Achnanthidium tinea Tseplik, Kulikovskiy, Kociolek & Maltsev, 2021
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publication ID |
https://dx.doi.org/10.3897/phytokeys.174.60337 |
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persistent identifier |
https://treatment.plazi.org/id/4E1EA69A-DF2C-5644-B985-D251F6AA213C |
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treatment provided by |
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scientific name |
Achnanthidium tinea Tseplik, Kulikovskiy, Kociolek & Maltsev |
| status |
sp. nov. |
Achnanthidium tinea Tseplik, Kulikovskiy, Kociolek & Maltsev sp. nov. Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3
Holotype.
Slide no 04133 in collection of MHA, Main Botanical Garden Russian Academy of Science , Moscow, Russia, represented here by Fig. 1E View Figure 1 .
Reference strain.
Sample Ind296, isolated in sample I 227.
Type locality.
Indonesia. Sulawesi Island, Temple Lake , periphyton, 04°06.923'N, 119°58.613'E, 5 m. elev., leg. I. I. Ivanov, 22.09.2010 GoogleMaps .
Description.
LM (Fig. 1A-R View Figure 1 ). Frustules rectangular in girdle view, raphe valve very slightly concave. Valves linear-elliptic with gradually narrowing ends. Length 14.7-17.5 µm (16.2 ± 0.9; n=17), breadth 4.0-5.0 µm (4.5 ± 0.3; n=17). The raphe valve possesses a straight filiform raphe, which lies in a narrow linear axial area. The central area is represented by a symmetrical butterfly-shaped fascia that reaches the valve margins on both sides. Striae on raphe valve strongly radiate, curved. The rapheless valve possesses a narrow lanceolate axial area. Central area absent, on some valves somewhat shorter striae in the center are present. Striae parallel in the center on the valve, slightly radiate near the valve ends.
SEM, external view (Figs 2A-C View Figure 2 , 3A View Figure 3 ). Central raphe ends are straight and drop-shaped (Fig. 2A View Figure 2 , white arrows). Distal raphe ends curve strongly to one side of the valve (Fig. 2A View Figure 2 , white arrowheads). Striae on the raphe valve 30-35 in 10 µm (32.5 ± 2.5 in 10 µm; n=4). Areolae elliptical or rounded in shape, approximately 40 in 10 µm. Striae on the rapheless valve 30-33 in 10 µm (31 ± 1.2 in 10 µm; n=4). Areolae small, also rounded or elliptical, approximately 50 in 10 µm. Shorter striae in the center are clearly visible in SEM; this often occurs only on one side of the valve (Fig. 3A View Figure 3 , white arrow).
SEM, internal view (Figs 2D View Figure 2 , 3B-D View Figure 3 ). Central raphe ends are simple and straight (Fig. 2D View Figure 2 , white arrows). Distal raphe ends terminate in helictoglossae (Fig. 2D View Figure 2 , white arrowheads). Shorter striae in the center are clearly visible in SEM, this often occurs only on one side of the valve (Fig. 3B, C View Figure 3 , white arrows).
Etymology.
Epithet refers to the butterfly-like shape of the fascia on the raphe valve of the new species; Achnanthidium tinea meaning moth in Latin.
Distribution.
As yet known only from type locality.
Molecular data (Fig. 4 View Figure 4 )
Our new species belongs to the large clade with monoraphid diatoms and sister clade with gomphocymbelloid diatoms. Strain A. tinea sp. nov. combined ( BI 100; ML 100) with two strains of A. minutissimum AW2 and Ashort2 and A. saprophilum D06-036. 15 other strains of A. minutissimum combined to form a sister branch together with three strains of A. digitatum and A. gladius Tseplik et al. Other monoraphid taxa from genera Pauliella , Psammothidium , Planothidium , Cocconeis , Lemnicola and Gogorevia spp. formed sister clades to the branch containing these Achnanthidium taxa in the molecular tree.
| MHA |
Main Botanical Garden of the Russian Academy of Sciences |
| LM |
Secçáo de Botânica e Ecologia |
| I |
"Alexandru Ioan Cuza" University |
| BI |
Istituto Ortobotanico |
| ML |
Musee de Lectoure |
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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