Adlafia minuscula (Grunow) Lange-Bertalot, 1999 (new combination reference)
Adlafia minuscula var. muralis (Grunow) Lange-Bertalot, 1999 accepted as Navicula muralis f. muralis Grunow in Van Heurck, 1880 (new combination reference)
Aneumastus apiculatus (Østrup) Lange-Bertalot, 1999 † accepted as Navicula lacustris f. apiculata Østrup, 1910 (new combination reference)
Aneumastus tuscula f. angulatus (Hustedt) Lange-Bertalot, 1999 accepted as Navicula tuscula f. angulata Hustedt, 1942 (new combination reference)
Caloneis arctica (Krasske) Lange-Bertalot & S.I.Genkal, 1999 accepted as Caloneis silicula f. arctica Krasske, 1938 (new combination reference)
Caloneis hendeyi H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot, 1999 (original description)
Chamaepinnularia calida (N.I.Hendey) Lange-Bertalot, 199 accepted as Navicula calida Hendey, 1964 (new combination reference)
Chamaepinnularia circumborealis Lange-Bertalot, 1999 (original description)
Chamaepinnularia krasskei Lange-Bertalot, 1999 (original description)
Chamaepinnularia krookiformis (K.Krammer) Lange-Bertalot & K.Krammer apud H.Lange.Bertalot & S.I.Genkal, 1999 accepted as Pinnularia krookiformis K.Krammer, 1992 (new combination reference)
Chamaepinnularia krookii (Grunow) Lange-Bertalot & K.Krammer, 1999 (new combination reference)
Chamaepinnularia oculus (Østrup) Lange-Bertalot, 1999 accepted as Navicula oculus Østrup, 1897 (new combination reference)
Cymbopleura (K. Krammer) K. Krammer in Lange-Bertalot & Genkal, 1999 (original description)
Cymbopleura fluminea (R.Patrick & L.R.Freese) Lange-Bertalot & K.Krammer, 2003 accepted as Cymbella fluminea R.Patrick & L.R.Freese, 1961 (new combination reference)
Cymbopleura heinii Lange-Bertalot & K.Krammer, 1999 (original description)
Cymbopleura semigibbosa (R. Patrick & L.R. Freese) H. Lange-Bertalot & K. Krammer apud H. Lange-Bertalot & S.I. Genkal, 1999 accepted as Cymbella semigibbosa Patrick & Freese, 1961 (new combination reference)
Diadesmis paracontenta Lange-Bertalot & Werum, 1999 (original description)
Diadesmis pseudocontenta Lange-Bertalot & Werum, 1999 (original description)
Diploneis ovalis H. Lange-Bertalot apud H. Lange-Bertalot & S. I. Genkal in H. Lange-Bertalot (ed.), 1999 (original description)
Encyonema sibericum K.Krammer & Lange-Bertalot apud Lange-Bertalot & S.I.Genkal, 1999 (original description)
Eucocconeis alpestris (Brun) Lange-Bertalot, 1999 (new combination reference)
Eucocconeis aretasii (E. Manguin) H. Lange-Bertalot in H. Lange-Bertalot & S. I. Genkal, 1999 (new combination reference)
Eucocconeis austriaca (Hustedt) H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot (ed.), 1999 accepted as Achnanthes austriaca var. austriaca Hust., 1922 accepted as Achnanthes austriaca Hust., 1922 (new combination reference)
Eucocconeis depressa (Cleve) H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot, 19991 (new combination reference)
Eucocconeis diluviana (Hustedt) H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal in Lange-Bertalot (ed.), 1999 (new combination reference)
Eucocconeis laevis (Østrup) Lange-Bertalot, 1999 (new combination reference)
Eucocconeis leptostriata Lange-Bertalot, 1999 (original description)
Eucocconeis ninckei (P. Guermeur & E. Manguin) H. Lange-Bertalot in H Lange-Bertalot & S.I. Genkal, 1999 (new combination reference)
Eucocconeis quadratarea (Østrup) Lange-Bertalot, 1999 (new combination reference)
Eunotia ursamaioris Lange-Bertalot & Nörpel-Schempp, 1999 (original description)
Fragilaria henryi H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal, 1999 (original description)
Frustulia lange-bertalotii Metzeltin, 1999 (original description)
Gomphonema astridiae H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot (ed.), 1999 (original description)
Gomphonema calcifugum H. Lange-Bertalot & E. Reichardt apud H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot (ed.), 1999 (original description)
Gomphonema distans (A.Cleve-Euler) Lange-Bertalot & E.Reichardt, 1999 (new combination reference)
Gomphonema frigidum H. Lange-Bertalot & E. Reichardt apud H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot (ed.), 1999 (original description)
Gomphonema genkalii H. Lange-Bertalot & E. Reichardt apud H. Lange-Bertalot & S. I. Genkal in H. Lange-Bertalot (ed.), 1999 (original description)
