ALGAE IN PHYTOPLANKTON OF THE UNITED STATES 



Table l.-List of algal genera observed in the phytoplankton of the United 



States - Continued 



CYANOPHYTA (Blue-green algae) 



Agmenellum 



Anabaena 



Anabaenopsis 



Anacystis 



Aphanizomenon 



Arthrospira 



Borzia 



Calothrix 



Coccochloris 



Cylindrospermum 



Dactylococcopsis 



Entophysalis 



Gloeocapsa 



Gloeotrichia 



Gomphosphaeria 



Hydrocoleum 



Isocystis 



Johannesbap tis tia 



Kyrkia 



Lyngbya 



Microcoleus 

 Nodularia 



Nostoc 



Oscillatoria 



Phormidium 



Plectonema 



Porphyrosiphon 



Raphidiopsis 

 Rivularia 



Schizothrix 



Spirulina 



Symploca 



Tetrapedia 

 Trichodesmium 



RHODOPHYTA (Red algae) 



Audouinella Bangia 



Table 2. -Commonly occurring genera of algae observed in the phytoplankton of the 



United States 



Genus 



Nitzschia 



Navicula 



Cyclotella 



Scenedesmus 



Ankistrodesmus 



Melosira 



Synedra 



Gomphonema 



Anacystis 



Oscillatoria 



Achnanthes 



Cymbella 



Chlamydomonas 



Cocconeis 



Diatoma 



Trachelomonas 



Fragilaria 



Surirella 



Euglena 



Kirchneriella 



Asterionella 



Oocystis 



Dictyosphaerium 



Crucigenia 



Cryptomonas 



Anabaena 



Lyngbya 



Rhoicosphenia 



Agmenellum 



Tetraedron 



Number of 

 occurrence 1 



Percent 



