Revista Chilena de Historia Natural 80 (1): 63-79, 2007
RESEARCH ARTICLE
Marine diatoms from Buenos Aires coastal waters (Argentina). II. Thalassionemataceae
and Rhaphoneidaceae
This study describes the diversity of the species belonging to the diatom families
Thalassionemataceae Round and Rhaphoneidaceae Forti frequently found in the temperate marine
coastal waters of Buenos Aires Province, Argentina, from October 1994 to September 2000. It comprises morphological, taxonomic
and distributional analysis of species found in planktonic samples collected at San Clemente del Tuyú, Santa Teresita, La Lucila del
Mar, Mar de Ajó, Nueva Atlantis, Pinamar and Villa Gesell. Raw and cleaned samples were analysed with light and scanning electron
microscopy. Four taxa of the genus Thalassionema Grunow ex Mereschkowsky amend. Hallegraeff, one of the genus
Lioloma Hasle, two of the genus Delphineis Andrews and one of the genus Rhaphoneis
Ehrenberg, were identified. Thalassionema pseudonitzschioides (Schuette & Schrader) Hasle,
Thalassionema synedriforme (Greville) Hasle and Lioloma pacificum (Cupp) Hasle in Hasle & Syvertsen
are new records for Argentina.
Key words:
diatoms,
Thalassionemataceae, Thalassionema, Lioloma, Rhaphoneidaceae,
Delphineis, Rhaphoneis
