Corps cylindrique, trapu, glabre, le pronotum et les élytres vert sombre, bleu ou violacé métallique avec les stries de points vert clair. Les appendices sont rougeâtres, plus ou moins rembrunis. Le pronotum est un peu transverse, nettement plus étroit que les élytres, faiblement étranglé en arrière du milieu, finement chagriné. Les élytres sont fortement et densément ponctués sur fond lisse. Les antennes sont robustes avec le 3e article très allongé et atteignent le milieu des élytres. Les pattes postérieures sont très longues. Les fémurs postérieurs sont claviformes et portent deux petites dents.
Identification
L'espèce est difficile à identifier.
Confusions possibles
L'espèce peut être confondue avec D. versicolorea également dotée de pattes postérieures très longues est plus petite.
Période d'observation
Les adultes s'observent de juin à septembre.
Biologie-éthologie
Espèce phytophage dont les larves se développent dans les feuilles des Nuphar et Nymphaea. Les adultes se trouvent sur les feuilles flottantes des plantes-hôtes.
Biogéographie et écologie
Cette espèce se rencontre sur les étangs et rivières lentes de toute l'Europe.
Sources
Bordy B., Doguet S. & Debreuil M., 2012. Les Donaciinae de France (Coleoptera Chrysomelidae). Rutilans & Magellanes : 92 p.
The map presents a summary at the 10 x 10 km grid of the observation data for the species transmitted to the SINP. These data have been subjected to validation filters.
Distribution map from the Atlas of Departmental Biodiversity and Marine Sectors program
Current distribution in metropolitan France
The map presents a reference distribution layer of the species at the scale of departments and marine sectors. The presence and absence data were established by expertise within a network of partners. This reference distribution is used in the validation process of the SINP data at the INPN level.
Distribution map from the Atlas of Departmental Biodiversity and Marine Sectors program
Certain presence
Corresponds to a report on the basis of at least one observation proved within a period of 10 years (20 years for little-known invertebrates) preceding the year and no presumption of extinction since obtaining the last data nor doubt on reproductive and implemented nature of this population. For migratory species, the presence indicated concerns areas of reproduction.
Probable presence
This status is based on one or more of the following criteria:
search of species incomplete but presence of supportive environments;
ecology of the species consistent with the hypothesis of his presence;
the last reliable sighting is older than 10 years compared to the reference date, no recent specific research and no presumption of extinction from that date [vertebrates, invertebrates and plants well studied (rhopalocera, grasshoppers, dragonflies ...)] ;
the last reliable observation being older than 20 years, no recent specific research and no presumption of extinction from that date [poorly known taxa: fungus, many invertebrates...].
Probable or certain absence
This point covers the absence, more difficult by nature to demonstrate than presence. This status is based on one or more of the following criteria:
intensive but unsuccessful targeted research;
lack of adequate environments;
unobserved species while its presence is easily detected;
unlikely presence for historical or biogeographical reasons.
This status must be assigned to a department in which the presence of the species is casual.
Absence due to a proven extinction
Particular case of absence due to a proven extinction less than a half century ago (older disappearances are treated as "no probable or definite").
No information
In the state of knowledge, we can not comment on the presence or absence in the current department. This is the default status when not comprised in one of the previous categories or whenever there is doubt.
French Version
