Attached Diatom from the Negoro River, Amazonas, Brazil
1988 Volume 4 Pages 11-16
Details
1988 Volume 4 Pages 11-16
Samples of attached diatoms were taken from the flat upper surfaces of submerged stones in the Rio Negro, a tributary of the Amazon River, at Ponta da Praia (Km 18), opposite the Tropical Hotel, Manaus, Amazonas, Brazil, on August 8,1986.
The samples were examined with a light microscope and each taxon was photographed, illustrated and measured for identification.19 taxa from 12 genera are recorded, distributed as follows; one species of genus Actinella (A. brasiliensis GRUN. ), one species of genus Anomoeoneis (A. exilis (KÜTZ. ) Cleve f. lanceolata A. MAYER, ) two species of genus Cymbella (C. amphicephala NAEG. and C. ventricosa KÜTZ. ), five taxa of genus Eunotia (E. diodon EHR., E. lunaris (EHR. ) GRUN., E. valida HUST,. E. fallax A. CLEVE var. gracilima KRASSKE and E. pectinalis (Dillw. ? KÜTZ. ) Rabenh. var. minor (KÜTZ. ) RABENH.), one species of Cyclotella (Cyclotella sp. ), one species of Fragilaria (F. constricta EHR. ), two taxa of Frustulia(F. rhomboides (RABENH). DE TONI f. saxonica and f. undulata HUST. ), (RABENH), one species of Gomphonema (G. subclavatum EHR. ?), two species of Pinnularia (P. subcapitata GREG. and P. hemiptera RABENH. ), one species of Navicula (N. cryptotenella LANGE-BERTAL ? ), one species of Nitzschia (N. palea (KÜTZ. ) W. SMITH), and one species of Synedra (S. rumpens KÜTZ. var. scotica GRUNT. ?). Eunotia was the best represented genus in number of taxa identified, while Actinella, Cyclotella, Synedra, Fragillaria, Nitzschia, Anomoeoneis and Gomphonema were the least represented of all.
