Gomphonema microlaticollum Kulikovskiy, Kociolek & Solak, 2015

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 : 260

publication ID

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

DOI

https://doi.org/10.5281/zenodo.13633379

persistent identifier

https://treatment.plazi.org/id/1D2F1F2F-FF97-641B-FF10-FF73FEE04FEF

treatment provided by

Felipe

scientific name

Gomphonema microlaticollum Kulikovskiy, Kociolek & Solak
status

sp. nov.

Gomphonema microlaticollum Kulikovskiy, Kociolek & Solak , sp. nov. ( Figs 176–190 View FIGURES 167–186 View FIGURES 187–227 , 282–288 View FIGURES 281–285 View FIGURES 286–291 )

Valves clavate, slightly swollen at the center of the valve, strongly asymmetrical to the transverse axis. Length: 14.0–25.3 μm, breadth: 7.3–8.7 μm. Headpole truncate, broadly rounded and narrower footpole. Axial area is narrow. Central area small, with striae on each side of the central area irregularly longer and shorter. A stigma is present in the central area close to the proximal raphe endings. Striae punctuate, distinctly radiate, 13–14 in 10 μm. SEM: Valves externally with punctate to doubly punctate striae, ending in a single areola at the axial area. Areolae with C - shaped occlusions ( Figs. 282–285 View FIGURES 281–285 ). Raphe strongly undulate. Proximal raphe ends dilated, while stigma opening is small and round. Internally, there is a narrow pseudoseptum and helicoglossae at the poles ( Figs 286–288 View FIGURES 286–291 ).

Type: — RUSSIA. Lake Baikal: pool near bay, fouling on tree submerged in water, 52º 27.042’ N, 106º 53.215’ E, M. Kulikovskiy, 14 July 2011 (holotype: IBIW! slide no. 18589 = Fig. 178 View FIGURES 167–186 ).

Etymology: —Epithet refers to the smaller size but similarity with G. laticollum .

Observations: —This taxon is easily distinguished from G. laticollum by its smaller size and higher number of striae in 10 μm.

IBIW

I. D. Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences

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