Tamotsu Nagumo:

Taxonomic studies of the subgenus Amphora Cleve of the genus Amphora (Bacillariophyceae) in Japan

2003. 265 pages, 106 plates, 14x22cm, 530 g
Language: English

(Bibliotheca Diatomologica, Band 49)

ISBN 978-3-443-57040-8, paperback, price: 86.00 €

in stock and ready to ship

Order form

BibTeX file


Bacillariophyceae taxonomy Naviculaceae Kieselalge Klassifikation Flora Wasser Japan


Abstract top ↑

The genus Amphora is one of the larger genera belonging to the family Naviculaceae and includes about 350 taxa. It is a widespread genus with a few species occurring in freshwater and brackish water, and many species in marine habitats. Members of the genus are clearly distinguished from related genera. The characteristic, strongly dorsiventral frustule has raphe systems which lie close to the ventral margins of the valve. There is no taxonomic revision and clear definition of the genus Amphora based modern taxonomic criteria covering both freshwater to marine species.

This study deal with the taxonomy the subgenus Amphora, for freshwater and marine species in Japan. In addition to the characters observable by light microscopy, characters revealed mainly by scanning and transmission electron microscopy, such as raphe system and the shape of dorsal marginal costa, were employed to establish the taxonomy of the taxa considerd herein. Eighteen taxa are recognized in this work. First, each taxon was observed in detail using SEM to expand current knowledge of its fine structure. Taxonomic identification was then confirmed with reference to type material or other historic collections. Among the taxa investigated here, four are new to science, one is a new combination and one is a new name. Ten of the taxa investigated here (Amphora barrowiana (Patr. et Freese) Nagumo comb. nov., A. copulata (Kützing) Schoeman et Archibald, A. hiromuii Nagumo sp. nov., A. inariensis Krammer, A. liriope Nagumo sp. nov., A. macedoniensis Nagumo sp. nov., A. ovalis Kützing., A. pediculus (Kützing) Grun., A. rotunda Skv., A. sibirica Skv. et Meyer) are from freshwaters habitats. Three (A. arenicola (Grun.) Cleve, A. javanica Schmidt, A. libyca Ehr.) are from brackish-water habitats and five (A. gigantea Grun., A. immarginata Nagumo sp. nov., A. marina W. Smith, A. plativalvata Nagumo nom. et stat. nov., A. schmidtii Grun.) are from marine habitats.

Contents top ↑

Abstract 4
I. Introduction 5
II. Materials and methods 6
1. Collection 6
2. Culture 6
3. Sample preparation 7
4. Microscopy 7
4. 1. Light microscopy (LM) 7
4. 2. Scanning electron microscopy (SEM) 7
4. 3. Other microscopical techniques 8
III. Taxonomic history 8
IV. Morphology and terminology 9
1. General morphology of the genus Amphora 9
2. General morphology of the subgenus Amphora 11
V. Sexual reproduction 12
1. Sexual reproduction of A. liriope 13
2. Auxospore and initial valve structure of A. copulata 13
VI. Descriptions and notes of the taxa 14
1. Amphora arenicola (Grunow) Cleve 14
2. A. barrowiana (Patrick et Freese) Nagumo comb. nov. 15
3. A. copulata (Kützing) Schoeman et Archibald 17
4. A. gigantea Grunow 19
5. A. hiromuii Nagumo sp. nov. 20
6. A. immarginata Nagumo sp. nov. 22
7. A. inariensis Krammer 23
8. A. javanica Schmidt 25
9. A. libyca Ehrenberg 26
10. A. liriope Nagumo sp. nov. 28
11. A. macedoniensis Nagumo sp. nov. 30
12. A. marina W. Smith 32
13. A. ovalis Kützing 33
14. A. pediculus (Kützing) Grunow 35
15. A. plativalvata Nagumo nom. et stat. nov. 37
16. A. rotunda Skvortzow 38
17. A. schmidtii Grunow 40
18. A. sibirica Skvortzow et Meyer 41
VII. General discussion 43
VIII. Artificial key to the taxa of subgenus Amphora 45
Acknowledgements 47
Literature cited 48
Plates 1-106