Französische Keiljungfer

© Clemens M. Brandstetter

     (from Boudot & al. 2009:113): Gomphus graslinii is endemic to southwestern France, Spain and Portugal. The species is rare in the Iberian Peninsula and its known distribution is fragmented, despite recent records in Portugal. In France the northernmost populations have undergone a severe decline during the 20th century due the pollution and poor river management, which brought many populations to extinction. 


Die Französische Keiljungfer, Gomphus graslinii Rambur 1842, ist ein seltener südwesteuropäischer Endemit, der in Frankreich, Spanien und Portugal langsam fliessende Gewässer bewohnt. Leipelt & Suhling (2001) schreiben dazu: "The microdistribution patterns of larval Gomphus graslinii and Oxygastra curtisii in three rivers in southern France were studied. While G. graslinii was caught mainly in sandy reaches covered with leaf litter, O. curtisii was found almost exclusively clinging to alder roots at the river margins. Preferences of habitat structure were determined from habitat selection experiments under outdoor conditions with four types of substrates: (I) gravel, (II) sand, (III) sand covered with leaves, and (IV) alder roots. G. graslinii preferred substrate types III and II over I and IV; O. curtisii preferred IV and III over I and II."

De Knijf & Demolder (2010) berichten über das Vorkommen und die Seltenheit der Art im südlichen Portugal.. 


   Eine Beschreibung der Art in franzöischer Sprache findet sich hier.

Les Landes – Frankreich – Foto: © Alain Cochet.  


 

Literatur:

Boudot J.-P., V. J. Kalkman, M. Amorín, T. Bogdanović, A. Rivera, G. Degabriele, J.L. Dommanget, S. Ferreira, B. Garrigós, M. Jović, M. Kotarac, W. Lopau, M. Marinov, N. Mihoković, E. Riservato, B. Samraoui & W. Schneider 2009: Atlas of the Odonata of the Mediterranean and North Africa. – Libellula Supplement  9:1-256.

De Knijf G. & H. Demolder 2010: Odonata records from Alentejo and Algarve, southern Portugal. – Libellula 29: 61-90. 

Iorio E. 2012: Nouvelles observations de Gomphus graslinii Rambur, 1842 dans le Canal de la Vallée des Baux à Arles (Bouches-du-Rhône) (Odonata, Anisoptera : Gomphidae). – Martinia 28: 103-106. 

Leipelt K.G. & F. Suhling 2001: Habitat selection of larval Gomphus graslinii and Oxygastra curtisii (Odonata: Gomphidae, Corduliidae). – Int. Journal of Odonatology 4:23-34.      

 

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