New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park
Here we present new records of diatoms for the algal flora of Ukraine from water bodies of Nyzhnosulsky National Nature Park. The following species are recorded for the first time in Ukraine: Achnanthidium eutrophilum, Caloneis biconstrictoides, Encyonema lacustre, Gomphonema angusticephalum, Karaye...
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irk-123456789-1768232021-02-09T01:26:44Z New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park Kryvosheia, O.M. Kapustin, D.O. Флористичні знахідки Here we present new records of diatoms for the algal flora of Ukraine from water bodies of Nyzhnosulsky National Nature Park. The following species are recorded for the first time in Ukraine: Achnanthidium eutrophilum, Caloneis biconstrictoides, Encyonema lacustre, Gomphonema angusticephalum, Karayevia kolbei, K. suchlandtii, Placoneis abiskoensis, P. paraelginensis, Stauroneis balatonis, and Tryblionella salinarum. Some of them are rare and noteworthy taxa. For Caloneis biconstrictoides, it is the third known record in the world; Placoneis abiskoensis is a rare Holarctic species. The reported records of the new, rare and interesting taxa in the investigated water bodies may indicate a high nature conservation significance of Nyzhniosulsky National Nature Park as an algal reserve. The taxonomic position, synonymy, morphological features, information about ecology, distribution and original photomicrographs are provided. У статті представлені дані щодо нових та цікавих видів діатомових водоростей флори України з водойм Національного природного парку "Нижньосульський". Види Achnanthidium eutrophilum, Caloneis biconstrictoides, Encyonema lacustre, Gomphonema angusticephalum, Karayevia kolbei, K. suchlandtii, Placoneis abiskoensis, P. paraelginensis, Stauroneis balatonis, Tryblionella salinarum є новими знахідками для флори України. Серед них є рідкісні та цікаві таксони. Для Caloneis biconstrictoides це третє місцезнаходження у світі, Placoneis abiskoensis є рідкісним голарктичним видом. Наявність нових, рідкісних та цікавих таксонів у досліджених водоймах засвідчує високе значення Національного природного парку "Нижньосульський" як альгорезервату зазначених видів. У статті наведено відомості про систематичне положення, синоніми, морфологічні характеристики, екологію і поширення виявлених видів та їхні оригінальні мікрофотографії. 2019 Article New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park / O.М. Kryvosheia, D.О. Kapustin // Український ботанічний журнал. — 2019. — Т. 76, № 6. — С. 554-559. — Бібліогр.: 30 назв. — англ. 0372-4123 DOI: https://doi.org/10.15407/ukrbotj76.06.554 http://dspace.nbuv.gov.ua/handle/123456789/176823 en Український ботанічний журнал Інститут ботаніки ім. М.Г. Холодного НАН України |
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Флористичні знахідки Флористичні знахідки Kryvosheia, O.M. Kapustin, D.O. New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park Український ботанічний журнал |
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Here we present new records of diatoms for the algal flora of Ukraine from water bodies of Nyzhnosulsky National Nature Park. The following species are recorded for the first time in Ukraine: Achnanthidium eutrophilum, Caloneis biconstrictoides, Encyonema lacustre, Gomphonema angusticephalum, Karayevia kolbei, K. suchlandtii, Placoneis abiskoensis, P. paraelginensis, Stauroneis balatonis, and Tryblionella salinarum. Some of them are rare and noteworthy taxa. For Caloneis biconstrictoides, it is the third known record in the world; Placoneis abiskoensis is a rare Holarctic species. The reported records of the new, rare and interesting taxa in the investigated water bodies may indicate a high nature conservation significance of Nyzhniosulsky National Nature Park as an algal reserve. The taxonomic position, synonymy, morphological features, information about ecology, distribution and original photomicrographs are provided. |
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Kryvosheia, O.M. Kapustin, D.O. |
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Kryvosheia, O.M. Kapustin, D.O. |
| author_sort |
Kryvosheia, O.M. |
| title |
