Gomphonema cf. capitatum Ehrenberg, 1838

Kulikovskiy, Maxim S., Kociolek, John P., Solak, Cüneyt N. & Kuznetsova, Irina, 2015, The diatom genus Gomphonema Ehrenberg in Lake Baikal. II. Revision of taxa from Gomphonema acuminatum and Gomphonema truncatum-capitatum complexes, Phytotaxa 233 (3), pp. 251-272 : 262-263

publication ID

https://doi.org/ 10.11646/phytotaxa.233.3.3

DOI

https://doi.org/10.5281/zenodo.13633397

persistent identifier

https://treatment.plazi.org/id/1D2F1F2F-FF95-641E-FF10-F843FCC74AE1

treatment provided by

Felipe

scientific name

Gomphonema cf. capitatum Ehrenberg
status

 

Gomphonema cf. capitatum Ehrenberg ( Figs 244–255 View FIGURES 228–255 , 299–301 View FIGURES 298–301 )

Valves clavate, swollen at the center. Central undulation slightly lager than headpole. Length: 30–38 μm, breadth: 9.3–10.7 μm. Headpole is broadly rounded, capitate, with fooptopole narrower. Axial area is narrow. Central area small, rectangular. Raphe lateral, undulate. Stigma isolated and distinct. Striae punctate, radiate, more radiate at the footpole, 11–12 in 10 μm. SEM: valve exterior shows striae with C - shaped opening of the areolae produced by volate occlusions ( Figs 299–301 View FIGURES 298–301 ). Raphe is undulate, with proximal ends slightly dilated, and distal ends deflected onto the mantle.

Observations: —This population is distinguished from G. capitatum as shown by Reichardt (2001) by its smaller size, more elongate shape, and lower number of striae in 10 μm.

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