Planothidium robustius Lange-Bert.

Planothidium robustius Lange-Bert.

Planothidium robustius Lange-Bert. in Iconogr. Diatomol. 6: 279. 19991

is replaced synonym for Achnanthes lanceolata var. robusta

is new name for Achnanthes lanceolata var. robusta Hust.

1. (Syn. subst.:) fig. 13: 47-49 non Achnanthes delicata var. robusta Hustedt 1934