Table of Contents
ISRN Biodiversity
Volume 2013 (2013), Article ID 653958, 7 pages
http://dx.doi.org/10.1155/2013/653958
Research Article

Numerical Taxonomy of Species in the Genus Mallomonas (Chrysophyta) from China

College of Life Science, Shanxi University, Taiyuan 030006, China

Received 4 June 2013; Accepted 26 June 2013

Academic Editors: I. Bisht and P. De los Ríos Escalante

Copyright © 2013 Jia Feng and Shulian Xie. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Mallomonas is one of the biggest genera of Chrysophyta. In total, 37 species and 2 varieties have been recorded in China. Because of their narrow ecological optimum, species of this genus are considered as valuable bioindicators. However, taxonomy of Mallomonas remains unclear. We studied the numerical taxonomy of all the species and varieties recorded in China using Ward’s method and the furthest neighbor method based on 52 morphological characters. Shown in the phylogenetic trees, those species could be divided into two major clusters. One cluster includes 5 small clusters and another includes 2. The results of numerical taxonomy are partially consistent with the traditional ones with some divergences. Furthermore, the diversity of silicified scales including shapes and structures was confirmed as the most important character for identification of Mallomonas species.