Diatoms of North AmericaDiatoms of North America
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Compare Psammothidium bioretii

(Germain) Bukht. and Round 1996

Compare

Psammothidium bioretii differs from P. helveticum by its elliptical shape and smaller central areas. It differs from both P. helveticum and P. daonense by the non-parallel axial areas on both valves. P. daonense also has a large rhomboid axial area on the rapheless valve.

LM scalebar = 10 µm
Psammothidium bioretii LM3 Psammothidium bioretii LM2 Psammothidium bioretii LM1 Mo000019 1A Ed 3 Mo000019 1B Ed Gs028733 Psbio 1A Ed Gs028733 Psbio 1B
Length Range
12-26 µm
Width Range
5.3-9.1 µm
Striae in 10 µm
23-27

Psammothidium helveticum

(Hust.) Bukht. and Round 2007

Gs100739 Pshelv 2A Ed Gs100739 Pshelv 2B Ed Gsl00810 13A Ed Gsl00810 6A Ed Gsn23403 1A Gsn23403 1B Gs100739 Pshelv 3B Ed
Length Range
12-26 µm
Width Range
5.1-7.8 µm
Striae in 10 µm
24-30

Psammothidium daonense

(Lange-Bert.) Lange-Bert. 1999

Psammothidium daonense LM3 Psammothidium daonense LM2 Psammothidium daonense LM1 Gs100739 Psdao 4A Ed Gs100739 Psdao 4B Ed Mo000019 1A Ed Gs007601 Psdao 1A Ed
Length Range
9-23 µm
Width Range
4.8-7.5 µm
Striae in 10 µm
24-30