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New and interesting Luticola species (Bacillariophyta) from the mangroves of Nosy Be Island, NW Madagascar Cover

New and interesting Luticola species (Bacillariophyta) from the mangroves of Nosy Be Island, NW Madagascar

Oceanological and Hydrobiological Studies
Volume 48 (2019): Issue 1 (March 2019)
By: Małgorzata Bąk,  Adrian Kryk,  Łukasz Peszek,  John P. Kociolek,  John Bemiasa and  Etienne Bemanaja  
Open Access
|Mar 2019

Figures & Tables

Figure 1

Nosy Be Island with the diatom sampling site (NB 4a)
Nosy Be Island with the diatom sampling site (NB 4a)

Figure 2a–am

Luticola nosybeana sp. nov. LM images. Valve views, showing variation in size and outline. Fig. 2p presents the holotype. Scale bar = 10 µm
Luticola nosybeana sp. nov. LM images. Valve views, showing variation in size and outline. Fig. 2p presents the holotype. Scale bar = 10 µm

Figure 3a–f

Luticola nosybeana sp. nov. SEM images. External valve views. Figs 3a–d: whole valve with straight axial area, expanded at the center to form a wide, asymmetrical, deltoid or rectangular fascia and isolated pore opening (arrow in Fig. 3b). Fig. 3e: proximal raphe endings, hooked to the side opposite the isolated pore, continuing with irregular, shallow, T-shaped or L-shaped grooves. Note the presence of a few slit-like or elliptic irregular surface depressions (“ghost areolae”) within the central area (arrow). Fig. 3f: distal raphe end curved and not extending onto the mantle
Luticola nosybeana sp. nov. SEM images. External valve views. Figs 3a–d: whole valve with straight axial area, expanded at the center to form a wide, asymmetrical, deltoid or rectangular fascia and isolated pore opening (arrow in Fig. 3b). Fig. 3e: proximal raphe endings, hooked to the side opposite the isolated pore, continuing with irregular, shallow, T-shaped or L-shaped grooves. Note the presence of a few slit-like or elliptic irregular surface depressions (“ghost areolae”) within the central area (arrow). Fig. 3f: distal raphe end curved and not extending onto the mantle

Figure 4a–f

Luticola nosybeana sp. nov. SEM images. Internal valve views. Figs 4a, 4b, 4d: whole valve views with the marginal canal and isolated pore. Fig. 4c: distal raphe branch terminating in small helictoglossa (arrow). Fig. 4e: close-up of the valve interior showing the hymenate occlusions of areolae (arrow) and the marginal narrow channel, located at the valve face/mantle junction (arrowhead). Fig. 4f: central area with a small, round isolated pore opening covered by large, triangular structure (arrow)
Luticola nosybeana sp. nov. SEM images. Internal valve views. Figs 4a, 4b, 4d: whole valve views with the marginal canal and isolated pore. Fig. 4c: distal raphe branch terminating in small helictoglossa (arrow). Fig. 4e: close-up of the valve interior showing the hymenate occlusions of areolae (arrow) and the marginal narrow channel, located at the valve face/mantle junction (arrowhead). Fig. 4f: central area with a small, round isolated pore opening covered by large, triangular structure (arrow)

Figure 5a–p

Luticola madagascarensis sp. nov. LM images. Valve views, showing size diminution series. Fig. 5f presents the holotype. Scale bar = 10 µm
Luticola madagascarensis sp. nov. LM images. Valve views, showing size diminution series. Fig. 5f presents the holotype. Scale bar = 10 µm

Figure 6a–f

Luticola madagascarensis sp. nov. SEM external valve views. Figs 6a, 6b, 6d: entire valve showing a narrow axial area expanded at the center to form a wide symmetrical, bow-tie shaped fascia on both valve margins. A single isolated pore (arrow in Fig. 6a) is present. Figs 6c, 6f: distal raphe fissures hooked on the same side, extending to the valve mantle. Fig. 6e: proximal raphe endings hooked to the opposite side of the isolated pore, continuing with irregular, shallow, elongated, L-shaped grooves (arrow)
Luticola madagascarensis sp. nov. SEM external valve views. Figs 6a, 6b, 6d: entire valve showing a narrow axial area expanded at the center to form a wide symmetrical, bow-tie shaped fascia on both valve margins. A single isolated pore (arrow in Fig. 6a) is present. Figs 6c, 6f: distal raphe fissures hooked on the same side, extending to the valve mantle. Fig. 6e: proximal raphe endings hooked to the opposite side of the isolated pore, continuing with irregular, shallow, elongated, L-shaped grooves (arrow)

Luticola species reported from the region in the vicinity of Madagascar

SpeciesSourceRegionComments
L. rhombica(S.J.C.Zimmermann) Levkov, Metzelti n & A.Pavlov 2013: 208TanzaniaColl. F. Fricke
L. frickeiLevkov, Metzeltin & A.Pavlov 2013: 114TanzaniaColl. F. Fricke
L. gesierichiaeLevkov, Metzeltin & A.Pavlov 2013: 119TanzaniaColl. F. Fricke
L. hustedti iLevkov, Metzeltin & A.Pavlov 2013: 131TanzaniaColl. Leg. B. Schröder
L. kraeuselii(Cholnoky) Metzeltin & Lange-Bertalot 1998: 139South AfricaAcc. No. MKNDC 6283
L. disti nguenda(Hustedt) Levkov, Metzelti n & A. Pavlov 2013: 106South AfricaAcc. No. MKNDC 6396
L. tropicaLevkov, Metzeltin & A.Pavlov 2013: 241South Africa, Indonesia–
L. novaeguineaensis(Tempère) Levkov, Metzelti n & A.Pavlov 2013: 177New Guinea, SumatraColl. Adams

Physicochemical parameters of water recorded at the study site on Nosy Be Island during sampling

Temp. °CpHORP mVDO mg l−10%TDS mg l−1Salinity PSUAtm. pressure mbar
32.46.9−1046.6764415.31016.5
DOI: https://doi.org/10.1515/ohs-2019-0002 | Journal eISSN: 1897-3191 | Journal ISSN: 1730-413X
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Language: English
Page range: 13 - 22
Submitted on: Mar 1, 2018
Accepted on: Jul 10, 2018
Published on: Mar 14, 2019
Published by: University of Gdańsk
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Bacillariophyta,
diatoms,
Madagascar,
Luticola,
new species
Related subjects:
Chemistry,
Chemistry, other,
Geosciences,
Geosciences, other,
Life sciences,
Life sciences, other

© 2019 Małgorzata Bąk, Adrian Kryk, Łukasz Peszek, John P. Kociolek, John Bemiasa, Etienne Bemanaja, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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