Cymbella pamirensis Z.Zhang & Rioual, 2017

Zhang, Zhongyan, Rioual, Patrick, Peng, Yumei, Yang, Xiaoping, Jin, Zhangdong & Ector, Luc, 2017, Cymbella pamirensis sp. nov. (Bacillariophyceae) from an alpine lake in the Pamir Mountains, Northwestern China, Phytotaxa 308 (2), pp. 249-258 : 253

publication ID

https://doi.org/ 10.11646/phytotaxa.308.2.6

DOI

https://doi.org/10.5281/zenodo.13702460

persistent identifier

https://treatment.plazi.org/id/03B7A718-FF89-2263-FF4F-303EFBA2C4D6

treatment provided by

Felipe

scientific name

Cymbella pamirensis Z.Zhang & Rioual
status

sp. nov.

Cymbella pamirensis Z.Zhang & Rioual , sp. nov. ( Figs 2–34 View FIGURES 2–28 View FIGURES 29–34 )

LM observations ( Figs 2–28 View FIGURES 2–28 )

Valves strongly dorsiventral and triangular. Dorsal margin strongly arched. Ventral side nearly straight or slightly concave with slightly tumid center part. Ends variable from broadly round to weakly protracted. Valve dimensions (n=48): length 21 – 39 μm, width 7 – 10.5 μm, length/width ratio 2.6 – 4.3 (median 3.3), curvature value 0.038 – 0.083. Axial area linear, narrow, widening slightly at mid-valve on the dorsal side, almost in the middle of the valve. Central area generally lacking on the ventral side or very small ( Figs 27, 28 View FIGURES 2–28 ), but present dorsally where striae gradually shortened. Raphe branches lateral, becoming narrower near distal ends GoogleMaps ; terminal fissures curved dorsally. Striae moderately radiate in middle of valve. No isolated stigmata discernible under the LM.

Kingdom

Chromista

Phylum

Ochrophyta

Class

Bacillariophyceae

SubClass

Bacillariophycideae

Order

Cymbellales

Family

Cymbellaceae

Genus

Cymbella

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