Achnanthes brevipes var. capensis (Kützing) Grunow, 1867 accepted as Achnanthes capensis var. capensis Kützing, 1844 (new combination reference)
Achnanthes inflata var. inflata (Kützing) Grunow, 1868 accepted as Stauroneis inflata var. inflata Kützing, 1844 (new combination reference)
Actinocyclus ovalis Grunow accepted as Eupodiscus ovalis G.Norman, 1861 (new combination reference)
Actinoptychus ehrenbergii Grunow, 1867 (original description)
Actinoptychus halionyx var. halionyx Grunow, 1867 (original description)
Actinoptychus halionyx var. radiata Grunow, 1867 (original description)
Actinoptychus omphalopelta Grunow, 1867 (original description)
Actinoptychus undulatus var. denarius (Ehrenberg) Grunow, 1867 accepted as Actinoptychus denarius Ehrenberg, 1843 (new combination reference)
Actinoptychus undulatus var. duodenarius (Ehrenberg) Grunow, 1867 accepted as Actinocyclus duodenarius (Ehrenberg) W. Smith, 1856 (new combination reference)
Actinoptychus undulatus var. octonarius (Ehrenberg) Grunow, 1867 accepted as Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837 (new combination reference)
Actinoptychus undulatus var. senarius (Ehrenberg) Grunow, 1867 accepted as Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 accepted as Actinocyclus senarius Ehrenberg, 1838 (new combination reference)
Amphora binodis f. minutissima Grunow, 1867 (original description)
Amphora kamorthensis f. kamorthensis Grunow, 1867 (original description)
Anorthoneis A. Grunow, 1868 (original description)
Anorthoneis excentrica (Donkin) Grunow, 1870 (new combination reference)
Asterolampra dallasiana f. 12-radiata Grunow, 1867 (original description)
Asterolampra dubia f. 5-radiata Grunow, 1867 (original description)
Asteromphalus nankoorensis var. nankoorensis Grunow, 1867 (original description)
Aulacodiscus orientalis var. nankoorensis Grunow, 1867 (original description)
Bacillaria obtusa (W.Smith) Elmore, 1895 accepted as Nitzschia obtusa f. obtusa W. Smith, 1853 (new combination reference)
Berkeleya dillwynii (C.Agardh) Grunow, 1880 accepted as Schizonema dillwynii var. dillwynii Agardh, 1824 (new combination reference)
Berkeleya harveyana Grunow, 1868 (original description)
Biddulphia obtusa (Kützing) Ralfs, 1861 accepted as Odontella obtusa Kützing, 1844 (new combination reference)
Campyloneis argus var. reticulata Grunow, 1867 (original description)
Campyloneis coelata (Greville) Gregory in Grunow, 1868 accepted as Cocconeis coelata Arnott ex Greville, 1862 (new combination reference)
Campyloneis grevillei (W.Smith) Grunow & Eulenstein, 1868 accepted as Cocconeis regalis Greville, 1859 (new combination reference)
Campyloneis grevillei Grunow, 1868 (original description)
Campyloneis grevillei var. grevillei (W. Smith) Grunow, 1867 (1870) accepted as Cocconeis grevillei W.Smith, 1853 (new combination reference)
Campyloneis grevillei var. obliqua Grunow, 1867 (original description)
Campyloneis regalis var. obliqua Grunow, 1867 (original description)
Campyloneis regalis var. regalis (Greville) Grunow, 1867 accepted as Cocconeis regalis Greville, 1859 (new combination reference)
Climacodium A. Grunow, 1868 (original description)
Climacodium frauenfeldianum var. frauenfeldianum Grunow, 1868 (original description)
Cocconeis ambigua var. ambigua Grunow, 1867 (original description)
Cocconeis binotata var. atlantica Grunow, 1867 (original description)
Cocconeis dirupta var. dubia Grunow, 1867 (original description)
Cocconeis dirupta var. genuina Grunow, 1867 (original description)
Cocconeis dirupta var. major Grunow, 1868 (original description)
Cocconeis exarata Grunow, 1868 (original description)
Cocconeis pacifica Grunow, 1867 (original description)
Cocconeis pediculus var. genuina Grunow, 1868 (original description)
Cocconeis pediculus var. placentula (Ehrenberg) Grunow, 1867 accepted as Cocconeis placentula f. placentula Ehrenberg, 1838 (new combination reference)
Cocconeis pellucida var. minor Grunow, 1868 (original description)
Cocconeis pellucida var. nankoorensis Grunow, 1868 (original description)
Cocconeis pellucida var. sigmoidea Grunow, 1868 (original description)
Cocconeis pseudomarginata var. intermedia Grunow, 1868 (original description)
Cocconeis scutellum var. distans (Gregory) Grunow, 1867 accepted as Cocconeis distans W.Gregory, 1855 (new combination reference)
Cocconeis scutellum var. major Grunow, 1868 (original description)
Cocconeis scutellum var. minuta Grunow, 1868 (original description)
Cocconeis scutellum var. ornata Grunow, 1870 (original description)
Cocconeis surirelloides Grunow, 1868 (original description)
Coscinodiscus ellipticus Grunow, 1867 (1870) (original description)
