Table II. Classification of plankton diatoms proposed by Hendey 

 (i937) with the genera and higher groups seen in the Benguela 

 current material in ordinary type, others in italics. Note: this is not 

 a complete classification, many non-marine or non-planktonic genera 

 having been omitted. Inclusion of all diatom genera would slightly 

 alter the sequence of some of the units of less than sub-ordinal rank. 



Sub- Sub- 



orders Families families Genera 



DISCINEAE 



Coscinodiscaceae 



Melosiroideae 



Melosira 

 Hyalodiscus 



Skeletonemoideae 



Skeletonema 



Stephanopyxis 



Detonula 



Thalassiosiroideae 



Thalassiosira 



Coscinosira 



Lauderia 



Schroderella 



Bacterosira 



Coscinodiscoideae 



Coscinodiscus 

 Charcotia 

 Planktoniella 

 Gossleriella 

 Schimperiella 

 Actinocyclus 

 Hemidiscaceae 



Hemidiscoideae 



Hemidiscus 

 Actinodiscaceae 



Stictodiscoideae 



Stictodiscus 

 Arachnoidiscus 



Actinoptychoideae 



Actinoptychus 



Asterolamproideae 



Asterolampra 

 Asteromphalus 

 AULACODISCINEAE 

 Eupodiscaceae 



Pyrgodiscoideae 



Pyrgodiscus 



Aulacodiscoideae 



Aulacodiscus 



Eupodiscoideae 



Eupodiscus 

 AULISCINEAE 



Auliscaceae 



Auliscoideae 



Auliscus 

 BIDDULPHIINEAE 



Biddulphiaceae 



Biddulphioideae 



Biddulphia 

 Bellerochea 

 Cerataulus 

 Cerataulina 



Triceratioideae 



Triceratium 



Trigonium 



Pseudotriceratium 



Lithodesmium 



Ditylum 



Hemiauloideae 



Hemiaulus 



Eucamphioideae 



Eucampia 

 Streptotheca 

 Climacodium 

 Anaulaceae 



Anauloideae 



Anaulus 

 Chaetoceraceae 



Chaetoceroideae 



Chaetoceros 



The first four of the five arbitrary groupings used for descriptive 

 summaries in this report coincide with suborders or families in the 

 system, and are shoivn beloio in heavy type. The fifth group, a 

 heterogeneous lumping from the last five suborders, has been termed 

 ' pennatae' for the sake of brevity, but is not intended to imply 

 reversion to earlier classification (see text) 



Sub- Sub- 



orders Families families Genera 



SOLENIINEAE 



Bacteriastraceae 



Bacteriastroideae 



Bacteriastrum 

 Rhizosoleniaceae 



Rhizosolenioideae 



Rhizosolenia 

 Guinardia 

 Leptocylindraceae 



Leptocylindroideae 



Dactyliosolen 

 Leptocylindrus 

 Corethronaceae 



Corethronoideae 



Corethron 

 Araphidineae 



Fragilariaceae 



Fragilarioideae 



Fragilaria 

 Fragilariopsis 

 Asterionella 

 Synedra 

 Thalassionema 

 Thalassiothrix 

 Meridionoidcae 



Meridian 

 Tabellarioideae 



Licmophora 

 Grammatophora 

 Striatella 

 Rhabdonema 

 Entopyla 

 RAPHIDIOIDINEAE 

 Eunotiaceae 



Eunotia 

 MONORAPHIDINEAE 



Achnanthaceae 



Achnanthoideae 



Achnanthes 

 Cocconeioideae 



Cocconeis 



BlRAPHIDINEAE 



Naviculaceae 



Naviculoideae 



Navicula 

 Trachyneis 

 Scoresbya 

 Pleurosigma 

 Amphiproroideae 



Amphiprora 

 Tropidoneis 

 Gomphonemaceae 



Gomphonemoideae 



Gomphonema 

 Cymbellaceae 



Cymbelloideae 



Cymbella 

 Amphora 

 Epithemiaceae 



Epithemioideae 



Epithemia 

 Bacillariaceae 



Nitzschioideae 



Nitzschia 

 Chumella 

 Bacillarioideae 



Bacillaria 

 SURIRELLINEAE 



Surirellaceae 



Surirelloideae 



Surirella 

 Campylodiscoideae 



Campylodiscus 



