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      Comentarios y observaciones acerca de la diatomea Craspedostauros indubitabilis (Lange-Bertalot & Genkal) E.J. Cox encontrada por primera vez en aguas marinas costeras de Chile Translated title: Comments and observations on the diatom Craspedostauros indubitabilis (Lange-Bertalot & Genkal) E.J. Cox found for the first time in marine coastal waters of Chile

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          Abstract

          Especímenes de Craspedostauros indubitabilis (Lange-Bertalot & Genkal) E.J. Cox provenientes de una muestra recolectada en Bahía Salada, Caldera, Chile (27°38'S-71°00'W) fueron oxidados y examinados mediante técnicas de microscopía fotónica y electrónica. El género y la especie son señalados por primera vez para las aguas marinas costeras de Chile. Craspedostauros fue descrito por Cox en 1999 para reunir algunas diatomeas marinas birrafidales, ubicadas hasta esa fecha en los géneros Stauroneis Ehrenberg y Stauronella Mereschkowsky. El género puede ser reconocido por sus aréolas provistas de cribra, un estauro angosto, numerosas bandas en el cingulum y dos cloroplastos en forma de H con una peculiar disposición en la zona central. De acuerdo con el material chileno, Craspedostauros indubitabilis se caracteriza por poseer valvas linear-elípticas a lanceoladas con extremos generalmente redondeados, las estrías (22-30 en 10 μπι) son paralelas en el centro de la valva y levemente convergentes cerca de los extremos, las aréolas adyacentes al rafe son de mayor tamaño que las restantes, cada aréola está ocluida por 3 a 13 poros, y un engrosamiento de sílice separa los extremos proximales internos del rafe. Se provee una diagnosis de este taxón basado en las características observadas en el material chileno. Las fotomicrografías que se presentan entregan información acerca de sus principales características morfológicas.

          Translated abstract

          Specimens of Craspedostauros indubitabilis (Lange-Bertalot & Genkal) E.J. Cox from a sample taken in Bahía Salada, Caldera, Chile (27°38'S-71°00'W) were acid cleaned and examined by light and electron microscopy. The genus and the species are reported for the first time from Chilean marine coastal waters. Craspedostauros was described in 1999 by Cox for some marine biraphid diatoms previously placed in Stauroneis Ehrenberg and Stauronella Mereschkowsky. The genus is recognized by its cribrate areolae, narrow stauros, numerous girdle bands and two chloroplasts fore and aft of the central cytoplasm. According to the Chilean material, Craspedostauros indubitabilis is characterized by its linear-elliptic to lanceolate valves usually with rounded ends, the striae (22-30 in 10 μΓη) are parallel in the valve centre and slightly convergent near the apices, the areolae adjacent to the raphe are much larger than over the rest of the valve, each areolae is occluded by 3 to 13 pores, and a knob of silica separates the central internal raphe endings. A diagnosis is here included for this taxon based on the characteristics observed in the Chilean material. The presented photomicrographs aim to provide information about the main morphological features.

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          Benthic diatom flora of freshwater and saline lakes in the Larsemann Hills and Rauer Islands, East Antarctica

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            The flora of the South Sandwich Islands, with particular reference to the influence of geothermal heating

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              Studies on food value of nineteen genera of algae to juvenile bivalves of the green Ostrea, Crassostrea, Mercenaria and Mytilus

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                gbot
                Gayana. Botánica
                Gayana Bot.
                Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción (Concepción )
                0717-6643
                2011
                : 68
                : 2
                : 123-128
                Affiliations
                [1 ] Universidad de Concepción Chile
                [2 ] Public Research Centre-Gabriel Lippmann Luxembourg
                Article
                S0717-66432011000200001
                10.4067/S0717-66432011000200001
                afcc5aa3-d0f6-4f69-9e0d-2c4044b70d5b

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Chile

                Self URI (journal page): http://www.scielo.cl/scielo.php?script=sci_serial&pid=0717-6643&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                Craspedostauros indubitabilis,Bacillariophyceae,morphology,taxonomy,distribution,Chile,morfología,taxonomía,distribución

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