Brachysira, Kutzing, 1836

Kennedy, Bryan & Allott, Norman, 2017, A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies, Phytotaxa 326 (1), pp. 1-27 : 12

Other Brachysira Taxa

Rarely occurring species

B. serians and B. zellensis ( Figs 42–43 ) were encountered only as isolated valves in two and three lake samples respectively, in the west of the country. B. styriaca ( Figs 34–41 ) and B. liliana ( Figs 44–51 ) were also uncommon, reaching a slightly higher maximum abundance (1.2% & 1.4%), but also occur infrequently in western lakes. B. liliana was restricted to calcareous lakes and often found in association with B. neglectissima (see below). The morphology and ecology of the small number of valves encountered for these less common taxa conform to that given for the type description and in published accounts elsewhere.

Figures

FIGURES 34–43. Brachysira styriaca and Brachysira zellensis. Figs 34–40. B. styriaca, LM. Fig. 41. B. styriaca, SEM. Fig. 42. B. zellensis, LM. Fig. 43. B. zellensis, SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.

FIGURES 44–51. Brachysira liliana. Figs 44–47. LM. Figs 48–51. SEM. Scale bar = 10 μm for all LM figures. Scale bar in all SEM micrographs = 2 μm.