ELEKTRONENMIKROSKOPISCHE UNTERSUCHUNGEN AN DEM TYPUSMATERIAL DER ZENTRISCHEN KIESELALGE<i>CYCLOTELLA STELLIGERA</i>CLEVE ET GRUNOW

Chang, Tsang-Pi

doi:10.1080/0269249x.1991.9705143

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Discostella sp. 1 is also similar in LM to one of Grunow's drawings of the type material (Houk & Klee, 2004, fig 22a) and to the specimens studied by Chang (1991) in the type material of D. stelligera, named Group A by him (Chang, 1991, figs 2a, 2a 0 and 2b). However, the ultrastructure of Discostella sp.…”

Section: Observationssupporting

confidence: 76%

“…When observed with LM our specimens of D. stelligera var. stelligera closely resemble those of the type material illustrated by Chang (1991) as Groups B and C. However, in contrast to the type specimens, valves collected from the Rı´o Limay basin exhibit an overall smooth external appearance, without external granules or silica warts. On the concave valves, the central area is smooth and striae are lacking or, at most, very faintly defined.…”

Section: Observationssupporting

confidence: 50%

“…We acknowledge that specimens of Discostella taxa are generally quite scarce in our samples, which consequently makes the study of the morphological variability of each species in natural populations difficult. Low abundances of D. stelligera in nature and consequent lack of information on developmental stages have also been reported by Chang (1991). We therefore think that culture studies would help to clarify the taxonomy of the group as a whole, e.g.…”

Section: Discussionmentioning

confidence: 76%

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Discostellataxa (Bacillariophyta) from the Río Limay basin (northwestern Patagonia, Argentina)

Guerrero

Echenique

2006

European Journal of Phycology

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Discostella stelligera and allied similar taxa are mainly identified by the presence of marginal fultoportulae located at the end of the striae, and not on the interstriae, as occurs in the genus Cyclotella, from which they have recently been removed. In this paper, valve morphology and ultrastructure of D. stelligera, D. glomerata, D. pseudostelligera and D. woltereckii collected from different environments within the Rı´o Limay basin are described and illustrated. Morphological characters that allow the delimitation of taxa within the group are discussed and the ultrastructure of D. stelligera var. elliptica comb. nov. is shown for the first time. Two organisms that possess distinct morphological characters, and might be considered new species, are described.

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Section: Observationssupporting

confidence: 76%

Section: Observationssupporting

confidence: 50%

Section: Discussionmentioning

confidence: 76%

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Discostellataxa (Bacillariophyta) from the Río Limay basin (northwestern Patagonia, Argentina)

Guerrero

Echenique

2006

European Journal of Phycology

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“…Håkansson in Krammer & Lange-Bertalot (1991) named this group as Cyclotella stelligera, C. pseudostelligera and C. glomerata as proved species. After the research results of the reference material of Cyclotella stelligera (Chang 1991) and our own results of a population of Cyclotella pseudostelligera collected from Kenya (Kotut et al 1998) there are clear differences between the sizes of the taxa. The diameter of the initial cells beginning from the basic vegetative development stage reaches up to 40 µm in Cyclotella stelligera and only up to 15 µm in Cyclotella pseudostelligera (Kotut et al 1998).…”

Section: Discussionmentioning

confidence: 96%

Topical observations on centric diatoms (Bacillariophyceae, Centrales) of Lake Como (N. Italy)

Scheffler¹,

Morabito²

2003

J Limnol

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In 2001 a qualitative analysis of the centric diatoms in Lake Como was made. In this work 15 taxa of the genus of Stephanodiscus, Cyclotella, Melosira, Aulacoseira and Stephanocostis were recorded. Among them the taxa Cyclotella pseudostelligera, C. comensis, C. comensis morphotype minima, C. costei, Stephanodiscus minutulus and Stephanocostis chantaicus were of special interest to us with regard to their morphological and taxonomical features. Morphological variability as well as taxonomical classification is discussed. A short appraisal of the ecological state of the Lake Como is given. Without any further critical considerations all centric taxa of Lake Como recorded from fossil to up-to-date collections are compiled

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“…stelligera (Cleve & Grun .) Van Heurck and allied forms (Haworth & Hurley, 1986 ;Chang, 1991 ;Hdkansson in Krammer & Lange-Bertalot, 1991) . Although there are other elliptical forms, light and scanning electron microscope studies show that this is a separate species herein described under the name Cyclotella tasmanica .…”

Section: Introductionmentioning

confidence: 99%

Morphology and taxonomy of Cyclotella tasmanica spec. nov, a newly described diatom from Tasmanian lakes

Haworth

Tyler

1993

Hydrobiologia

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A species of Cyclotella with an elliptical valve outline has been found in several Tasmanian lakes and is herein described and named C . tasmanica nov . sp . Morphologically, it is similar to C . stelligera and, to a lesser extent, to C. radiosa . The valve has coarse, clearly alveolate, marginal striae and a central rosette. Unlike other elliptical forms, the central area is always more or less circular . The nearest similar species is C. rhomboideo-elliptica .

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ELEKTRONENMIKROSKOPISCHE UNTERSUCHUNGEN AN DEM TYPUSMATERIAL DER ZENTRISCHEN KIESELALGECYCLOTELLA STELLIGERACLEVE ET GRUNOW

Cited by 9 publications

References 5 publications

Discostellataxa (Bacillariophyta) from the Río Limay basin (northwestern Patagonia, Argentina)

Discostellataxa (Bacillariophyta) from the Río Limay basin (northwestern Patagonia, Argentina)

Topical observations on centric diatoms (Bacillariophyceae, Centrales) of Lake Como (N. Italy)

Morphology and taxonomy of Cyclotella tasmanica spec. nov, a newly described diatom from Tasmanian lakes

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