Accessible Requires Authentication Published by De Gruyter January 8, 2014

Two new Mastogloia species (Bacillariophyceae), M. parlibellioides and M. lyra, from coral reefs in Guam, Western Pacific1

Christopher S. Lobban and Chiara Pennesi
From the journal Botanica Marina

Abstract

This paper describes the morphology of two new species of Mastogloia identified during a survey of the marine benthic diatom flora of Guam. Mastogloia parlibellioides sp. nov., classified in the section Decussatae, is distinctive in the combination of its valve shape and stria pattern reminiscent of Parlibellus, as well as the presence of rudimentary division walls extending from the free margin to the middle of each partectum. Mastogloia lyra sp. nov., classified in the section Sulcatae, subgroup 2, has internal lyre-shaped lateral sterna and partecta that are displaced toward the midline of the valve by a siliceous flange, which shows oblique partectal ducts. The descriptions of these two new species increase the knowledge base of biodiversity in a Pacific Ocean Mastogloia hotspot.


Corresponding author: Chiara Pennesi, Department of Life and Environmental Sciences, Polytechnic University of the Marche, Via Brecce Bianche, 60131 Ancona, Italy, e-mail:

  1. 1

    Note by the publisher: For the current version of the article, all of the figures were enlarged. This is a necessary editorial change regrettably omitted in the online first version published on January 8, 2014. We sincerely apologize for any inconveniences that may have been caused.

CSL acknowledges NIGMS RISE funding for LM and SEM instruments on Guam; thanks are also given to María Schefter for her continuous encouragement and support. A special thanks goes to Dr. Michel Poulin for his important advice in this study. Sample Gab2K was collected and prepared by Yumi Arai as part of her Master’s thesis work at Yamagata University, Japan. Special thanks are given to Professor Michael Sullivan and the anonymous reviewers who contributed to improving this work.

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Received: 2013-3-4
Accepted: 2013-11-28
Published Online: 2014-01-08
Published in Print: 2014-02-01

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