Achnanthes parvula Kützing, 1844 (original description)
Achnanthidium F.T. Kützing, 1844 (original description)
Achnanthidium delicatulum f. delicatulum Kützing, 1844 (original description)
Achnanthidium microcephalum Kützing, 1844 (original description)
Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837 (new combination reference)
Amphipleura F.T. Kützing, 1844 (original description)
Amphora C.G. Ehrenberg ex F.T. Kützing, 1844 (original description)
Amphora acutiuscula var. acutiuscula Kützing, 1844 (original description)
Amphora atomus Kützing, 1844 (original description)
Amphora borealis Kützing, 1844 (original description)
Amphora coffeaeformis (C.Agardh) Kützing, 1844 accepted as Halamphora coffeiformis (C.Agardh) Levkov, 2009 (new combination reference)
Amphora elliptica (Agardh) Kützing, 1844 accepted as Frustulia elliptica C.Agardh, 1824 (new combination reference)
Amphora veneta f. veneta Kützing, 1844 (original description)
Campylodiscus C.G. Ehrenberg ex F.T. Kützing, 1844 (original description)
Coscinodiscus striatus Kützing, 1844 (original description)
Cyclotella minutula Kützing, 1844 † (original description)
Cyclotella rotula Kützing, 1844 accepted as Discoplea rotula Ehrenberg, 1844 (original description)
Cyclotella scotica Kützing, 1844 (original description)
Cymbella cuspidata Kützing, 1844 † (original description)
Cymbella ehrenbergii Kützing, 1844 † (original description)
Cymbella flexella Kützing, 1844 (original description)
Cymbella gastroides (Kützing) Kützing, 1844 accepted as Frustulia gastroides Kützing, 1833 (new combination reference)
Cymbella gracilis (Ehrenberg) Kützing, 1844 accepted as Cocconema gracile Ehrenberg, 1841 (new combination reference)
Cymbella helvetica Kützing, 1844 (original description)
Cymbella leptoceros (Ehrenberg) Kützing, 1844 accepted as Cocconema leptoceros Ehrenberg, 1843 (new combination reference)
Cymbella obtusiuscula Kützing, 1844 (original description)
Cymbella pediculus Kützing, 1844 (original description)
Cymbella ventricosa Kützing, 1844 (original description)
Denticula F.T. Kützing, 1844 (original description)
Diatoma ehrenbergii Kützing, 1844 (original description)
Diatoma hyalinum Kützing, 1844 (original description)
Diatoma mesodon (Ehrenberg) Kützing, 1844 (original description)
Diploneis elliptica (Kützing) Cleve, 1894 (original description)
Encyonema prostratum (Berkeley) Kützing, 1844 accepted as Monema prostratum Berkeley, 1832 (new combination reference)
Epithemia F.T. Kützing, 1844 (original description)
Epithemia argus (Ehrenberg) Kützing, 1844 accepted as Eunotia argus Ehrenberg, 1843 (new combination reference)
Epithemia gibba (Ehrenberg) Kützing, 1844 accepted as Navicula gibba Ehrenberg, 1830 (new combination reference)
Epithemia gibberula (Ehrenberg) Kützing, 1844 accepted as Eunotia gibberula Ehrenberg, 1843 (new combination reference)
Epithemia granulata (Ehrenberg) Kützing, 1844 accepted as Eunotia granulata Ehrenberg, 1836 (new combination reference)
Epithemia musculus Kützing, 1844 (original description)
Epithemia porcellus Kützing, 1844 (original description)
Epithemia saxonica Kützing, 1844 (original description)
Epithemia sorex Kützing, 1844 (original description)
Epithemia turgida (Ehrenberg) Kützing, 1844 accepted as Navicula turgida Ehrenberg, 1830 (new combination reference)
Epithemia ventricosa Kützing, 1844 (original description)
Epithemia westermannii (Ehrenberg) Kützing, 1844 accepted as Navicula westermannii Ehrenberg, 1835 (new combination reference)
