Critical criteria for identification of the genus <i>Chaetoceros</i> (Bacillariophyta) based on setae ultrastructure. I. Subgenus <i>Chaetoceros</i>

Lee, Sang Deuk; Park, Joon‐Sang; Yun, Suk Min; Lee, Jin Hwan

doi:10.2216/13-154.1

Cited by 28 publications

(20 citation statements)

References 17 publications

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“…The size, shape and density of the seta poroids we found to be our first choice of character when identifying species in this group, supporting the recent suggestion by [37, 38] to extend the use of morphological characters to include characters of the setae. Poroid size differed among all the species although with some overlap (Fig 17).…”

Section: Discussionsupporting

confidence: 85%

Diversity in the Globally Distributed Diatom Genus Chaetoceros (Bacillariophyceae): Three New Species from Warm-Temperate Waters

et al. 2017

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Chaetoceros is one of the most species rich, widespread and abundant diatom genera in marine and brackish habitats worldwide. It therefore forms an excellent model for in-depth biodiversity studies, assessing morphological and genetic differentiation among groups of strains. The global Chaetoceros lorenzianus complex presently comprises three species known to science. However, our recent studies have shown that the group includes several previously unknown species. In this article, 50 strains, mainly from high latitudes and from warm-temperate waters, were examined morphologically and genetically and the results compared with those of field studies from elsewhere. The strains clustered into five groups, two of which are formed by C. decipiens Cleve and C. mitra (Bailey) Cleve, respectively. Their species descriptions are emended based on samples collected close to the type localities. The three other groups are formed by new species, C. elegans sp. nov., C. laevisporus sp. nov. and C. mannaii sp. nov. Characters used to distinguish each species are: orientation of setae, shape and size of the apertures, shape, size and density of the poroids on the setae and, at least in some species, characters of the resting spores. Our aim is to cover the global species diversity in this complex, as correct species delineation is the basis for exploring biodiversity, distribution of organisms, interactions in the food web and effects of environmental changes.

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Section: Discussionsupporting

confidence: 85%

Diversity in the Globally Distributed Diatom Genus Chaetoceros (Bacillariophyceae): Three New Species from Warm-Temperate Waters

et al. 2017

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“…Chaetoceros have been known to the representatively planktonic diatom and the most species-rich genera in the marine or brackish water (Hernández-Becerril 1995, Hasle and Syvertsen 1996, Lee et al 2014a, 2014b. In Korea, 56 Chaetoceros species have been described and published from the Yellow Sea, the East Sea and the South Sea (Lee and Lee 2011, Lee et al 2014a, 2014b, and 40 Thalassiosira taxa were reported Lee 2010, Lee et al 2012).…”

Section: Resultsmentioning

confidence: 99%

Floristic Survey of Diatom in the Three Islands (Baeknyeong, Daecheong, Socheong) from Yellow Sea of Korea

Lee¹,

Yun²,

Park³

et al. 2015

J. Ecol. Environ.

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A floristic study on the diatom was carried out in coastal area at two seasons, August 2014 and April 2015, from three islands in the northern area of Yellow Sea of South Korea. A total of 117 species of diatoms, including 3 classes, 9 subclasses, 20 orders, 32 families and 54 genera, were identified based on LM and SEM examinations. Three species of diatoms, Gyrosigma obscurum, Pleurosigma frenguellianum, and P. sabangi were newly recorded in Korea. The historical synonyms of the species are presented for the floristic informations, the examined specimen for the each taxon is specified, and the distribution in three islands and detailed sampling localities of each taxon are given.

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“…This idea was recently developed further by LEE et al (2014) who proposed the use of several setae characters as the identifi cation criteria in the subgenus Chaetoceros, which includes species with thick and chloroplasts containing setae. Chaetoceros wighamii belongs to the subgenus Hyalochaete which comprises species possessing relatively thin setae without chloroplasts.…”

Section: Discussionmentioning

confidence: 99%

Morphological study of Chaetoceros wighamii Brightwell (Chaetocerotaceae, Bacillariophyta) from Lake Vrana, Croatia

Bosak

Udovič

Sarno

2015

Acta Botanica Croatica

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-Chaetoceros wighamiiBrightwell is a planktonic diatom species originally described from brackish waters. Since its original description, the species has been reported in a wide variety of habitats, ranging from freshwater to marine. Varying descriptions exist in the taxonomic literature and several taxa have been considered as synonyms, including freshwater species Chaetoceros amanita. In this study we provide morphological and ultrastructural information on a cultured strain isolated from freshwater sample collected in the Lake Vrana (Vransko jezero) in Croatia, in April 2011. The cells form short and robust chains with very narrow apertures, often partially occluded by silica membranes. Other distinctive features observable in light microscopy are the shape and orientation of the setae which are very long, straight and robust, diverging in various directions from the chain axis and the single parietal chloroplast extending from valve to valve. Distinct ultrastructural characteristics are the absence of processes either in intercalary or terminal valves and the ornamentation of the valve face with densely distributed ribs spreading from an irregular eccentric hyaline area without a clearly defi ned annulus. The outer surface of the terminal valve is ornamented with small spines and setae are composed of fl at longitudinal fi laments interconnected with short bars and ornamented with small spines tightly arranged around the setae. Our description agrees well with that reported for the freshwater morphotypes of C. wighamii (syn. C. amanita) and contributes for a reliable distinction of this intriguing taxon from similar morphotypes. This fi nding supports the interpretation of Chaetoceros wighamii as a freshwater/brackish species and represents the fi rst report of a Chaetoceros species in lacustrine environment in Croatia and possibly in any Central European habitats.

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Critical criteria for identification of the genus Chaetoceros (Bacillariophyta) based on setae ultrastructure. I. Subgenus Chaetoceros

Cited by 28 publications

References 17 publications

Diversity in the Globally Distributed Diatom Genus Chaetoceros (Bacillariophyceae): Three New Species from Warm-Temperate Waters

Diversity in the Globally Distributed Diatom Genus Chaetoceros (Bacillariophyceae): Three New Species from Warm-Temperate Waters

Floristic Survey of Diatom in the Three Islands (Baeknyeong, Daecheong, Socheong) from Yellow Sea of Korea

Morphological study of Chaetoceros wighamii Brightwell (Chaetocerotaceae, Bacillariophyta) from Lake Vrana, Croatia

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