INVESTIGADORES
MATALONI Maria Gabriela
congresos y reuniones científicas
Título:
Observations of small-celled species from the Hippodonta pseudoacceptata group
Autor/es:
BLANCO. S.; VAN DE VIJVER, B.; VINOCUR, A.; MATALONI, G.; GOMÁ, J.; NOVAIS, M.H.; ECTOR, L.
Lugar:
Szczecin
Reunión:
Congreso; 5th Central European Diatom Meeting; 2011
Institución organizadora:
Uniwersytetu Szczecinskiego
Resumen:
Within the c. 30 species currently ascribed to Hippodonta, several small-celled forms morphologically around Hippodonta pseudoacceptata (H. Kobayasi)
Lange-Bert. constitute a rather homogeneous group characterized by rhombic to
linear-rhombic outlines, relatively dense striations and comparatively short
lineolae, and two shorter striae opposed in the central area. In this study, the morphological variability of H. pseudoacceptata is examined analyzing
the valvar ultrastructure of different populations collected from Western Europe or published in the literature. The
morphometric values provided in its protologue do not fit with the original
illustrations of this taxon, therefore an emended diagnosis becomes necessary. H. pumila Lange-Bert., G. Hofmann &
Metzeltin can be considered its taxonomic synonym. Additionally, H. lange-bertalotii Van de Vijver, Mataloni
& Vinocur sp. nov. is described from Crater Lake, DeceptionIsland (South
Shetland Islands). Blanco et al. (2011)
report a detailed morphological description of this species by means of both
light and scanning electron microscopy and a comparison with related taxa. The
main diagnostic criteria include the rhombic outline of the valves, the
comparatively narrow striae and the presence of two shortened striae delimiting
the central area. The adscription of this new species to the genus Hippodonta and the differences with
related taxa are briefly discussed.
Blanco, S., B. Van de Vijver, A. Vinocur, G. Mataloni, J. Gomà, M.H.
Novais & L. Ector (2011). Hippodonta
lange-bertalotii Van de Vijver, Mataloni & Vinocur sp. nov. and related
small-celled Hippodonta taxa. Nova
Hedwigia Beih. In press.