Compare

Planothidium frequentissimum has a narrower, more linear valve and narrow axial area on the rapheless valve.

LM scalebar = 10 µm
Gc8526  Acomissa Circle4 Cl Gc8526  Acomissa Circle1B Cl Planothidium joursacense LM4 Planothidium joursacense LM2 Planothidium joursacense LM1 Planothidium joursacense LM5 Planothidium joursacense LM3
Length Range
9.6-15.6 µm
Width Range
5.5-7.3 µm
Striae in 10 µm
17-19

Planothidium frequentissimum

(Lange-Bert. in Krammer and Lange-Bert.) Lange-Bert. 1999

Gs119780 1 Ed Planothidium frequentissimum LM3 Planothidium frequentissimum LM2 Mo000019 1A Ed 5 Planothidium frequentissimum LM1 Gs181995 1B Ed Mo000019  Plfreq 1B Ed
Length Range
5-17 µm
Width Range
3-6 µm
Striae in 10 µm
13-18

Diatoms of North America relies on the financial support of our user community. We aim to build our technical content by engaging diatomists at all levels and training the next generation. We need you to reach our 2025 fundraising goal of $25,000.

If you use and appreciate DONA, make your DONAtion today.