Is Sellaphora the New Navicula? Cymbosellaphora (Cymbellales), a New Genus Based on Taxa Previously Assigned to Sellaphora
Abstract
:1. Introduction
- (1)
- Striae that are uniseriate or biseriate, radiate, or parallel;
- (2)
- A nonporous conopeum that can be present adjacent to the axial area;
- (3)
- A flat valve face that curves fairly gently into shallow or moderately deep mantles;
- (4)
- Striae that contain small round poroids, which are occluded near their internal apertures by hymenes;
- (5)
- A central and straight raphe system, with distal raphe ends deflected or hooked;
- (6)
- A central external raphe endings that are expanded and slightly deflected towards the primary side;
- (7)
- A central internal raphe endings turned or deflected towards the primary side;
- (8)
- The presence of helictoglossae.
2. Results and Discussion
3. Conclusions
4. Materials and Methods
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Cymbosellaphora vietnamensis sp. nov. | Cymbosellaphora absoluta comb. nov. | Cymbosellaphora circumborealis comb. nov. | Cymbosellaphora geisslerae comb. nov. | Cymbosellaphora laterostrata comb. nov. | |
---|---|---|---|---|---|
References | This study | [36,37,38,39]; This study | [40]; This study | [25,40,41]; This study | [37,38,40,41,42] |
Distribution | Vietnam; Ba Bể Lake | Holarctic; Central Europe; Mongolia | Holarctic: Europe; North America; Canada; Mongolia | Europe; Canada; Russia | Europe; Russia; Mongolia |
Outline | Almost liner to linear–elliptic, naviculoid, slightly dorsiventral in longer cells with broadly protracted ends | Elliptic–lanceolate with drawn out, obtusely rounded rostrate to subcapitate ends | Linear–lanceolate or elliptical–lanceolate or lanceolate | Narrow–elliptical with protracted and broadly rounded poles | Linear–elliptic with subcapitate ends |
Axial area | Narrow, straight | Narrow | Very narrow | Narrow | Narrow |
Central area | Variable, small to medium-size, transversely widened and irregularly delimited | Variable, small-to-medium size, transversely widened, and irregularly delimited | Transversely expanded and bordered by 1, 2, and rarely 3 very short striae | Transversely expanded and bordered by 1–4 very short striae | Variable, formed by short striae |
Valve length (μm) | 10.7–31.4 | 10–20 | 9–18 | 8.9–27.6 | 22.9–31.0 |
Valve breadth (μm) | 5.0–6.7 | 4.5–6.0 | 4.2–5.5 | 4.0–6.6 | 7.1–8.8 |
Striae in 10 μm | 14–16 | 25–28 | 17–20 | 18–25 | 18.5–20.4 |
Areolae in 10 μm | 35–40 | 25–30 | 35–40 | 30.7–38.7 | 24.8–31.1 |
Sample No | Slide No | Locality | Coordinates | Substratum | Cond., µS/cm | pH | t, °C | Collection of Date |
---|---|---|---|---|---|---|---|---|
Vietnam | ||||||||
BB9 | 02151 | Ba Bể Lake, Bắc Kạn Province | 22°23.605′ N; 105°36.856′ E | benthos a depth of 3 m | 26 | 8.5 | 174 | 29 April 2015 |
Mongolia | ||||||||
Mn079 | 02431 | Davaa Lake | 48°10.803′ N; 98°46.107′ E | benthos | 20 | 8.1 | 13 | 8 July 2015 |
Mn088 | 02440 | Davaa Lake | 48°10.827′ N; 98°45.828′ E | sand | 20 | 6.9 | 13 | 8 July 2015 |
Mn089 | 02441 | Davaa Lake | 48°10.827′ N; 98°45.828′ E | sand | 20 | 6.9 | 13 | 8 July 2015 |
Mn090 | 02442 | Davaa Lake | 48°10.827′ N; 98°45.828′ E | stone and sand | 20 | 6.9 | 13 | 8 July 2015 |
Mn093 | 02445 | Davaa Lake | 48°10.827′ N; 98°45.828′ E | periphyton | 20 | 6.9 | 13 | 8 July 2015 |
Mn094 | 02446 | Davaa Lake | 48°11.145′ N; 98°45.746′ E | bottom sediment a depth of 2.5 m | 38 | 7.7 | 15 | 8 July 2015 |
Mn095.1 | 02447 | Davaa Lake | 48°11.145′ N; 98°45.746′ E | bottom sediment a depth of 4 m | 38 | 7.7 | 15 | 8 July 2015 |
Mn095.5 | 02451 | Davaa Lake | 48°11.145′ N; 98°45.746′ E | bottom sediment a depth of 4 m | 38 | 7.7 | 15 | 8 July 2015 |
Mn104 | 02457 | Unnamed river flowing out of the Davaa Lake | 48°10.791′ N; 98°46.272′ E | periphyton | 38 | 7.7 | 15 | 8 July 2015 |
Mn289.1 | 02642 | Unnamed Lake near the Khövsgöl Lake, separated by a sandbar | 50°59.165′ N; 100°42.514′ E | bottom sediment a depth of 5 m | 100 | 8.9 | 18 | 28 July 2015 |
Mn312 | 02663 | Khövsgöl Lake | 50°47.215′ N; 100°31.837′ E | periphyton | 243 | 8.6 | 12 | 28 July 2015 |
Mn335.8 | 02684 | Khövsgöl Lake, Heeguer Bay | 50°38.641′ N; 100°31.397′ E | benthos | 304 | 10.6 | 22 | 22 July 2015 |
Mn308 | 02695 | Khövsgöl Lake | 50°47.215′ N; 100°31.837′ E | periphyton | 243 | 8.6 | 12 | 28 July 2015 |
Mn283.2 | 03009 | Khövsgöl Lake, Boreug Bay | 50°59.380′ N; 100°42.507′ E | benthos | 236 | 8.7 | 11.5 | 21 July 2015 |
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Kulikovskiy, M.S.; Glushchenko, A.M.; Genkal, S.I.; Kuznetsova, I.V.; Maltsev, Y.I.; Kociolek, J.P. Is Sellaphora the New Navicula? Cymbosellaphora (Cymbellales), a New Genus Based on Taxa Previously Assigned to Sellaphora. Plants 2023, 12, 3890. https://doi.org/10.3390/plants12223890
Kulikovskiy MS, Glushchenko AM, Genkal SI, Kuznetsova IV, Maltsev YI, Kociolek JP. Is Sellaphora the New Navicula? Cymbosellaphora (Cymbellales), a New Genus Based on Taxa Previously Assigned to Sellaphora. Plants. 2023; 12(22):3890. https://doi.org/10.3390/plants12223890
Chicago/Turabian StyleKulikovskiy, Maxim S., Anton M. Glushchenko, Sergei I. Genkal, Irina V. Kuznetsova, Yevhen I. Maltsev, and John Patrick Kociolek. 2023. "Is Sellaphora the New Navicula? Cymbosellaphora (Cymbellales), a New Genus Based on Taxa Previously Assigned to Sellaphora" Plants 12, no. 22: 3890. https://doi.org/10.3390/plants12223890