New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park |
| title_short |
New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park |
| title_full |
New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park |
| title_fullStr |
New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park |
| title_full_unstemmed |
New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park |
| title_sort |
new records of diatoms for the algal flora of ukraine from water bodies of nyzhniosulsky national nature park |
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Інститут ботаніки ім. М.Г. Холодного НАН України |
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2019 |
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Флористичні знахідки |
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http://dspace.nbuv.gov.ua/handle/123456789/176823 |
| citation_txt |
New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky National Nature Park / O.М. Kryvosheia, D.О. Kapustin // Український ботанічний журнал. — 2019. — Т. 76, № 6. — С. 554-559. — Бібліогр.: 30 назв. — англ. |
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554 Ukrainian Botanical Journal, 2019, 76(6)
https://doi.org/10.15407/ukrbotj76.06.554
New records of diatoms for the algal flora of Ukraine from water bodies
of Nyzhniosulsky National Nature Park
Olha М. KRYVOSHEIA1, Dmytro О. KAPUSTIN2
1M.G. Kholodny Institute of Botany, NAS of Ukraine
2 Tereschenkivska Str., Kyiv 01004, Ukraine
olha_krivosheia@ukr.net
2Papanin Institute for Biology of Inland Waters RAS
Settle of Borok, Yaroslavl Region 152742, Russia
dima_kapustin@outlook.com
Kryvosheia О.М., Kapustin D.О.2019. New records of diatoms for the algal flora of Ukraine from water bodies of Nyzhniosulsky
National Nature Park. Ukrainian Botanical Journal, 76(6): 554–559.
Abstract. Here we present new records of diatoms for the algal flora of Ukraine from water bodies of Nyzhnosulsky
National Nature Park. The following species are recorded for the first time in Ukraine: Achnanthidium eutrophilum,
Caloneis biconstrictoides, Encyonema lacustre, Gomphonema angusticephalum, Karayevia kolbei, K. suchlandtii, Placoneis
abiskoensis, P. paraelginensis, Stauroneis balatonis, and Tryblionella salinarum. Some of them are rare and noteworthy
taxa. For Caloneis biconstrictoides, it is the third known record in the world; Placoneis abiskoensis is a rare Holarctic
species. The reported records of the new, rare and interesting taxa in the investigated water bodies may indicate a high
nature conservation significance of Nyzhniosulsky National Nature Park as an algal reserve. The taxonomic position,
synonymy, morphological features, information about ecology, distribution and original photomicrographs are provided.
Keywords: diatoms, new floristic records, Nyzhniosulsky National Nature Park, Poltava Plain Algofloristic District
Submitted 21 November 2018. Published 29 Desember 2019
Кривошея О.М.1, Капустін Д.О.2 2019. Нові знахідки діатомових водоростей для альгофлори України з водойм
Національного природного парку "Нижньосульський". Український ботанічний журнал, 76(6): 554–559.
1Інститут ботаніки ім. М.Г. Холодного НАН України
вул. Терещенківська 2, Київ 01004, Україна
2Інститут біології внутрішніх вод ім. І.Д. Папаніна РАН
сел. Борок, Ярославська обл. 152742, Росія
Реферат. У статті представлені дані щодо нових та цікавих видів діатомових водоростей флори України з водойм
Національного природного парку "Нижньосульський". Види Achnanthidium eutrophilum, Caloneis biconstrictoides,
Encyonema lacustre, Gomphonema angusticephalum, Karayevia kolbei, K. suchlandtii, Placoneis abiskoensis, P. paraelginensis,
Stauroneis balatonis, Tryblionella salinarum є новими знахідками для флори України. Серед них є рідкісні та цікаві
таксони. Для Caloneis biconstrictoides це третє місцезнаходження у світі, Placoneis abiskoensis є рідкісним голарктичним
видом. Наявність нових, рідкісних та цікавих таксонів у досліджених водоймах засвідчує високе значення
Національного природного парку "Нижньосульський" як альгорезервату зазначених видів. У статті наведено відомості
про систематичне положення, синоніми, морфологічні характеристики, екологію і поширення виявлених видів та
їхні оригінальні мікрофотографії.
