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Lake Salda has a unique environment due to the presence of hydromagnesite stromatolites. Samples collected from the stromatolites contained a new diatom species,  Gomphonella saldanensis  sp. nov . , which is described based on light and scanning electron microscopy. The main character of the taxon is its linear-lanceolate outline with a rostrate headpole and narrowly rounded footpole. The striae are strongly radiate mid-valve, becoming parallel to slightly radiate towards the poles. Elliptical Fourier and Linear Discriminant analyses indicate that there are different shape forms within the same taxon. Based on LM observations,  G. saldanensis  is similar to  Gomphonema lagerheimii  f.  simplex ,  G. geisslerae, Gomphonella calcarea, G. olivacea, G. acsiae  and  G. coxiae . However,  G. lagerheimii  f.  simplex  differs with slightly radiate striae throughout the valve.  Gomphonella geisslerae  has a slightly undulate raphe and linear apices. Larger specimens of  G. acsiae  are lanceolate, clavate in smaller specimens. The remaining  Gomphonella  species,  G. calcarea, G. coxiae  and  G. olivacea  have broader outlines and lower stria densities.

Description of Gomphonella saldanensis sp. nov. (Bacillariophyceae) from hydromagnesite stromatolites in Salda Lake, Turkey