Planothidium miotum (J.R.Carter) Lange-Bert. Planothidium miotum (J.R.Carter) Lange-Bert. in Iconogr. Diatomol. 6: 278. 19991is new combination for Achnanthes miota J.R.Carter21. (Basionym:) fig. 1: 9, 2. Author abbreviation not checked.