Ключові слова: діатомові водорості, нові види, Нижньосульський національний природний парк, Полтавськорівнин-
ний альгофлористичний район
© 2019 О.М. Kryvosheia, D.О. Kapustin. Published by the M.G. Kholodny Institute of Botany, NAS of Ukraine. This is an open access article
under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution,
and reproduction in any medium, provided the original work is properly cited
Introduction
Although diatoms in Ukraine have been studied
for more than 150 years, considerable territories of
Ukraine remain poorly investigated until now. This is
the case especially for the Left-Bank Forest-Steppe of
Ukraine where, according to the literature data, only
350 species of diatoms have been reported (Algae of
Ukraine…, 2009). In particular, one of the interesting
areas in this respect is Nyzhniosulsky National Nature
Park (NSNNP), located in the lower reaches of the Sula
River in Poltava and Cherkasy regions. According to the
algofloristic zoning of Ukraine, this territory belongs
to the Poltava Plain Algofloristic District (Palamar-
Mordvintseva, Tsarenko, 2015). A complex of various
555Український ботанічний журнал, 2019, 76(6)
types of water bodies with different hydrological and
hydrochemical parameters are presented in NSNNP
(Nyzhniosulsky…, 2018). However, until now, data
on the algal flora of the park were limited and did not
represent the actual diversity of the diatom flora of this
territory (Kryvosheia, Kapustin, 2019).
During the study of diatoms of NSNNP we revealed
284 species (285 infraspecies taxa, incl. typical ones)
(Kryvosheia, Kapustin, 2019), including a number of
new and interesting species for the flora of Ukraine
which are presented in this article.
Materials and methods
Periphyton, plankton and benthos samples (38) from
various types of water bodies of Nyzhniosulsky National
Nature Park (N49°36′28′′, E33°11′27′′) were collected
during different seasons in 2016–2017. Samples
were fixed by 4% formaldehyde for later storage in
the National Herbarium of Ukraine (KW-A). For
diatom research, the samples were treated according
to a standard technique using concentrated 35% H
2
O
2
(Prygiel, Coste, 2000). The obtained frustules were
mounted in Naphrax® (refractive index 1.74) (Fleming,
Roy, 1943). In addition, this material was used for
scanning electron microscopy (SEM). Permanent slides
were studied using light microscopes MBI-6 with phase
contrast (LOMO, Russia), Olympus BX-53 (Olympus,
Japan) and a scanning electron microscope JEM-1230
(JEOL, Japan) at the Center for the Collective Use of
Electron Microscopes NASU.
Diatoms were identified using issues of
Süßwasserflora von Mitteleuropa (Krammer, 1986, 1991;
Krammer, Lange-Bertalot, 1989), other taxonomic
treatments (Krammer, 1997; Reichardt, 1999; Lange-
Bertalot et al., 2011, 2017; Bąk et al., 2012; Bey,
Ector, 2013a–d; Kulikovskiy et al., 2016), articles and
electronic sources (Cox, 2003; Levkov et al., 2007;
Levkov, Williams, 2014; Kulikovskiy et al., 2015, 2016;
Diatoms of North America..., 2018).
In the article we followed the system of Medlin and
Kaczmarska (2004) accepted in the series Algae of
Ukraine…(2009), with some updates (Kulikovskiy et al.,
2016).
Results and discussion
Ten species are newly reported for Ukraine. Their
taxonomic position, synonymy, morphological features,
information about ecology, distribution and original
photomicrographs are given below.
Class Bacillariophyceae
Subclass Bacillariophycidae
Order Cymbellales D.G.Mann
Family Cymbellaceae Greville
Encyonema lacustre (C.Agardh) Pantocsek (Fig. 1, A)
(= Schizonema lacustre C.Agardh, Colletonema
lacustre (C.Agardh) Kütz., Cymbella lacustris
(C.Agardh) Cleve, Navicula lacustris (C.Agardh)
Schütt).