Gomphonema leptoproductum H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot (ed.), 1999 (original description)
Gomphonema makarovae Lange-Bertalot, 1999 (original description)
Gomphonema subarcticum H. Lange-Bertalot & E. Reichardt apud H. Lange-Bertalot & S.I. Genkal, 1999 (original description)
Gomphonema wiltschkorum H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal, 1999 (original description)
Gomphosphenia tenerrima (Hustedt) E. Reichardt, 1999 (new combination reference)
Hantzschia compacta (Hustedt) H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal, 1999 (new combination reference)
Muelleria islandica (Østrup) H. Lange-Bertalot in H. Lange-Bertalot & S. I. Genkal, 1999 (new combination reference)
Navicula chiarae Lange-Bertalot & S.I.Genkal, 1999 (original description)
Navicula digitoconvergens Lange-Bertalot, 1999 (original description)
Navicula kohlmaieri Lange-Bertalot, 1998 (original description)
Navicula luciae A. Witkowski & H. Lange-Bertalot in H. Lange-Bertalot & S. I. Genkal, 1999 (original description)
Navicula phylleptosoma Lange-Bertalot, 1999 (original description)
Navicula vekhovii Lange-Bertalot & Genkal, 1999 (original description)
Naviculadicta parasemen H. Lange-Bertalot in H. Lange-Bertalot & S.I. Genkal, 1999 (original description)
Naviculadicta vekhovii Lange-Bertalot & S.I.Genkal, 1999 (original description)
Neidiopsis levanderi (Hustedt) Lange-Bertalot & Metzeltin, 1999 accepted as Navicula levanderi f. levanderi Hustedt in Schmidt et al., 1934 (new combination reference)
Neidiopsis levanderi var. capitata (Krasske) H. Lange-Bertalot in H. Lange-Bertalot & S.I. Genkal, 1999 accepted as Navicula levanderi var. capitata Krasske, 1938 (new combination reference)
Neidiopsis levanderi var. tatrensis (J.Bílý & P.Marvan) Lange-Bertalot (new combination reference)
Neidiopsis vekhovii (Lange-Bertalot & S.I.Genkal) Lange-Bertalot, 2001 accepted as Neidium vekhovii Lange-Bertalot & S.I.Genkal, 1998 (new combination reference)
Neidiopsis wulffii (Petersen) Lange-Bertalot, 1999 accepted as Navicula wulffii Petersen, 1924 (new combination reference)
Neidium vekhovii Lange-Bertalot & S.I.Genkal, 1998 (original description)
Nitzschia metzeltinii H. Lange-Bertalot in H. Lange-Bertalot & S.I. Genkal, 1999 (original description)
Nitzschia strelnikovae Lange-Bertalot, 2005 (original description)
Nupela imperfecta (H.Schimanski) Lange-Bertalot & Genkal, 1999 (new combination reference)
Opephora krumbeinii A.Witkowski, Witak & K.Stachura apud Lange-Bertalot & S.I.Genkal, 1999 accepted as Nanofrustulum krumbeinii (Witkowski, Witak & Stachura) E.Morales, 2019 (original description)
Pinnularia bullacostae K.Krammer & Lange-Bertalot, 1999 (original description)
Pinnularia copulata K.Krammer & Lange-Bertalot, 1999 † (original description)
Pinnularia curticostata K.Krammer & Lange-Bertalot, 1999 (original description)
Pinnularia humilis K.Krammer & Lange-Bertalot, 1999 (original description)
Pinnularia lunata K.Krammer & Lange-Bertalot, 1999 (original description)
Pinnularia petersenii K.Krammer & Lange-Bertalot, 1999 (original description)
Pinnularia pseudoparva K.Krammer & Lange-Bertalot, 1999 (original description)
Stauroneis circumborealis H. Lange-Bertalot & K. Krammer in H. Lange-Bertalot & S.I. Genkal, 1999 (original description)
Stauroneis heinii H. Lange-Bertalot & K. Krammer in H. Lange-Bertalot & S. I. Genkal, 1999 (original description)
Stauroneis hyperborea H. Lange-Bertalot & K. Krammer in H. Lange-Bertalot & S. I. Genkal , 1999 (original description)
Stauroneis leguminiformis H. Lange-Bertalot & K. Krammer in H. Lange-Bertalot & S. I. Genkal, 1999 (original description)
Stauroneis leguminopsis Lange-Bertalot & K.Krammer, 1999 (original description)
Stauroneis subgracilis Lange-Bertalot & K.Krammer, 1999 (original description)
Stauronella amphoroides (Grunow) H. Lange-Bertalot in H. Lange-Bertalot & S.I. Genkal, 1999 (new combination reference)
Stauronella arctica (Hustedt) H. Lange-Bertalot in H. Lange-Bertalot & S.I. Genkal, 1999 (new combination reference)
Stauronella decipiens (Hustedt) H. Lange-Bertalot in H. Lange-Bertalot & S.I. Genkal, 1999 (new combination reference)
Stauronella indubitabilis H. Lange-Bertalot & S.I. Genkal, 1999 (original description)