Skip to main content
padlock icon - secure page this page is secure

Free Content Type analysis of Achnanthidium minutissimum and A. catenatum and description of A. tropicocatenatum sp. nov. (Bacillariophyta), a common species in Brazilian reservoirs

Download Article:
(PDF 8,200.5 kb)
Background and aims – A commonly occurring Achnanthidium species has been observed in Brazilian reservoirs. The morphological features were described based on light and scanning electron microscope observations and it is described here as A. tropicocatenatum sp. nov.

Methods – The new species was compared with the type material of morphologically similar taxa: Achnanthidium catenatum and A. minutissimum. Comparisons with the most related species based on literature were also provided. Traditional weighted-averaging approaches (WA) were applied to model ecological optima.

Key results – Morphometric analysis of the valve shape supported the taxa separation; they can be easily differentiated by the morphological and ultrastructural features, including subcapitate to capitate apices, strongly radiate striae and a prominent axial area. This new species has been found in alkaline waters with low electrolyte content.

Conclusions – Records of A. catenatum in Brazil are considered questionable because the species may have been confused with A. tropicocatenatum sp. nov.
No References for this article.
No Supplementary Data.
No Article Media
No Metrics


Document Type: Regular Paper

Publication date: November 1, 2017

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more