Valves semi-lanceolate and dorsiventral. Valve apices
broadly rounded. Valve length 54.04 μm, valve width
12.49 μm, L/W 4.3. Axial area narrow, central area
small, circular. Proximal raphe ends curve slightly to
the dorsal margin. Striae radiate at the valve center and
become parallel, or even convergent, near the valve
apices, 11 in 10 μm.
Ecology. This species occurs in calcium-rich,
oligo- to eutrophic water bodies with elevated levels of
electrolytes, β-α-mesosaprobe (Lange-Bertalot et al.,
2011).
Locality. Benthos, the Orzhytsia River, urban-type
settlement of Orzhytsia, Orzhytsia District, Poltava
Region, NSNNP, August, 2016 (t 26 °C, pH 8.6).
Distribution. Widely distributed in Europe, North
and South America, Asia (AlgaeBase..., 2019).
Placoneis abiskoensis (Hust.) Lange-Bert. &
Metzeltin (Fig. 1, D)
(= Navicula abiskoensis Hust., N. dicephala f.
abiskoensis (Hust.) A.Cleve, N. dicephala f. abiskoensis
(Hust.) Hust.)
Valves linear, with weakly concave margins. Valve
margins triundulate in the largest specimens. Apices
sub-capitate. Valve length 43.85–47.76 μm, valve width
10.42–10.77 μm. Axial area very narrow and widens
slightly as it approaches a transversely rectangular
central area. Striae strongly curved and radiate except
at the ends, where they straight and parallel, 9–10 in
10 μm.
Ecology. This species seems to be a northern one, in
oligotrophic to mesotrophic lakes (Cox, 2003).
Locality. Plankton, the Sula River, Tarasivka village,
Orzhytsia District, Poltava Region, NSNNP, August,
2016 (t 24 °C, pH 8.6) and May, 2017 (t 15 °C, pH 8.3).
Distribution. Rare Holarctic species (Kulikovskiy
et al., 2016).
Note. According to E. Cox (2003), valves of this species have
a length of 36–46 μm, while we found specimens with longer
valves.
http://www.algaebase.org/search/species/detail/?species_id=39866
http://www.algaebase.org/search/species/detail/?species_id=39866
http://www.algaebase.org/search/species/detail/?species_id=39866
http://www.algaebase.org/search/species/detail/?species_id=145148
http://www.algaebase.org/search/species/detail/?species_id=145148
http://www.algaebase.org/search/species/detail/?species_id=145148
http://www.algaebase.org/search/species/detail/?species_id=145148
http://www.algaebase.org/search/species/detail/?species_id=145148
http://www.algaebase.org/search/species/detail/?species_id=145149
http://www.algaebase.org/search/species/detail/?species_id=145149
http://www.algaebase.org/search/species/detail/?species_id=145149
http://www.algaebase.org/search/species/detail/?species_id=145149
556 Ukrainian Botanical Journal, 2019, 76(6)
Placoneis paraelginensis Lange-Bert. (Fig. 1, E)
Valves linear, with somewhat convex margins.
Apices subcapitate. Valve length 28.28 μm, valve width
7.74 μm, L/W 3.7. Axial area very narrow and linear.
Central area transversely rectangular, occupies more
than ½ valve width. Striae radiate throughout the valve,
slightly wider apart at the centre of the valve, and shorter
in the central area, 12 in 10 μm.
Ecology. Recent and fossil freshwater (Cox, 2003),
occurs in waters with high level of mineralization and
low level of organic matter (Bey, Ector, 2013b).
Locality. Benthos, the Sula River, Maloseletske
village, Orzhytsia District, Poltava Region, NSNNP,
November 2016 (t 4 °C, pH 7).
Distribution. Widely distributed in Europe, North
and South America, Asia (AlgaeBase..., 2019).
Family Gomphonemataceae Kütz.