Epithemia zebra (Ehrenberg) Kützing, 1844 accepted as Navicula zebra Ehrenberg, 1833 (new combination reference)
Exilaria pulchella Ralfs ex Kützing, 1844 (original description)
Gomphonema constrictum Ehrenberg ex Kützing, 1844 (original description)
Gomphonema curvatum var. marinum Kützing, 1844 (original description)
Gomphonema olivaceum (Hornemann) Kützing, 1844 (new combination reference)
Himantidium minus Kützing, 1844 (original description)
Himantidium veneris Kützing, 1844 (original description)
Melosira dubia Kützing, 1844 (original description)
Navicula costata var. costata Kützing, 1844 (original description)
Navicula cryptocephala Kützing, 1844 (original description)
Navicula didyma Ehrenberg, 1840 accepted as Pinnularia didyma Ehrenberg, 1844 (new combination reference)
Navicula elliptica f. elliptica Kützing, 1844 (original description)
Navicula exilis Kützing, 1844 (original description)
Navicula hemiptera var. hemiptera Kützing, 1844 accepted as Pinnularia hemiptera (Kützing) Rabenhorst, 1853 (original description)
Navicula interrupta var. interrupta Kützing, 1844 (original description)
Navicula kefvingensis (Ehrenberg) Kützing, 1844 (new combination reference)
Navicula laevissima f. laevissima Kützing, 1844 (original description)
Navicula limosa f. limosa Kützing, 1844 (original description)
Navicula mutica f. mutica Kützing, 1844 (original description)
Navicula phyllepta Kützing, 1844 (original description)
Navicula rostellata f. rostellata Kützing, 1844 (original description)
Navicula viridula (Kützing) Ehrenberg, 1836 (new combination reference)
Odontella obtusa Kützing, 1844 (original description)
Odontella turgida (Ehrenberg) Kützing, 1844 accepted as Denticella turgida Ehrenberg, 1840 (new combination reference)
Odontidium F.T. Kützing, 1844 (original description)
Podosphenia debilis Kützing, 1844 (original description)
Podosphenia lyngbyei Kützing, 1844 (original description)
Rhabdonema F.T. Kützing, 1844 (original description)
Rhipidophora F.T. Kützing, 1844 (original description)
Rhipidophora anglica Kützing, 1844 (original description)
Rhipidophora oedipus Kützing, 1844 (original description)
Sphenella F.T. Kützing, 1844 (original description)
Sphenella angustata Kützing, 1844 (original description)
Sphenella parvula Kützing, 1844 accepted as Gomphonema parvulum (Kützing) Kützing, 1849 (original description)
Synedra acicularis Kützing, 1844 (original description)
Synedra acula Kützing, 1844 (original description)
Synedra acus f. acus Kützing, 1844 (original description)
Synedra amphicephala var. amphicephala Kützing, 1844 (original description)
Synedra biceps f. biceps Kützing, 1844 (original description)
Synedra constricta Kützing, 1844 (original description)
Synedra curvula Kützing, 1844 (original description)
Synedra danica Kützing, 1844 (original description)
Synedra debilis Kützing, 1844 (original description)
Synedra dissipata var. dissipata Kützing, 1844 (original description)
Synedra familiaris f. familiaris Kützing, 1844 (original description)
Synedra frustulum Kützing, 1844 (original description)
Synedra pusilla Kützing, 1844 (original description)
Synedra radians var. radians Kützing, 1844 (original description)
Synedra rumpens var. rumpens Kützing, 1844 (original description)
Synedra sigma Kützing, 1844 (original description)
Tabellaria C.G. Ehrenberg ex F.T. Kützing, 1844 (original description)
Tabularia (F.T. Kutzing) D.M. Williams & F.E. Round, 1986 (original description)
Ulnaria (Kützing) P. Compère, 2001 (original description)