title: KOBAYASIELLA BEBOURENSIS, A NEW FRESHWATER DIATOM SPECIES FROM REUNION ISLAND AND FURTHER OBSERVATIONS ON K. MICROPUNCTATA AND K. JAAGII(1).
abstract: The genus Kobayasiella includes species difficult or even impossible to identify in LM. Only EM allows observation of the ultrastructural features helping in diagnostic species circumscription. Recent surveys of the epilithic diatoms in the running waters of Reunion Island led to the discovery of a new species, K. bebourensis. This species differs from all previously described ones by the uniseriate striae composed of areolae occluded by a cribrum. Besides, two other species, the so rarely recorded K. jaagii (F. Meister) Lange-Bert. and K. micropunctata (H. Germ.) Lange-Bert., were collected in two alpine lakes of the French Pyrenees. K. jaagii lacks an umbilicus in the raphe, which is considered one of the most important diagnostic criterions of the genus. However, this species shows a combination of characteristics including it within the genus Kobayasiella. K. micropunctata is a typical representative of the genus Kobayasiella matching all the ultrastructural features of the genus. K. bebourensis and K. micropunctata have a cingulum composed of at least three connecting bands.
authors.affiliation: Université Paul Sabatier, UPS, INP, Ecolab (Laboratoire d'écologie fonctionnelle et environnement), 118, route de Narbonne, 31062 Toulouse Cedex 09, France CNRS Ecolab, 31062 Toulouse, FranceAsconit Consultants, Site Naturopole-3, Boulevard de Clairfont, 66350 Toulouges, FranceU.R. REQE (Réseaux, Epuration et Qualité)-Groupement Cemagref de Bordeaux 50, Avenue de Verdun, 33612 Cestas cedex, France.
authors.forename: René
authors.initials: R
authors.lastname: Le Cohu
authors.affiliation: Université Paul Sabatier, UPS, INP, Ecolab (Laboratoire d'écologie fonctionnelle et environnement), 118, route de Narbonne, 31062 Toulouse Cedex 09, France CNRS Ecolab, 31062 Toulouse, FranceAsconit Consultants, Site Naturopole-3, Boulevard de Clairfont, 66350 Toulouges, FranceU.R. REQE (Réseaux, Epuration et Qualité)-Groupement Cemagref de Bordeaux 50, Avenue de Verdun, 33612 Cestas cedex, France.
authors.forename: Gilles
authors.initials: G
authors.lastname: Gassiole
authors.affiliation: Université Paul Sabatier, UPS, INP, Ecolab (Laboratoire d'écologie fonctionnelle et environnement), 118, route de Narbonne, 31062 Toulouse Cedex 09, France CNRS Ecolab, 31062 Toulouse, FranceAsconit Consultants, Site Naturopole-3, Boulevard de Clairfont, 66350 Toulouges, FranceU.R. REQE (Réseaux, Epuration et Qualité)-Groupement Cemagref de Bordeaux 50, Avenue de Verdun, 33612 Cestas cedex, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Coste
keywords: French Pyrenees; Kobayasiella; Reunion Island; diatoms; new species; taxonomy