Gomphonema angusticephalum E.Reichardt &Lange-
Bert. (Fig. 1, B, C)
Valves heteropolar, broadest near the headpole but
tumid at the center of the valve. Valve length 30.12–
32.67 μm, valve width in the middle 4.62–5.13 μm, in
Fig. 1. New for Ukraine records of diatom species from Nyzhnosulsky National Nature Park
A: Encyonema lacustre; B, C: Gomphonema angusticephalum; D: Placoneis abiskoensis; E: P. paraelginensis; F, G: Caloneis
biconstrictoides; H, I: Stauroneis balatonis; J: Achnanthidium eutrophilum; K: Karayevia kolbei; L–N: K. suchlandtii;
O: Tryblionella salinarum
557Український ботанічний журнал, 2019, 76(6)
the headpole 5.53–6.17 μm. Axial area narrow, central
area small, rounded with one stigma. Striae parallel,
in the middle and on the ends of valves weakly radial,
12–14 in 10 μm.
Ecology. Freshwater species, sensitive to pollution
(Bey, Ector, 2013).
Locality. Periphyton, Drachkove Lake, Horoshyno
village, Orzhytsia District, Poltava Region, NSNNP,
August 2016 (t 26 °C, pH 7.7).
Distribution. France, Netherlands, USA
(AlgaeBase..., 2019), Russia (Kulikovskiy et al., 2015).
Family Achnanthales P.C.Siva
Родина Achnanthidiaceae D.G.Mann
Achnanthidium eutrophilum (Lange-Bert.) Lange-
Bert. (Fig. 1, J)
(= Achnanthes eutrophila Lange-Bert.)
Valve linear-elliptic with broadly rounded, non-
protracted apices. Valve length 9.69 μm, valve width
3.19 μm. Axial area narrow and linear gradually
expanding toward the valve center, central area weakly
developed. Striae radiate becoming denser and more
strongly radiate toward the apices, 30 in 10 μm. Striae
composed of 4–5 rounded areolae.
Ecology. Eutrophic to polyeutrophic running waters
(Lange-Bertalot et al., 2017).
Locality. Plankton, the Sula River, Tarasivka village,
Orzhytsia District, Poltava Region, NSNNP, February
2017 (t 0 °C, pH 7).
Distribution. Widely distributed in Europe; the most
abundant species after Achnanthidium minutissimum
s. str. (Lange-Bertalot et al., 2017).
Note. Probably this species is more widely distributed in
Ukraine but often erroneously identified as Achnanthidium
minutissimum s. l.
Order Naviculales Bessey sensu Round, Crawford &
D.G.Mann
Family Pinnulariaceae D.G.Mann
Caloneis biconstrictoides Levkov (Fig. 1, F, G)
Valves broadly lanceolate, gibbous in the middle,
with rounded and not protracted apices. Valve length
28.46–30.78 μm, valve width 9.23–10.0 μm. Axial area
narrow, widened near the central area. Central area
wide round, with large lunate thickened macula on both
sides of proximal raphe endings. Raphe distinctly lateral
with central pores deflected unilaterally. Striae weakly
radiate, 20 in 10 μm.
Ecology. Oligotraphentic species, which prefers
slightly alkaline waters (Levkov et al., 2007).
Locality. Plankton and benthos, the Sula River,
Maloseletske village, Orzhytsia District, Poltava
Region, NNPNS, August 2016 (t 24 °C, pH 8) and 2017
(t 24 °C, pH 7.6).
Distribution. North Macedonia (Levkov et al., 2007;
Levkov, Williams, 2014), Russia (Kulikovskiy et al.,
2016).
Note. With respect to its valve shape, it resembles Caloneis
silicula var. tumida Hust. differing from the latter mainly
by the presence of macula on the central area. Caloneis
schumanniana var. biconstricta (Grunow) Reichelt differs in
the valve shape with distinctly triundulated valve margins and
strongly protracted and cuneate apices.
Family Stauroneidaceae D.G.Mann1
Karayevia kolbei (Hust.) Bukht. (Fig. 1, K)
(= Achnanthes kolbei Hust., Kolbesia kolbei (Hust.)
