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Sphiximorpha est un genre de syrphe particulièrement remarquable de par sa grande ressemblance avec les guêpes. Les antennes sont noires et plus longues que la tête vue du dessus. Elles se terminent par un style apical blanc et sont insérées directement sur le front et non sur une proéminence en forme de tube. Le segment antennaire 2 est aussi long ou plus long que le segment 3 et la face comporte une bande faciale noire sans extension latérale. La tête, le thorax et l'abdomen sont jaune et noir sans pilosité évidente et les yeux sont nus également.
Facilité d'identification :
Moyennement difficile car la longueur des segments antennaires peut être difficile à apprécier.
Espèce présente du sud de la Scandinavie (Suède et Finlande) jusqu'en Espagne et en Grèce. On la retrouve donc dans toute l'Europe centrale. Ses populations sont en forte diminution.
Habitat et biologie:
Espèce particulièrement liée aux forêt alluviales comportant des arbres très âgés avec des coulées de sèves, notamment de peupliers mais également de saules, d'aulnes et de frênes. Elle peut aussi se rencontrer dans les parcs avec de très vieux peupliers ou dans les cultures de chêne liège comportant de vieux arbres. Les adultes sont très souvent assez haut dans les arbres mais ils descendent parfois sur les troncs comportant des coulées de sève où ils peuvent rester sans bouger pendant plusieurs heures. Les larves se développent dans les coulées de sèves et les cavités des arbres vivants.
Speight, M.C.D. (2020) Species accounts of European Syrphidae, 2020. Syrph the Net, the database of European Syrphidae (Diptera), vol. 104, 314 pp., Syrph the Net publications, Dublin.
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.