1990. Scale-bearing chrysophytes from tropical Northeast India. -Nord. J. Bot. 10: 343-354. Copenhagen. ISSN 0107-055x. This is the first publication describing scale-bearing Chrysophyceae from India by means of electron microscopy. 'henty seven such taxa are described from samples for ponds, rivers and thermal springs. 'henty of these are Mallomonas spp.: M . akrokomos, M. bronchartiana, M . caudata, M . ceylanica, M. costata, M. crassisquama, M. cyathellata var. cyathellata, M. cyathellata var. chilensis, M . cyathellata var. kenyana, M. gunata, M. heterospina, M . mangofera f. mangofera, M . mangofera f. foveata, M . mangoferea f. reticulata, M . matvienkoae f. matvienkoae, M . matvienkoae var. grandis, M. morrisonensis, M . peronoides, M . portae-ferreae, and M . tasmanica. Three are Synura taxa: S. curtispina, S. petersenii f. petersenii, and S. petersenii f. kufferathii. ' h o are Spiniferomonas species: S. coronacircumspina and S.enigmata. Paraphysomonas and Chrysosphaerella were each represented by one species: P. vestita and C. longispina. The water bodies from which these samples were taken were mostly eutrophic and nutrient rich. The majority of the taxa were obtained during the summer months when water temperatures were high. This contradicts the widely held belief that silica-scaled chrysophytes are mainly found in cold oligotrophic and mesotrophic waters. Mallomonas portae-ferreae and one unidentified species of Mallomonas were recorded also from thermal springs having water temperatures up to 50°C.
Examination of Trentepohlia Martius species indicated significant morphological diversity within the genus. This diversity forms the basis for the description of a new genus, Printzina Thompson and Wujek. The generic taxonomy is based on the nature of its superficial growth on leaves or twigs and a papilla pore basal on the sporangium, adjacent to the area of attachment. Certain nomen‐clatural treatments were required: the transfer of nine species from Trentepohlia and the description of one new species, Printzina ampla.
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