Compare

Psammothidium daonense differs from P. helveticum and P. chlidanos by the large rhomboid axial area on the rapheless valve. Psammothidium daonense has wider and more elliptical valves than P. marginulatum and P. scoticum.

LM scalebar = 10 µm
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

Psammothidium acidoclinatum

(Lange-Bert.) Lange-Bert. 1996

Psammothidium acidoclinatum LM5 Psammothidium acidoclinatum LM4 Psammothidium acidoclinatum LM3 Psammothidium acidoclinatum LM2 Psammothidium acidoclinatum LM1
Length Range
8-16 µm
Width Range
4.4-5.8 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 chlidanos

(M.H.Hohn and Hellerman) Lange-Bert. 1999

Psammothidium chlidanos LM3 Psammothidium chlidanos LM1 Gsn23387  Pschlidanos 2A Ed Gsn23387  Pschlidanos 2B Ed Gc44453  Acchlidanos Type3 Ed 1 Gc44453  Acchlidanos Type6 Ed Gs100739  Pschlidanos 1A Ed
Length Range
12-18 µm
Width Range
4.8-6.2 µm
Striae in 10 µm
27-33