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Upsilococconeis dapalistriata gen. nov. & comb. nov. (Bacillariophyta) – a pantropical marine member of Cocconeidaceae

Catherine Riaux-Gobin
Catherine Riaux-Gobin
, 
Andrzej Witkowski
Andrzej Witkowski
, 
Yenny Risjani
Yenny Risjani
, 
Yunianta Yunianta
Yunianta Yunianta
, 
Véronique Berteaux-Lecellier
Véronique Berteaux-Lecellier
, 
Adrian Kryk
Adrian Kryk
, 
Łukasz Peszek
Łukasz Peszek
 oraz 
Genowefa Daniszewska-Kowalczyk
Genowefa Daniszewska-Kowalczyk
   | 31 mar 2022
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Article Category: Original research paper
Data publikacji: 31 mar 2022
Zakres stron: 23 - 31
Otrzymano: 15 cze 2021
Przyjęty: 05 lip 2021
DOI: https://doi.org/10.26881/oahs.2022.1.03
Słowa kluczowe
© 2022 Catherine Riaux-Gobin et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1a – h

Upsilococconeis dapalistriata. LM. Specimens from Komodo (Fig. 1a, from the paratype slide SZCZ26223). SV (a–d), SVVC (e–h). Scale bar: 10 μm.
Upsilococconeis dapalistriata. LM. Specimens from Komodo (Fig. 1a, from the paratype slide SZCZ26223). SV (a–d), SVVC (e–h). Scale bar: 10 μm.

Figure 2a – d

Upsilococconeis dapalistriata. SEM. SV. Specimens from Réunion (a–c), specimen from Komodo (d). Figs 2a–b. SV, epipsammic specimens with characteristic large SV areola pattern. Fig. 2c. External view of SV areola occlusion with silica crystal-like ornamentation (arrow). Fig. 2d. Internal view of SV areola hymenes. Scale bars: 5 μm (Fig. 2a), 4 μm (Fig. 2b), 600 nm (Fig. 2c), 500 nm (Fig. 2d).
Upsilococconeis dapalistriata. SEM. SV. Specimens from Réunion (a–c), specimen from Komodo (d). Figs 2a–b. SV, epipsammic specimens with characteristic large SV areola pattern. Fig. 2c. External view of SV areola occlusion with silica crystal-like ornamentation (arrow). Fig. 2d. Internal view of SV areola hymenes. Scale bars: 5 μm (Fig. 2a), 4 μm (Fig. 2b), 600 nm (Fig. 2c), 500 nm (Fig. 2d).

Figure 3a – b

Upsilococconeis dapalistriata. SEM. SV. Fig. 3a, external view (specimen from French Polynesia). Fig. 3b, internal view (specimen from Komodo). Scale bars: 3 μm (Figs 3a–b).
Upsilococconeis dapalistriata. SEM. SV. Fig. 3a, external view (specimen from French Polynesia). Fig. 3b, internal view (specimen from Komodo). Scale bars: 3 μm (Figs 3a–b).

Figure 4a – e

Upsilococconeis dapalistriata. SEM. SVVC. Specimens from New Caledonia. Fig. 4a–b, SVVC narrow (arrows). Fig. 4b, RV margin (twin arrowheads). Fig. 4c–e, SVVC ¼ of the valve, with underlying RV striation (Fig. 4d, arrowhead), SVVC arborescent fimbria edge (Fig. 4e). Scale bars: 3 μm (Figs 4c–d), 1 μm (Figs 4a–b, e).
Upsilococconeis dapalistriata. SEM. SVVC. Specimens from New Caledonia. Fig. 4a–b, SVVC narrow (arrows). Fig. 4b, RV margin (twin arrowheads). Fig. 4c–e, SVVC ¼ of the valve, with underlying RV striation (Fig. 4d, arrowhead), SVVC arborescent fimbria edge (Fig. 4e). Scale bars: 3 μm (Figs 4c–d), 1 μm (Figs 4a–b, e).

