Fragilaria miniscula (Grunow) D.M.Williams & Round, 1987 (new combination reference)
Fragilaria radians (Kützing) D.M.Williams & Round, 1987 (new combination reference)
Neofragilaria D.M. Williams & F.E. Round, 1988 accepted as
Fragilariforma D.M. Williams & F.E. Round, 1988 (original description)
Neofragilaria acidobiontica (Charles) Williams & Round, 1987 accepted as
Fragilaria acidobiontica D.F.Charles, 1986 (new combination reference)
Neofragilaria bicapitata (Mayer) D.N.Williams & Round, 1987 accepted as
Fragilaria bicapitata f. bicapitata Mayer, 1916 (1917) (new combination reference)
Neofragilaria constricta (Ehrenberg) D.M.Williams & Round, 1988 (new combination reference)
Neofragilaria lata (Cleve-Euler) Williams & Round, 1987 (new combination reference)
Neofragilaria strangulata (Zanon) Williams & Round, 1987 accepted as
Synedra strangulata Zanon, 1938 (new combination reference)
Neofragilaria virescens (Ralfs) Williams & Round, 1987 accepted as
Fragilaria virescens f. virescens Ralfs, 1843 (new combination reference)
Pseudostaurosira D.M. Williams & F.E. Round, 1988 (original description)
Pseudostaurosira brevistriata (Grunow) D.M.Williams & Round, 1987 (new combination reference)
Pseudostaurosira pseudoconstruens (Marciniak) D.M.Williams & Round, 1987 accepted as
Fragilaria pseudoconstruens Marciniak, 1982 (new combination reference)
Pseudostaurosira robusta (Fusey) D.M.Williams & Round, 1988 (new combination reference)
Pseudostaurosira zeilleri (Héribaud-Joseph) D.M.Williams & Round, 1988 accepted as
Fragilaria zeilleri f. zeilleri Héribaud, 1903 (new combination reference)
Punctastriata D.M. Williams & F.E. Round, 1988 (original description)
Punctastriata linearis D.M.Williams & Round, 1988 (original description)
Punctastriata ovalis D.M.Williams & Round, 1987 (original description)
Staurosira elliptica (Schumann) Cleve & Möller, 1879 accepted as
Fragilaria elliptica f. elliptica Schumann, 1867 (new combination reference)
Staurosirella D.M. Williams & F.E. Round, 1987 (original description)
Staurosirella africana (Hustedt) D.M.Williams & Round, 1987 accepted as
Fragilaria africana Hustedt, 1949 (new combination reference)
Staurosirella lapponica (Grunow) D.M.Williams & Round, 1987 accepted as
Fragilaria lapponica f. lapponica Grunow in Van Heurck, 1881 (new combination reference)
Staurosirella leptostauron (Ehrenberg) D.M.Williams & Round, 1987 accepted as
Biblarium leptostauron Ehrenberg, 1854 (new combination reference)
Staurosirella pinnata (Ehrenberg) D.M.Williams & Round, 1987 (new combination reference)