Aulacoseira calypsi sp. nov. (Coscinodiscophyceae) from an Amazonian lake, northern Brazil. Issue 4 (20th September 2013)

• Record Type: Journal Article
• Authors: Tremarin, Priscila Izabel; Paiva, Rosildo Santos; Ludwig, Thelma Veiga; Torgan, Lezilda Carvalho
• Is Part Of: Phycological research. Volume 61:Issue 4(2013:Oct.)
• Page Start: 292
• Page End: 298
• Publication Date: 2013-09-20
• Subjects: Algae -- Japan -- Periodicals; Algae -- Periodicals; 579.8
• DOI: 10.1111/pre.12031
• Languages: English
• ISSNs: 1322-0829

Abstract

<abstract abstract-type="main"> <title>Summary</title> <p>This paper describes a new diatom species, <italic>Aulacoseira calypsi</italic> Tremarin, Torgan &amp; Ludwig, from specimens in plankton samples from Água Preta lake. This Amazonian lake is a shallow mesotrophic environment situated in northern Brazil. The species is characterized by long filaments united by spatulate linking spines, obovate to conic separation spines, a valve surface variably ornamented, straight striae on the mantle, a narrow ringleist, and one row of sessile rimoportulae near the ringleist. <italic>Aulacoseira calypsi</italic>'s morphometric features are compared with the following similar species: <italic>Aulacoseira nygaardii</italic> (Camburn) Camburn &amp; Charles, <italic>Aulacoseira lacustris</italic> (Grunow) Krammer, <italic>Aulacoseira coroniformis</italic> Pearce &amp; Cremer, <italic>Aulacoseira occulta</italic> Siver &amp; Hamilton, <italic>Aulacoseira lancea</italic> Siver &amp; Hamilton<italic>, Aulacoseira gessneri</italic> (Hustedt) Simonsen, and <italic>Aulacoseira islandica</italic> (Müller) Simonsen. The species shares similarities as to frustule size, striation pattern, and narrowness of ringleist; but differs in the morphology of separation and linking spines, and the number and position of the rimoportulae.</p> </abstract>