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Gomphus simillimus Selys, 1840
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Author : S. Wroza
Thank you for your contribution to the improvement of the INPN. The information submitted has been sent to an expert for verification and correction.
Despite the Creative Commons license, please inform the author of the use which will be made of his photo
Abdomen mâle : 33-36 mm ; femelle : 34-38 mm. Ailes postérieures mâle : 29-31 mm ; femelle : 32-33 mm.
Diagnose :
Le corps de cette libellule est jaune verdâtre et noir. La face est jaune et noire avec les yeux nettement séparés. Les pattes sont rayées de jaune et de noir.
Détermination :
Moyennement difficile.
Espèces proches :
Confusion possible avec Gomphus pulchellus. Sur les côtés du thorax du mâle, la suture médiane et les bandes noires sont caractéristiques.
Période d'observation :
Les adultes sont observés de mai à août dans le sud, de juin à août dans le nord.
Biologie et écologie :
Cette espèce typique des cours d'eau lents se reproduit également dans les eaux stagnantes bien oxygénées (gravières et bras morts). La femelle dépose les œufs à la surface de l'eau de préférence dans les zones à fonds sableux et limoneux recouverts de débris végétaux. Après une phase larvaire de 2 à 3 ans, les émergences ont lieu au printemps souvent de manière synchronisée.
Biogéographie :
La distribution de Gomphus simillimus est limitée au sud-ouest de l'Europe et au Maghreb. En France cette espèce est surtout présente en plaine et dans le sud de la Loire.
D'après : Grand, D., Boudot, J.-P & Doucet, G. 2014. Cahier d'identification des Libellules de France, Belgique, Luxembourg et Suisse. Collection Cahier d'identification. Biotope, Mèze : 136 pp. Grand, D. & Boudot, J.-P. 2006. Les Libellules de France, Belgique et Luxembourg. Collection Parthénope. Biotope, Mèze : 480 pp. Dijkstra, K.-D. B. 2007. Guide des libellules de France et d'Europe. Les guides du naturaliste. Delachaux & Niestlé, Paris : 320 pp.
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.
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