Petit aphodien brun-noir oblong. Critères diagnostics (de l'avant vers l'arrière) : a) la tête est noire, b) le pronotum est bien convexe, noir avec de gros points épars et est rebordé le long de sa base postérieure, c) les tibias antérieurs ont une carène qui est non denticulée sur sa face inférieure d) le scutellum est court, pentagonal et mat e) les élytres ont leurs côtés parallèles, sont luisants, noirs, avec des stries peu profondes et des interstries à peu près plans, f) la couronne de soies située à l'apex des métatibias est composée de soies courtes et égales, g) le premier article du métatarse postérieur est égal à l'éperon apical supérieur du tibia.
Détermination
Des confusions sont possibles. Espèces morphologiquement proches : Calamosternus granarius (Linnaeus, 1767) a le premier article du métatarse postérieur plus court que l'éperon apical supérieur du tibia. Nialus varians (Duftschmid, 1805) et les espèces du genre Liothorax ont le pronotum non rebordé le long de sa base postérieure.
Période d'observation
Les adultes sont observables principalement en fin d'automne et en hiver.
Biologie-éthologie
Espèce non strictement coprophage pouvant se nourrir de végétaux en décomposition. La larve peut se développer dans le sol.
Biogéographie et écologie
L'espèce est présente du Maroc à la Lybie, en Sicile, Sardaigne et Corse. L'espèce semble euryèce.
Pierre JAY ROBERT(UFR3/Faculté Sciences Humaines & Sciences de l'Environnement Centre d'Ecologie Fonctionnelle et Evolutive),2021
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