Coscinodiscus odontodiscus var. odontodiscus Grunow, 1884 (original description)
Craticula A. Grunow, 1867 (original description)
Craticula ehrenbergii Grunow, 1867 (original description)
Craticula megaloptera (Ehrenberg) Grunow, 1867 accepted as Surirella megaloptera Ehrenberg, 1854 (new combination reference)
Craticula perrotettii Grunow, 1868 '1867' (original description)
Craticula procera (Ehrenberg) Grunow, 1867 accepted as Surirella procera Ehrenberg, 1854 (new combination reference)
Denticula nicobarica Grunow, 1868 (original description)
Entopyla ornata Grunow, 1868 (original description)
Eunotia monodon var. diodon (Ehrenberg) Grunow, 1867 (new combination reference)
Eunotia papilio (Ehrenberg) Grunow, 1868 accepted as Himantidium papilo Ehrenberg, 1843 (new combination reference)
Eupodiscus interpunctatus (Brightwell) Grunow, 1868 accepted as Actinoptychus interpunctatus Brightwell, 1860 (new combination reference)
Fragilaria nankoorensis Grunow, 1868 (original description)
Fragilaria schwartziana Grunow, 1868 (original description)
Gomphonema micropus var. tenellum (Kützing) Grunow, 1868 accepted as Gomphonema tenellum var. tenellum Kützing, 1844 (new combination reference)
Gomphonema tenellum var. anguste Grunow, 1867 (original description)
Gomphonema tenellum var. lanceolatis Grunow, 1867 (original description)
Gomphonema tenellum var. valvis Grunow, 1867 (original description)
Gomphonitzschia A. Grunow, 1868 (original description)
Gomphonitzschia ungeriana Grunow, 1868 (original description)
Grammatophora oceanica var. intermedia Grunow, 1867 (original description)
Licmophora baileyi (Edwards in Lewis) Grunow, 1867 accepted as Podosphenia baileyi Edwards in Lewis, 1862 (new combination reference)
Licmophora capensis (Grunow) Grunow, 1867 accepted as Podosphenia capensis f. capensis Grunow, 1862 (new combination reference)
Licmophora dalmatica f. dalmatica (Kützing) Grunow, 1867 accepted as Rhipidophora dalmatica var. dalmatica Kützing, 1844 (new combination reference)
Licmophora ehrenbergii f. angustata (Grunow) Grunow, 1867 accepted as Podosphenia angustata Grunow, 1862 (new combination reference)
Licmophora ehrenbergii f. ehrenbergii (Kützing) Grunow, 1867 accepted as Podosphenia ehrenbergii f. ehrenbergii Kützing, 1844 (new combination reference)
Licmophora ehrenbergii f. major Grunow, 1867 (original description)
Licmophora fibula (Brébisson) Grunow, 1867 accepted as Gomphonema fibula Brébisson ex Kützing, 1849 (new combination reference)
Licmophora gracilis f. elongata (Kützing) Hustedt (new combination reference)
Licmophora gracilis f. gracilis (Ehrenberg) Grunow, 1867 accepted as Podosphenia gracilis var. gracilis Ehrenberg, 1838 (new combination reference)
Licmophora gracilis f. grandis (Kützing) Grunow, 1867 accepted as Rhipidophora grandis var. grandis Kützing, 1844 (new combination reference)
Licmophora hyalina (Kützing) Grunow, 1867 accepted as Podosphenia hyalina var. hyalina Kützing, 1844 (new combination reference)
Licmophora lyngbyei f. lyngbyei (Kützing) Grunow, 1867 accepted as Podosphenia lyngbyei Kützing, 1844 (new combination reference)
Licmophora lyngbyei f. pappeana (Grunow) Grunow, 1867 accepted as Podosphenia pappeana Grunow, 1863 (new combination reference)
Licmophora ovata f. ovata (W. Smith) Grunow, 1867 accepted as Podosphenia ovata W.Smith, 1853 (new combination reference)
Licmophora pappeana (Grunow) Grunow, 1867 accepted as Podosphenia pappeana Grunow, 1863 (new combination reference)
Licmophora remulus Grunow, 1867 (original description)
Licmophora tenuis (Kützing) Grunow, 1867 (new combination reference)
Licmophora tincta f. debilis (Kützing) Grunow, 1867 accepted as Podosphenia debilis Kützing, 1844 (new combination reference)
Licmophora tincta f. nubecula (Kützing) Grunow, 1867 accepted as Rhipidophora nubecula Kützing, 1844 (new combination reference)
Licmophora tincta f. tenella (Kützing) Grunow, 1867 accepted as Rhipidophora tenella Kützing, 1844 (new combination reference)
Licmophora tincta f. tincta (Agardh) Grunow, 1867 accepted as Gomphonema tinctum C.Agardh, 1831 (new combination reference)
Mastogloia binotata var. atlantica Grunow, 1867 (original description)
Mastogloia jelinekiana Grunow, 1867 (original description)
Mastogloia marginulata Grunow, 1867 (original description)
Melosira radiata var. radiata (Brightwell) Grunow, 1867 accepted as Cyclotella radiata Brightwell, 1860 (new combination reference)
Navicula fortis var. opima Grunow, 1868 (original description)
Navicula gemmata var. biseriata Grunow, 1867 (original description)
Navicula hochstetteriana Grunow, 1867 (original description)