The species concept in diatoms: Evidence for morphologically distinct, sympatric gamodemes in four epipelic species

@article{Mann2004TheSC,
  title={The species concept in diatoms: Evidence for morphologically distinct, sympatric gamodemes in four epipelic species},
  author={David G. Mann},
  journal={Plant Systematics and Evolution},
  year={2004},
  volume={164},
  pages={215-237}
}
  • D. Mann
  • Published 1 March 1989
  • Biology
  • Plant Systematics and Evolution
Reproductive isolation is demonstrated between morphologically distinct, sympatric demes of four epipelic diatom species inhabiting a small pond. The six demes ofSellaphora pupula, four of them allogamous, one probably autogamous, and one apparently asexual, differ morphologically with respect to size, shape, stria density and pattern. In the pond,Caloneis silicula, Cymatopleura solea, andNeidium ampliatum each contain two allogamous demes, differing principally in size. There are intrinsic… 

3. Biodiversity, biogeography and conservation of diatoms

Recent morphometric and breeding studies of diatoms show that the present species classification is too coarse and hides significant diversity. Many species are subdivided into phenodemes, which

Ecological variation within Sellaphora species complexes (Bacillariophyceae): specialists or generalists?

To test whether semi- and pseudo-cryptic Sellaphora species are ecologically differentiated with respect to trophic status, tools recently developed in the UK in response to the EU Water Framework Directive (WFD) were used.

Molecular species discovery in the diatom Sellaphora and its congruence with mating trials

Investigation of the species limits of morphologically similar small-celled strains of the model diatom Sellaphora from the United Kingdom and Australia finds no simple metrics or presence/absence characters that could consistently separate all species of the auldreekie complex, even though some do differ in pole width or stria density.

Diatom identification in the face of changing species concepts and evidence of phenotypic plasticity

  • E. Cox
  • Environmental Science, Geography
  • 2014
Some of the problems of evaluating variation between clonal populations, the influence of findings from molecular biology and reproductive studies on the interpretation of morphology and species concepts, and some of the implications for ecological and palaeo-ecological studies using diatoms are considered.

New Species and Combinations in the Diatom Genus Sellaphora (Sellaphoraceae) from Southeastern United States

Three new species are described here and two new combinations are made in Sellaphora species from rivers and springs of the southeastern United States, which usually have low relative abundances in river samples.

Life history and systematics of Petroneis (Bacillariophyta), with special reference to British waters

Molecular phylogenetic analysis of selected raphid diatoms, based on rbcL sequences, indicates that Petroneis and Lyrella are sister genera and supports their separation into the family Lyrellaceae, order Lyrellales.

Genetic variation in the diatomFragilaria capucina (Fragilariaceae) along a latitudinal gradient across North America

Genetic variation in 126 clones of the planktonic diatom,Fragilaria capucina, collected from seven lakes from Manitoba to Texas, was determined by RAPD analysis, which showed that most clones grouped together according to the site from which they were collected.

Description of the Soil Diatom Sellaphora terrestris sp. nov. (Bacillariophyceae, Sellaphoraceae) from Vietnam, with Remarks on the Phylogeny and Taxonomy of Sellaphora and Systematic Position of Microcostatus

An evolutionary distance matrix showed the new species shared 94.1–97.2% similarities with other Sellaphora sequences, which is morphologically similar to species previously identified as representatives of the genus Microcostatus.

Revision of the diatom genus Sellaphora: a first account of the larger species in the British Isles.

The phenodemes of S. pupula sensu lato cannot be equated with the infraspecific taxa previously recorded for the British Isles and both these and most other pre-1990 records of species now assigned to Sellaphora must be regarded as having very little value for ecological and biogeographical purposes.
...

References

SHOWING 1-10 OF 43 REFERENCES

The diatom genus Sellaphora: Separation from Navicula

The genus Sellaphora Mereschkowsky is resurrected to include those naviculoid diatoms with an H-shaped plastid containing an invaginated pyrenoid and gametangia that produce one gamete apiece and remain closely associated throughout meiosis and plasmogamy, without any obvious mucilage envelope around them.

On auxospore formation inCaloneis and the nature ofAmphiraphia (Bacillariophyta)

  • D. Mann
  • Biology
    Plant Systematics and Evolution
  • 2004
AmphiraphiaChen & Zhu, together with theAmphiraphiaceae andAmphiraphidales, should be abandoned, sinceAmphiraphia cells are the heterovalvar initial cells ofCaloneis. WhenCaloneis reproduces sexually

A Check-List of the Freshwater, Brackish and Marine Diatoms of the British Isles and Adjoining Coastal Waters

This is the first comprehensive check-list of the diatoms of the British Isles to cover all currently reported taxa from freshwater, brackish and marine habitats. It contains a classification of the

Auxospore formation and development in Neidium (Bacillariophyta)

The method of auxospore formation suggests that Neidium is closely related to Amphipleura and Frustulia.

SEXUAL REPRODUCTION IN CYMATOPLEURA

Auxospore formation has been studied in three Edinburgh populations of Cymatopleura solea and is in all cases associated with sexual reproduction. Vegetative cells are subtly heteropolar, one pole

Beiträge zur Entwicklungsgeschichte und Taxonomie einigerAchnanthes-Arten, SubgenusMicroneis (Bacillariophyceae)

There is an obvious correlation between the occurrence of a localized holdfast and the formation of colonies in Achnanthes hungarica, except the mode of fastening to the substrate.

Untersuchungen über Kopulation und Auxosporenbildung pennater Diatomeen. IV., V.

  • L. Gèitler
  • Philosophy
    Österreichische botanische Zeitschrift
  • 2005
Navicula cryptocephala var.veneta fa. bildet, im Gegensatz zu allen anderen untersuchtenN.-Arten mit Ausnahme vonN. seminulum, aus zwei Mutterzellen eine Zygote. Die Zygoten enthalten zunächst zwei

Automixis bei pennaten Diatomeen

  • L. Gèitler
  • Chemistry
    Plant Systematics and Evolution
  • 2004
Automixis in the form of paedogamy or more rarely of autogamy is widely distributed among pennate diatoms.

Entwicklungsgeschichtliche Eigentümlichkeiten einigerAchnanthes-Arten (Diatomeae)

InAchnanthes lanceolata pairing occurs by chance in regard to the arrangement of the mother cells, inA. minutissima it is accomplished selectively: contact at the sides occupied by the nucleus is

Zur Lebensgeschichte und Morphologie pennater Diatomeen. I. Allogamie beiGomphonema constrictum var.capitatum (Ehr.)Cleve

Eine Population aus einem Freilandbecken im Botanischen Garten der Universiti~t Wien, wo die Varieti~t im Juni 1971 auftrat, wurde von einer VerSffentlichung abgesehen, weil im wesentlichen Ubereinst immung mit den friiheren Befundea bestand.