Luticola insularis M.Rybak & Peszek, 2024
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publication ID |
https://dx.doi.org/10.3897/phytokeys.237.113773 |
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persistent identifier |
https://treatment.plazi.org/id/0B582ED2-9B19-56F6-B44A-70D88CDC2E81 |
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treatment provided by |
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scientific name |
Luticola insularis M.Rybak & Peszek |
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sp. nov. |
Luticola insularis M.Rybak & Peszek sp. nov.
Figs 1A-S View Figure 1 , 4A-H View Figure 4
Description.
LM observations (Fig. 1A-S View Figure 1 ). Valves elliptic-lanceolate to lanceolate with narrowly rounded apices. Range of valve dimensions (n = 35): 8.5-24.0 μm long, 4.5-7.0 μm wide and 16-20 striae in 10 µm. Striae clearly punctate, composed of 3-4 areolae. Central area rectangular to slightly bow-tie shaped axial area linear and narrow Isolated pore clearly visible in central area located halfway between the margin and the centre. Raphe filiform with proximal endings slightly bent away from isolated pore, distal raphe endings barely visible.
SEM observations (Fig. 4A-H View Figure 4 ). External view: Striae composed of 3-4 areolae round, becoming larger and more elongated near the margins (Fig. 4A-E View Figure 4 ). Single row of elongated areolae, interrupted at valve apices, present on valve mantle (Fig. 4D, F View Figure 4 ). Central area bordered by 2-3 areolae (Fig. 4A-D View Figure 4 ). Raphe filiform with weakly hooked distal ends continuing on to valve mantle (Fig. 4A, C-E View Figure 4 ). Proximal raphe ends slightly bent opposite to the isolate pore bearing side, then shortly hooked to the pore and finishing with a small, elongated shallow depressions (Fig. 4B, D, E View Figure 4 ). Opening of isolated pore small and slightly elongated (Fig. 4A-D View Figure 4 ). Girdle bands open with two rows of poroids (Fig. 4D, F View Figure 4 ). Distinct silica ridge visible along valve face/mantle junction (Fig. 1D, F View Figure 1 ).
Internal view: Areolae occluded by hymenes forming a continuous strip (Fig. 4G, H View Figure 4 ). Raphe slits straight (Fig. 4G, H View Figure 4 ). Proximal raphe endings simple and straight (Fig. 4G, H View Figure 4 ), distal raphe endings finishing on to weakly developed helictoglossae (Fig. 4G, H View Figure 4 ). Isolated pore opening with small lipped structure (Fig. 4G, H View Figure 4 ). Longitudinal channels visible along valve (Fig. 4G, H View Figure 4 ).
Type.
Indonesia, Banda Besar, 4°31'29.93"S, 129°56'51.69"E, 19 m a.s.l., coll. 23 June 2018, holotype slide no. SZCZ29103! and the unmounted material with the same number in the Szczecin Diatom Collection (University of Szczecin, Poland), isotype slide no. 2018/440 and the unmounted material with the same number at the University of Rzeszów GoogleMaps , Poland. The type population is illustrated in Figs 1A-S View Figure 1 , 4A-H View Figure 4 .
Etymology.
The name refers to the fact that the species was found on one of many Asian islands (lat. insula - island).
Distribution.
So far, this species has been observed only in the type locality.
Ecology and associated diatom flora.
The species was observed in a sample characterised by a slightly acidic pH (5.8) and conductivity was 1250 µS /cm. The species described herein co-occurred with: Luticola bandanensis sp. nov., L. elliptica sp. nov., L. minima Levkov, Metzeltin & Pavlov, two unidentified small-celled Nitzschia sp., Nitzschia vitrea G.Norman and Tryblionella debilis Arnott ex O’Meara.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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