoms from the Isle of Mull, and other Scottish localities. Bacillaria1: 151–168.Google Scholar
  21. —,E.I. Cox, N.I. Karayeva, D.G. Mann, T.B.B. Paddock R. Simonsen andP.A. Sims. 1979. An amended terminology for the siliceous component of the diatom cell. Nova Hedwigia Beih.64: 513–533.Google Scholar
  22. Round, F.E. andD.G. Mann. 1981. The diatom genusBrachysira. 1. Typification and separation fromAnomoeoneis. Arch. Protistenk.124: 221–231.Google Scholar
  23. Voss, E.G., H.M. Burdet, W.G. Chaloner, V. Demoulin, P. Hiepko, J. McNeill, R.D. Meikle, D.H. Nicolson, R.C. Rollins, P.C. Silva, andW. Greuter (ed.) 1983. International Code of Botanical Nomenclature. Adopted by the Thirteenth International Congress, Sydney, August 1981. Bohn, Scheltema & Holkema, Utrecht/Antwerpen.Google Scholar
  24. Williams, D.W. 1986. Comparative morphology of some species ofSynedra Ehrenb. with a new definition of the genus. Diat. Res.1: 131–152.Google Scholar

Copyright information

© Botanical Society of Japan 1988

Authors and Affiliations

  • Hiromu Kobayasi
    • 1
  • Tamotsu Nagumo
    • 2
  1. 1.Department of BiologyTokyo Gakugei UniversityTokyo
  2. 2.Department of BiologyNippon Dental UniversityTokyo

Personalised recommendations