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Capricorne d’aspect court et robuste, au corps noir ovale et convexe, entièrement couvert d’une pubescence marron foncé (chez la femelle) à noir (chez le mâle). Corps orné d’une bande médiane blanche coupée longitudinalement en son milieu par un fin sillon glabre. Une bande de pilosité blanche recouvre également les bords du pronotum, de chaque côté des protubérances coniques.
Détermination
Assez simple.
Espèces proches
Confusion possible avec d’autres espèces de Dorcadion mais I. arenarium marsicanum est le seul à ne posséder qu’une seule bande blanche.
Période d’observation
L’adulte est actif de fin mars à début mai.
Biologie-éthologie
L’adulte est aptère et diurne. Les larves terricoles consomment les tiges de fétuque qu’elles rongent par la base en les tirant dans le sol.
Biogéographie et écologie
Espèce largement répandue dans le quart sud-est de l’Europe. En France, l’espèce héliophile est localisée dans la vallée de l’Arc (Savoie) uniquement. Son habitat est constitué de pelouses et prairies alpines.
Sources Berger, P. 2012. Coléoptères Cerambycidae de la faune de France continentale et de Corse - Actualisation de l'ouvrage d'André Villiers, 1978. Revue de l’Association Roussillonnaise d’Entomologie, supplément tome XXI, 664 p. Touroult, J., Cima, V., Bouyon, H., Hanot, C., Horellou, A., Brustel, H., 2019. Longicornes de France Atlas préliminaire (Coleoptera : Cerambycidae & Vesperidae). Supplément au bulletin d’ACOREP – France, Paris. 176 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.