Figure 5a – b

Upsilococconeis dapalistriata. SEM. Extended SVVC. Specimens from Komodo. Fig. 5a, SVVC extended in advalvar view. Note the central void area (arrowheads). Fig. 5b, SVVC extended in abvalvar view. Note the central void area. Scale bars: 3 μm (Figs 5a–b).
Upsilococconeis dapalistriata. SEM. Extended SVVC. Specimens from Komodo. Fig. 5a, SVVC extended in advalvar view. Note the central void area (arrowheads). Fig. 5b, SVVC extended in abvalvar view. Note the central void area. Scale bars: 3 μm (Figs 5a–b).

Figure 6a – e

Upsilococconeis dapalistriata. SEM. RV. (Fig. 6a–c, specimen from New Caledonia; Figs 6d–e, specimen from Komodo). Fig. 6a, RV in external view. Fig. 6b, simple terminal raphe ending (arrowhead) and RV areola occlusion with radiate slits. Fig. 6c, leopard-like dots indicating the SVVC (arrowhead). Fig. 6d, RV in internal view, with low helictoglossae and small central area. Fig. 6e, helictoglossa. Scale bars: 3 μm (Figs 6a,d), 1 μm (Fig. 6e), 500 nm (Fig. 6c), 400 nm (Fig. 6b).
Upsilococconeis dapalistriata. SEM. RV. (Fig. 6a–c, specimen from New Caledonia; Figs 6d–e, specimen from Komodo). Fig. 6a, RV in external view. Fig. 6b, simple terminal raphe ending (arrowhead) and RV areola occlusion with radiate slits. Fig. 6c, leopard-like dots indicating the SVVC (arrowhead). Fig. 6d, RV in internal view, with low helictoglossae and small central area. Fig. 6e, helictoglossa. Scale bars: 3 μm (Figs 6a,d), 1 μm (Fig. 6e), 500 nm (Fig. 6c), 400 nm (Fig. 6b).

Figure 7a – b

Upsilococconeis dapalistriata. SEM. Extended RVVC in advalvar view. (Fig. 19, specimen from Komodo; Fig. 20, specimen from New Caledonia). Fig. 19, Note the radiate furrows corresponding to the underlying RV striae (arrow). Note the open additional cingular band (black ellipse). Fig. 20, Note the axial furrows indicating the underlying RV raphe (arrow). Note the marginal furrow with small structures (twin arrowheads). Scale bars: 3 μm (Figs 19–20).
Upsilococconeis dapalistriata. SEM. Extended RVVC in advalvar view. (Fig. 19, specimen from Komodo; Fig. 20, specimen from New Caledonia). Fig. 19, Note the radiate furrows corresponding to the underlying RV striae (arrow). Note the open additional cingular band (black ellipse). Fig. 20, Note the axial furrows indicating the underlying RV raphe (arrow). Note the marginal furrow with small structures (twin arrowheads). Scale bars: 3 μm (Figs 19–20).

Biometrics and main features of Upsilococconeis dapalistriata comb. nov. from Komodo Island (Eastern Indian Ocean), Mascarenes (Western Indian Ocean), French Polynesia & New Caledonia (South Pacific).

Upsilococconeis dapalistriata
n (SEM)Oceanic basinlengthwidthSV str.SVVC rows of poresRV str.RVVC rows of pores
15Komodo Island (Eastern Indian Ocean)8 – 165 – 1011 – 1411 – 183836 – 45
11 ± 37 ± 112 ± 113 ± 340 ± 4
13Mascarenes (Western Indian Ocean)12 – 157 – 1011 – 16-40-
13 ± 18 ± 114 ± 2
12French Polynesia & New Caledonia (South Pacific)8 – 134 – 1012 – 2012 – 1338 – 5243
12 ± 27 ± 114 ± 312 ± 143 ± 8
eISSN:
1897-3191
Język:
Angielski
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