The species check-lists are important to know the local biodiversity. If they are harmful and/or exotic they can cause environmental damages. The portuary regions' aquatic biota survey is valuable to inform which are the high risk species in the water (exotic or harmful species). The species can be caught when the ships are anchored in Parana harbors during the ballast taken. After that, these species can be transferred to the next harbor where it will be discharged, so it starts the biological invasion. In this article the marine and estuarine diatoms of Parana have been listed based on some issues that have been published since 1918 and over the results of ALARME Project (Ballast Water: Risk analysis, Environmental Management Plan and Monitoring of Exotic Species in Paranagua Harbor, Parana) in the Estuarine Paranagua Complex. An amount of 789 specific taxa was recorded and distributed in 167 genera on Parana shore. Among the 789 a number of 575 specific taxa is distributed in 152 genera which were recorded in the Estuarine Paranagua Complex. Some of these species are considered potentially harmful for their toxins production i. e. Amphora coffaeformis and Pseudo-nitzschia spp. The other ones have harmful effects because of anoxia due to the excess of biomass decomposed by bacteriae during the blooming periods. Furthermore it can happens excessive oxygen consumption by algae during breathing. These species are Asterionellopsis glaciallis, Cerataulina pelagica, Coscinodiscus spp, Cylindrotheca closterium, Leptocylindrus spp and Skeletonema costatum. Furthermore, Chaetoceros spp, have setae that damage the fishes' gills causing mass mortalities in some regions. Some species found in samples of the ALARME project are new records for the Parana coast such as Bellerochea horologicales, Biremis circumtexta, Gyrosigma macrum, Licmophora remulus, Nitzschia behrei, Pseudonitzschia calliantha, P. multisseries and Thalassiosira subtilis var. máxima.

RESUMOEstudos florísticos e taxonômicos envolvendo diatomáceas são escassos para a região amazônica. As publicações existentes incluem registros de diatomáceas da Amazônia brasileira, do Equador, da Colômbia e do Peru e comumente mostram que Eunotia e Actinella (Eunotiaceae) são gêneros bem representados nessa região. A maioria dos igarapés amazônicos costuma apresentar potencial hidrogeniônico (pH) ácido, característica aquática que promove o desenvolvimento de uma comunidade típica de diatomáceas, dominada por espécimes de Eunotiaceae. O objetivo deste trabalho foi providenciar um levantamento florístico das espécies de Eunotiaceae presentes em igarapés da Amazônia Central brasileira e registrar os morfotipos de algumas espécies. Amostras fitoplanctônicas e perifíticas foram coletadas em cinco igarapés na rodovia BR-174, em Manaus e Presidente Figueiredo, em setembro e outubro de 1996 e fevereiro e março de 1997. Lâminas permanentes foram preparadas de acordo com a técnica de oxidação lenta para o estudo qualitativo. Vinte e três espécies pertencentes ao gênero Eunotia e seis ao gênero Actinella foram determinadas. Chaves dicotômicas de identificação, descrição detalhada, comentários relevantes e ilustrações foram providenciadas para cada táxon determinado. Morfotipos foram documentados para Eunotia zygodon. Espécies raramente citadas na literatura foram registradas, tais como, Eunotia falcifera e Eunotia rostellata. PALAVRAS-CHAVEEunotia, Actinella, diatomáceas, região amazônica, algas. Eunotiaceae (Bacillariophyceae) from central Amazon rivers, Manaus and Presidente Figueiredo districts, Brasil ABSTRACT Floristic and taxonomical studies about diatoms to Amazonian region are commonly well represented by Eunotia and Actinella (Eunotiaceae

No abstract

The genus Fallacia Stickle & Mann includes naviculoid birraphid diatoms with H-like plastids, valves with uniseriate striae and covered by porous conopea, rounded areolae occluded by hymens, and depressed hyaline lyriform area characterizing the valvar surface. The species Fallacia marnieri was found in samples collected in King George Island, Antarctic Peninsula, on which an electron microscopy study and literature revision were carried out. From this investigation, we found that since Fallacia marnieri has the diagnostic structures of the genus, its recent inclusion in Fallacia is justified. The species was found on rocks of an intertidal region, and seems to be endemic in cold regions, as indicated in the literature.

No abstract