Mâle : Corps allongé, peu convexe, densément couvert d'une pubescence brune hérissée, entièrement noir. Les antennes sont très fortement dentées et atteignent à peine les élytres. Le pronotum est transverse, déprimé près des angles postérieurs. Les pattes sont noires. Femelle : larviforme, dépourvue d'élytres, en entier d'un brun roussâtre foncé et couverte d'une dense pubescence brunâtre très épaisse. Antennes épaisses, très courtes.
Identification :
facile.
Confusions possibles :
Le mâle se distingue de celui de D. flavescens par sa taille et sa couleur. La femelle se distingue de celles des Lampyridae « vers luisants » par sa pubescence et l'absence d'organes luminescents et se sépare de celle de D. flavescens par l'aspect de sa pubescence.
Périodes d'observation (adultes) :
avril à juin.
Biologie-éthologie :
La femelle est prédatrice de Gastéropodes et se rencontre très rarement à l'air libre car elle séjourne dans la coquille de ses proies. Le mâle vole le jour à la recherche des femelles et se rencontre sur les feuilles et les herbes.
Biogéographie-écologie :
Zones boisées d'Europe septentrionale et centrale.
Références : Geisthardt M. 1979 : Diversicornia : Drilidae. In Freude H., Harde K.W. & Lohse G.A., Die Käfer Mitteleuropas. Band 6. Krefeld, Goecke & Evers : 52-53.
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