Round & Bukht. nom. illeg.)
Valves elliptical-lanceolate. Apices short, rostrate.
Valve length 14.31 μm, valve width 5.82 μm. Axial area
narrow lanceolate, distinct central area lacking. Striae
radiate and interrupted by a marginal longitudinal line,
13 in 10 μm.
Ecology. Unlike K. ploenensis, this species occurs
mainly in alkaline, β-mesosaprobic rivers (Lange-
Bertalot et al., 2011).
Locality. Benthos, the Sula River, Maloseletske
village, Orzhytsia District, Poltava Region, NSNNP,
August 2017 (t 24 °C, pH 5,1).
Distribution. Widely distributed in Europe, North
America and Asia (AlgaeBase..., 2019).
Note. The valves shape of this species is similar to that in
K. ploenensis (Hust.) Bukht., but striae of the latter species
are not interrupted by a marginal longitudinal line (Lange-
Bertalot et al., 2011).
Karayevia suchlandtii (Hust.) Bukht. (Fig. 1, L, M, N)
(= Achnanthes suchlandtii Hust., A. lewisiana
R.M.Patrick, Cocconeis utermoehlii Hust., A. suchlandtii
var. robusta Hust., Kolbesia suchlandtii (Hust.)
J.C.Kingston).
Valves linear-elliptical. Valve length 7.3–9.2 μm,
valve width 3.89–4.37 μm. Axial area lanceolate.
Central area indistinct. Striae in the middle of the valves
almost parallel, becoming radiate toward apices, 18–20
in 10 μm.
Ecology. Occurs in oligotrophic waters; an indicator
of good water quality (Lange-Bertalot et al., 2011).
1 Genus Karayevia is included in a clade together with
stauroneoid diatom genera such as Stauroneis, Prestauroneis,
Craticula (Kulikovskiy et al., 2019).
http://www.algaebase.org/search/species/detail/?species_id=36020
http://www.algaebase.org/search/species/detail/?species_id=36020
http://www.algaebase.org/search/species/detail/?species_id=33142
http://www.algaebase.org/search/species/detail/?species_id=33142
http://www.algaebase.org/search/species/detail/?species_id=50093
http://www.algaebase.org/search/species/detail/?species_id=50093
http://www.algaebase.org/search/species/detail/?species_id=50093
http://www.algaebase.org/search/species/detail/?species_id=50093
http://www.algaebase.org/search/species/detail/?species_id=33292
http://www.algaebase.org/search/species/detail/?species_id=33292
http://www.algaebase.org/search/species/detail/?species_id=62986
http://www.algaebase.org/search/species/detail/?species_id=62986
http://www.algaebase.org/search/species/detail/?species_id=62986
http://www.algaebase.org/search/species/detail/?species_id=62986
http://www.algaebase.org/search/species/detail/?species_id=62986
http://www.algaebase.org/search/species/detail/?species_id=62986
http://www.algaebase.org/search/species/detail/?species_id=44406
http://www.algaebase.org/search/species/detail/?species_id=44406
http://www.algaebase.org/search/species/detail/?species_id=44406
558 Ukrainian Botanical Journal, 2019, 76(6)
Locality. Plankton and benthos, the Sula River,
Maloseletske village, Orzhytsia District, Poltava
Region, NSNNP, May 2017 (t 14 °C, pH 8,5).
Distribution. Widely distributed in Europe, North
and South America, Asia, Australia and New Zealand
(AlgaeBase..., 2019).
Stauroneis balatonis Pantocsek (Fig. 1, H, I)
Valves lanceolate, rhombic-lanceolate with short,
slightly protracted apices. Valve length 23.81–29.57 μm,
valve width 5.77–6.52 μm. Axial area very narrow,
slightly widened towards valve central area. Central area
with distinct stauros, narrow, not expanded towards
valve margins. Raphe fissures almost straight, filiform.
Transapical striae fine, indistinctly punctate, parallel to
weakly radiate, low-observable in LM.
