Morphological variability of new chrysophyte stomatocyst forming a single-cyst assemblage in a low-conductivity tropical lake in the Guineo-Congolian rainforest

Piątek, Jolanta; Piątek, Marcin

doi:10.11646/phytotaxa.174.5.2

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…Stomatocysts are formed in response to endogenous or exogenous signals, ensuring the preservation of the chrysophyte population [94]. Currently, about 2000 morphotypes of stomatocysts have been described from different regions of the world [95], and only a small number (10-15%) of them are correlated with the vegetative stage [96][97][98]. Stomatocysts, along with other siliceous structures such as scales and bristles, are widely used in paleolimnological studies [95,96].…”

Section: Discussionmentioning

confidence: 99%

Diversity of Silica-Scaled Chrysophytes in the Steppe Zone of the Southern Urals with a Description of a New Species from the Genus Mallomonas

Ignatenko,

Gusev,

Yatsenko-Stepanova

2023

Life

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This paper is devoted to the study of the flora of silica-scaled chrysophytes in water bodies of the steppe zone of the Southern Urals (Russia). Twenty-four taxa were identified via scanning and transmission electron microscopy, twenty of which are representatives of the genus Mallomonas Perty, while four are species of the genus Synura Ehrenberg. In the course of the study, a species new to science from the genus Mallomonas, M. baturinae sp. nov., was described. This species belongs to the section Papillosae. The stomatocyst of M. doignonii was described. For the first time in Russia and for the third time since description, M. phasma and M. solea-ferrea var. irregularis were reported in the studied area. Here, their extended description is provided with illustrations of their scales in detail. Some rare taxa for the flora of Russia have been identified: M. doignonii, M. pillula f. exannulata, and M. pillula f. valdiviana. One taxon of the genus Mallomonas has not been identified to a species level and is probably a taxon new to science.

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Section: Discussionmentioning

confidence: 99%

Diversity of Silica-Scaled Chrysophytes in the Steppe Zone of the Southern Urals with a Description of a New Species from the Genus Mallomonas

Ignatenko,

Gusev,

Yatsenko-Stepanova

2023

Life

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“…Two other cysts, stomatocysts 78, Duff & Smol 1991 31 and 233, Zeeb et al 44 are similar morphologically and could be produced by closely related Dinobryon species 7 . It is also not excluded that they all are produced by Dinobryon cylindricum but represent three developmental phases: immature stomatocyst, slightly immature stomatocyst and mature stomatocyst 14,45 .…”

Section: Discussionmentioning

confidence: 99%

Assessing morphological congruence in Dinobryon species and their stomatocysts, including a newly established Dinobryon pediforme–stomatocyst connection

Piątek

Lenarczyk

Piątek

2020

Sci Rep

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The chrysophyte genus Dinobryon Ehrenberg consists of 44 taxa, which occur in freshwaters, rarely marine waters, mostly in temperate regions of the world. The taxa of Dinobryon produce characteristic solitary or dendroid colonies and resting stages called stomatocysts. Only 20 Dinobryon taxa have information on produced stomatocysts and only four stomatocysts are reliably linked with vegetative stages using modern identification standards employing scanning electron microscopy (SEM) analyses. In this study, an encysted material of Dinobryon pediforme (Lemmermann) Steinecke was collected in two lakes in contrasting regions of Poland. Light microscopy (LM) and scanning electron microscopy (SEM) analyses revealed that Dinobryon pediforme produces stomatocyst #61, Piątek J. that is described here as new morphotype following the International Statospore Working Group (ISWG) guidelines. This raises to five the number of reliable links between vegetative stages of Dinobryon species and corresponding stomatocysts. Phenotypic similarities between Dinobryon species and their stomatocysts, analysed for five reliably established links, showed no relationships in size and shape between loricas and stomatocysts belonging to the same species. The morphological characters of loricas and stomatocysts mapped onto the phylogenetic tree of the five Dinobryon species revealed only little congruence between their morphology and phylogenetic relationships.

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“…representing the first finding of an encysted chrysophyte in Africa (Piątek et al 2012), as well as a new chrysophyte stomatocyst (stomatocyst 49 J. Piątek & Piątek 2014). Another chrysophyte, an unknown species of Mallomonas Perty, was found in material collected from a shallow puddle in the Guineo-Congolian rainforest.…”

Section: Introductionmentioning

confidence: 89%

Mallomonas Camerunensis Sp. Nov. (Chrysophyceae, Stramenopiles) From A Shallow Puddle In The Guineo-Congolian Rainforest (Cameroon)

Piątek

2015

Polish Botanical Journal

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Abstract.A new silica-scaled chrysophyte species, Mallomonas camerunensis J. Piątek, is described and illustrated from a shallow puddle in the Guineo-Congolian rainforest in Cameroon. This species belongs to section Papillosae and series Papillosa. differs from them in several morphological characters warranting recognition as a distinct species. The dome of M. camerunensis is clearly delimited and ornamented with papillae and ribs. The scales lack an anterior submarginal rib, while the posterior rim and V-rib are smooth and unornamented. The shield is thickly ornamented with papillae (18-22 papillae per scale width). The species is described and illustrated using light microscopy and scanning electron microscopy.

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Morphological variability of new chrysophyte stomatocyst forming a single-cyst assemblage in a low-conductivity tropical lake in the Guineo-Congolian rainforest

Cited by 10 publications

References 23 publications

Diversity of Silica-Scaled Chrysophytes in the Steppe Zone of the Southern Urals with a Description of a New Species from the Genus Mallomonas

Diversity of Silica-Scaled Chrysophytes in the Steppe Zone of the Southern Urals with a Description of a New Species from the Genus Mallomonas

Assessing morphological congruence in Dinobryon species and their stomatocysts, including a newly established Dinobryon pediforme–stomatocyst connection

Mallomonas Camerunensis Sp. Nov. (Chrysophyceae, Stramenopiles) From A Shallow Puddle In The Guineo-Congolian Rainforest (Cameroon)

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