Author(s): Morales, Eduardo ; Novais, Maria Helena ; García, María Luján ; Maidana, Nora ; Morais, Manuela
Date: 2024
Persistent ID: http://hdl.handle.net/10174/36945
Origin: Repositório Científico da Universidade de Évora
Subject(s): biodiversity; morphology; Staurosiraceae; taxonomy; ultrastructure
Two new Nanofrustulum species, N. lucectorii sp. nov. and N. ibericum sp. nov. are described from temporary streams in southern Portugal based on light and electron microscopy observations. Nanofrustulum lucectorii sp. nov. is characterised by elliptic valves with broadly rounded apices, spines with a solid core, an apically elliptic base, a flattened body, and spatulate, serrate tips that are wider than the spine body. These spines have rectangular stipules covering the first subtending mantle areola. The equal apical pore fields are present at both valve apices and are composed of a single transapical row of sunken pores. Nanofrustulum ibericum sp. nov., in turn, is unique in that it has solid spines with a triangular or trapezoid base, and a triangular and recurved body. Additionally, the blisters on the abvalvar side of the mantle are pervalvary rectangular and widely spaced. The morphological features, ecology and distribution of the new species are discussed based on relevant literature.
This work was co-funded by the Science and Management of Intermittent Rivers & Ephemeral Streams (SMIRES) COST Action (CA 15113), http://www.smires.eu, the European Union through the European Regional Development Fund, framed within the Operational Programme Competitiveness and Internationalization, COMPETE 2020 through the ICT project (UID /GEO /04683/2013) with reference POCI-01-0145-FEDER-007690, and the Agência Portuguesa do Ambiente, APA-000004DFIN. AA LP/2017 integrated within the Operational Program for Sustainability and Efficiency in the Use of Resources 2014-20, POSEUR-03-2013-FC-000001.