Ecology. Freshwater species (AlgaeBase…, 2019).
Locality. Plankton and periphyton, the Sula River,
Maloseletske village, Orzhytsia District, Poltava
Region, NSNNP, August 2017 (t 24 °C, pH 7.6).
Distribution. This species was recorded only in lakes
Ohrid and Prespa (North Macedonia), where it occurs
in sediments from various water depths; it has a broad
distribution in Europe as a fossil (under the name
S. smithii var. incisa Pantocsek) (Levkov et al., 2016).
Order Bacillariales Hendey
Family Bacillariaceae Ehrenb.
Tryblionella salinarum (Grunow) Pantoscek (рис. 1, O)
(= Nitzschia salinarum Grunow, N. calida var.
salinarum (Grunow) Frenguelli, N. levidensis var.
salinarum (Grunow) Krammer & Lange-Bert.)
Valves broadly lanceolate, slightly concave in the
middle of the valve. Apices drawn out and narrowly
rounded. Valve length 37.72 μm, valve width 10.76 μm.
Keel strongly excentric, with the central nodule formed
by two fibulae. Fibulae 9 in 10 μm. Transapical ribs
distinct, 12 in 10 μm. Striae indistinct in LM.
Ecology. This species occurs in salt-water of sea coast,
brackish-water of river mouth and also in continental
waters with high content of electrolytes, α-mesosaprobe
(Lange-Bertalot et al., 2011).
Locality. Periphyton, the Sula River, Maloseletske
village, Orzhytsia District, Poltava Region, NSNNP,
November 2016 (t 4 °C, pH 7).
Distribution. Widely distributed in Europe and Asia
(AlgaeBase..., 2019).
Remark. The valves shape of this species is
similar to that of T. levidensis W.Smith and T. calida
(Grunow) D.G.Mann. However, T. levidensis has a
smaller number of support ribs (7–10 in 10 μm) and
T. calida has pronounced rostrate apices (Lange-
Bertalot et al., 2011).
Conclusions
Ten species of diatoms were recorded for the first time
in Ukraine. It is very likely that some of them have been
previously found but not distinguished from the similar
species. For instance, Gomphonema angusticephalum
and Achnanthidium eutrophilum were formerly lumped
under Gomphonema acuminatum Ehrenb. (Reichardt,
1999; Kulikovskiy et al., 2015) and Achnanthidium
minutissimum (Kütz.) Czarn. (Lange-Bertalot,
Metzeltin, 1996), respectively, and only recently were
recognized as separate species.
Other species (e.g. Encyonema lacustre, Placoneis
paraelginensis, Karayevia kolbei, K. suchlandtii,
Tryblionella salinarum) are widely distributed but they
have not been previously recorded in Ukraine due to the
lack of detailed investigations. It should be noted that
the record of T. salinarum, a species that prefers brackish
waters, in the Sula River indicates the high electrolyte
content of its waters. This conclusion is confirmed by
hydrochemical analysis (Aqualandscape..., 2014).
Moreover, we have recorded several rare diatom
species, such as Placoneis abiskoensis and Caloneis
biconstrictoides. Stauroneis balatonis has a few extant
records from lakes Ochrid and Prespa in North
Macedonia (Levkov et al., 2016) but it is widely
distributed in Europe and Asia as a fossil, known under
the name S. smithii var. incisa Pantocsek.
Generally, the presence of the new, rare and interesting
taxa in the water bodies of Nyzhniosulsky NNP may
indicate its high nature conservation significance as an
algal reserve.
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Рекомендує до друку С.Я. Кондратюк
https://diatoms.org
https://doi.org/10.15407/alg29.03.298
https://doi.org/10.1111/jpy.12810
https://doi.org/10.1111/jpy.12810
https://doi.org/10.1127/1438-9134/2014/008
https://doi.org/10.1127/1438-9134/2014/008
https://doi.org/10.5281/zenodo.162215
https://doi.org/10.5281/zenodo.162215
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