Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-23T16:06:14.840Z Has data issue: false hasContentIssue false
  • English
  • Français

New and little-known marine and freshwater species of the silica-scaled genera Thaumatomastix and Reckertia (Cercozoa: Thaumatomonadida)

Published online by Cambridge University Press:  24 September 2012

Kenneth H. Nicholls
Kenneth H. Nicholls*
Affiliation:
S-15 Concession 1, RR #1 Sunderland, Ontario, CanadaL0C 1H0
*
Correspondence should be addressed to: K.H. Nicholls, S-15 Concession 1, RR #1 Sunderland, Ontario, CanadaL0C 1H0 email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Six new marine species of the silica-scaled heterotrophic genus Thaumatomastix are formally described: two were found in Canadian Atlantic Ocean coastal waters (T. asymmetrica sp. nov. and T. sablensis sp. nov.) and four from Canadian Pacific Ocean coastal waters (T. inornata sp. nov., T. multipora sp. nov., T. gwaii sp. nov. and T. curvata sp. nov.). These discoveries more than double the number of known marine species of this genus from four to ten. The scale structures of all differ significantly from those of previously known species and therefore warrant erection as new species. Amended descriptions of two previously little-known freshwater species (T. triangulata and T. nigeriensis) are provided based on specimens found in freshwater ponds and lakes in Ontario, Lanada, and provide evidence refuting the recent published proposals to transfer T. triangulata back to the photo-autotrophic genus Chrysosphaerella and to transfer T. nigeriensis to the related thaumatomonad genus Reckertia. Until now, all known species of Reckertia (including several taxa previously classified in Thaumatomastix) were marine. This paper describes the first known freshwater species of Reckertia (R. hindoni sp. nov.) found in two separate Ontario ponds. The similarities and differences among many of the marine and freshwater species of Thaumatomastix suggest a common ancestor but significant evolutionary divergence over time and space.

Keywords

ThaumatomastixReckertiaCercozoaThaumatomonadidasand-dwellingheterotrophicsilica-scaled flagellates
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 5 , August 2013 , pp. 1231 - 1244
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Balonov, I.M. (1980) On the new species of the genus Chrysosphaerella (Chrysophyta). Botanicheskii Zhurnal 65, 1190–1191. [In Russian.]Google Scholar
Beech, P.L. and Moestrup, Ø. (1986) Light and electron microscopical observations on the heterotrophic protist Thaumatomastix salina comb. nov. (syn. Chrysosphaerella salina) and its allies. Nordic Journal of Botany 6, 865–877.CrossRefGoogle Scholar
Birch-Andersen, P. (1973) Chrysosphaerella salina; a new species of the Chrysophyceae for salt marsh pools. Botanisk Tidsskrift 68, 140–144.Google Scholar
Cavalier-Smith, T. and Chao, E. (2003) Phylogeny and classification of phylum Cercozoa (Protozoa). Protist 154, 341–358.CrossRefGoogle ScholarPubMed
Dürrschmidt, M. (1989) Contribution to the knowledge of tropical chrysophytes: Mallomonadaceae and Paraphysomonadaceae from Sri Lanka. Archiv für Hydrobiologie, Supplement 82, Algological Studies 45, 15–37.Google Scholar
Howe, A., Bass, D., Scoble, J., Lewis, R., Vickerman, K., Arndt, H. and Cavalier-Smith, T. (2011) Novel cultured protists identify deep-branching environmental DNA clades of Cercozoa: new genera Tremula, Micrometopion, Minimassisteria, Nudifila, Peregrinia. Protist 162, 332–372.CrossRefGoogle ScholarPubMed
Jocobsen, B.A. (1985) Scale-bearing Chrysophyceae (Mallomonadaceae and Paraphysomonadaceae) from West Greenland. Nordic Journal of Botany 5, 381–398.CrossRefGoogle Scholar
Mikrjukov, K.A. (2002) Thaumatomastix tauryanini sp. n. (Protista, Sarcomonadea, Thaumatomonadida) is a new species of phagotrophic amoebo-flagellate from the White Sea sediments. Zoologičeskij Žurnal 81, 262–265. [In Russian.]Google Scholar
Nicholls, K.H. (1980) A reassessment of the taxonomy of Chrysosphaerella longispina Laut. and C. multispina Bradley and a revised key to related genera in the Synuraceae (Chrysophyceae). Plant Systematics and Evolution 135, 95–106.CrossRefGoogle Scholar
Nicholls, K.H. (2009a) Six new marine species of the genus Paulinella (Rhizopoda: Filosea, or Rhizaria: Cercozoa). Journal of the Marine Biological Association of the United Kingdom 89, 1415–1425.CrossRefGoogle Scholar
Nicholls, K.H. (2009b) A multivariate statistical evaluation of the ‘acolla-complex' of Corythionella species, including a description of C. darwini n. sp. (Rhizopoda: Filosea, or Rhizaria: Cercozoa). European Journal of Protistology 45, 183–192.CrossRefGoogle Scholar
Štefanová, I. and Kalina, T. (1992) New and rare species of silica-scaled chrysophytes from eastern Bohemia (Czechoslovakia). Archiv für Protistenkunde 142, 167–178.CrossRefGoogle Scholar
Takahashi, E. and Hara, S. (1984) Two new marine species of Chrysosphaerella (Chrysophyceae) with a reinvestigation of C. salina. Phycologia 23, 103–109.CrossRefGoogle Scholar
Thomsen, H.A., Hällfors, G., Hällfors, S. and Ikävalko, J. (1993) New observations on the heterotrophic protist genus Thaumatomastix (Thaumatomastigaceae, Protista incertae sedis), with particular emphasis on material from the Baltic Sea. Annales Botanici Fennici 30, 87–108.Google Scholar
Thomsen, H.A., Kosman, C. and Ikävalko, J. (1995) Three new species of Thaumatomastix (Thaumatomastigidae, Protista incertae sedis), a ubiquitous genus from the Antarctic ice biota. European Journal of Protistology 31, 174–181.CrossRefGoogle Scholar
Thomsen, H.A. and Ikävalko, J. (1997) Species of Thaumatomastix (Thaumatomastigidae, Protista incertae sedis) from the Arctic sea ice biota (North-East Water Polynya, NE Greenland). Journal of Marine Systems 10, 263–277.CrossRefGoogle Scholar
Vørs, N. (1992) Heterotrophic amoebae, flagellates and heliozoa from the Tvärmine area, Gulf of Finland, In 1988–1990. Ophelia 36, 1–109.CrossRefGoogle Scholar
Wujek, D.E. (1968) Presence of a second flagellum in Chrysosphaerella multispina. Journal of Phycology 4, 167–168.CrossRefGoogle ScholarPubMed
Wujek, D.E. (1985/1986) Ultrastructure of flagellated chrysophytes. IV. Chrysophaerella. Journal of the Minnesota Academy of Science 51, 33–36.Google Scholar
Wujek, D.E. (2010) The first occurrence of the protist Thaumatomastix from North America. Journal of the North Carolina Academy of Science 126, 158–159.Google Scholar
Wujek, D.E. and O'Kelly, C.J. (1992) Scales of the ‘marine' flagellate protist Thaumatomastix bipartita observed in a New Zealand freshwater lake. Archiv für Protistenkunde 141, 184–186.CrossRefGoogle Scholar
Wujek, D.E., Pershon, L.E. and Kadiri, M.O. (2008) Description of a new freshwater species of Thaumatomastix (Protista, Thaumatomonadida) from Nigeria, West Africa. Tropical Freshwater Biology 17, 13–20.Google Scholar