PUNCTASTRIATA GLUBOKOENSISSPEC. NOV., A NEW SPECIES OF ‘FRAGILARIOID’ DIATOM FROM LAKE GLUBOKOE, RUSSIA

Williams, David M.; Chudaev, D. A.; Gololobova, M. A.

doi:10.1080/0269249x.2009.9705814

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…Punctastriata glubokoensis es una especie elíptica heteropolar robusta pequeña con rangos de tamaño que varían entre 5,5 y 7 µm (Figura 3A). Fue descripta originalmente en el perifiton marginal del lago Glubokoe en Rusia (Williams et al, 2009). P. glubokoensis suele ser usualmente confundida mediante microscopía óptica con otras especies como Staurosira venter o Staurosirella pinnata (Paull et al, 2008;Morales et al, 2013;Vélez-Agudelo et al, 2017).…”

Section: Discusión Fragilarioides Fósiles Del Río Coloradounclassified

Diatomeas holocenas del delta del río Colorado, Argentina. Una aproximación paleoambiental a partir del estudio de “fragilarioides pequeñas”

Fayó

Espinosa

Isla

2020

Rev. bras. paleontol.

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Holocene diatoms of the Colorado River Delta, Argentina. A paleoenvironmental approach from the study of "small fragilarioids". Diatom assemblages of a sedimentary succession in the deltaic plain of the Colorado River (Argentina) were studied in order to reconstruct the paleoenvironmental conditions of the delta in response to Holocene sea-level changes. A 191 cm depth core was extracted by vibracoring from Las Isletas (LI), located 22 km from the coast (39°43'5.7"S, 62°20'49.7"W). A cluster analysis -CONISS of 35 subsamples defined three diatom zones (DZ). The sedimentary succession is dominated by small fragilarioids, being Punctastriata glubokoensis Williams, Chudaev & Gololobova the most abundant species; the accompanying flora included fresh-brackish and allochthonous marine-coastal taxa. At the base, subzone DZIA (191-163 cm, 7,315±64 14 C yr BP) included sandy lithological units and presented abundant marine-coastal species. The overlying subzone DZIB (163-96 cm) has low abundance of allochthonous marine species. The uppermost zone, DZII (96 cm from the top) integrate the silt-sandy lithological units, and it was deposited ca. 2,218±29 14 C yr BP. DZII lacked marine species. The LI sequence represents the infilling of a river-estuarine channel with tidal influence ca. 7,300 14 C yr BP that gradually evolved into a fresh-brackish river channel, similar to the current river, ca. 2,200 14 C yr BP. During the Middle Holocene transgression, the greatest marine influence would have transported coastal marine species upstream to the LI site; the increase of fluvial influence associated with the progradation of the delta lobe would have favored the ubiquity and persistence of the small fragilarioids in the fluvial-delta assemblages of the Colorado River during the last ca. 7,000 14 C yr BP.

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Section: Discusión Fragilarioides Fósiles Del Río Coloradounclassified

Diatomeas holocenas del delta del río Colorado, Argentina. Una aproximación paleoambiental a partir del estudio de “fragilarioides pequeñas”

Fayó

Espinosa

Isla

2020

Rev. bras. paleontol.

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“…nov. and P. glubokoensis. Regarding the production of spines, the latter species infrequently produces paired spines, but they grow side by side on the virga (Williams et al 2009).…”

mentioning

confidence: 99%

A new species of Punctastriata (Bacillariophyta, Fragilariophyceae) from temporary streams in southern Portugal

et al. 2021

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The genus Punctastriata D.M. Williams & Round (1988: 278) contains species that are difficult to identify under light microscopy (LM) (Wetzel & Ector 2021). Their striae are composed of several rows of minute areolae that open interiorly into a single depression. It is the shadow created by this depression under LM that closely resembles the striae in species of Staurosirella D.M. Williams & Round (1988: 274); striae that are often said to have a punch hole appearance (Morales & Manoylov 2006). Thus, scanning electron microscopy (SEM) is often required to confirm the presence of a species of Punctastriata in a sample.Besides the typical multiseriate striae, produced by the formation of multiple viminules in the entire striae (both of these are the defining feature of the genus), the species share all the remaining features with other small araphid genera lacking a rimoportula, such as the already mentioned Staurosirella, but also

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“…and new species are constantly being encountered and described (e.g. MoRales , 2002MoRales , 2005MoRales , 2006Manoylov et al 2003;MoRales & edlund 2003;sChMidt et al 2004;MoRales & Manoylov 2006;WilliaMs et al 2009;MoRales et al 2010aMoRales et al , b, c, 2012MoRales et al , 2013aCejudo-FigueiRas et al 2011). In this paper a new species, named here as Staurosira longwanensis, is described using light (LM) and scanning electron microscopy (SEM).…”

Section: Introductionmentioning

confidence: 99%

Staurosira longwanensis sp. nov., a new araphid diatom (Bacillariophyta) from Northeast China.

Rioual¹,

Morales²,

Chu³

et al. 2014

Fottea

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Staurosira longwanensis sp. nov. is described from Sihailongwan maar lake, northeast China. The morphology of this new species is documented with light and scanning electron micrographs and discussed in comparison with several small species of Fragilariaceae. Staurosira longwanensis belongs in the genus Staurosira since it shares many features with taxa currently ascribed to it such as the position and characteristics of the spines, the characteristics of the areolae and apical pore fields. Apart from the type locality, S. longwanensis also occurs in another volcanic lake in northeast China, with circumneutral and oligotrophic water. Diatom analysis of the long sedimentary record retrieved from Lake Sihailongwan indicates that S. longwanensis has been present at low relative abundances in this lake at least since the Late Pleistocene.

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PUNCTASTRIATA GLUBOKOENSISSPEC. NOV., A NEW SPECIES OF ‘FRAGILARIOID’ DIATOM FROM LAKE GLUBOKOE, RUSSIA

Cited by 9 publications

References 8 publications

Diatomeas holocenas del delta del río Colorado, Argentina. Una aproximación paleoambiental a partir del estudio de “fragilarioides pequeñas”

Diatomeas holocenas del delta del río Colorado, Argentina. Una aproximación paleoambiental a partir del estudio de “fragilarioides pequeñas”

<strong>A new species of <em>Punctastriata</em> (Bacillariophyta, Fragilariophyceae) from temporary streams in southern Portugal</strong>

Staurosira longwanensis sp. nov., a new araphid diatom (Bacillariophyta) from Northeast China.

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