DragonflyPix

Cordulegaster bidentata

• English name: Sombre Goldenring
• German name: Gestreifte Quelljungfer
• French name: Cordulégastre bidenté
• Dutch name: Zuidelijke bronlibel
• Swedish name: N/A
• Norwegian name: N/A
• Finnish name: N/A
• Danish name: N/A
• Italian name: Guardaruscello collinare
• Czech name: páskovec dvojzubý
• Slovenian name: Povirni studenčar
• Bulgarian name: Двузъбесто воденичарче

Cordulegaster bidentata

Distribution map Cordulegaster bidentata

Map data based on J.-P. Boudot & V. J. Kalkman (eds.),
Atlas of the European Dragonflies and Damselflies


General ➤ a very large black-and-yellow species with a patchy distribution in Central and South-Eastern Europe
Classification • suborder: Anisoptera (dragonflies); family: Cordulegastridae
Scientific name Cordulegaster bidentata Selys, 1843
Distribution • click or tap the Map button above
Notes ➤ for an overview of the differences between the species in the boltonii and the bidentata groups, tap or click here
  • the female lays her eggs by thrusting her abdomen repeatedly into wet mud, moss, etc.
  • two species of the bidentata group very rarely co-occur at the same site; therefore if two Cordulegaster species co-occur, they very probably belong to different groups
Habitat • small shaded streams but also moss-covered dripping rocks
Dimensions • typical body length: 69-78 mm; hindwing: 45-50 mm
Both sexesHead• the eyes are green (brown in immature animals)
  • the occipital triangle is black
 Thorax• the thorax is black with three yellow bands, of which the middle one is heavily reduced and may even be absent
MaleAbdomen• each upper appendage bears two teeth on the underside (rather than one, as in the species of the boltonii group)
Photographs • all of our photos below were made in the South of Italy and in Austria

Line DrawingLineDrawing: the male's abdomen in dorsal view, and the male's head, thorax and abdomen in lateral view.

The boltonii group (left) and the bidentata group (right)
The former comprises C. boltonii, trinacriae, heros and picta.
The latter comprises C. bidentata, insignis and helladica.
In the boltonii group, note:
1. thorax: the middle band is (relatively) well developed,
2. upper appendages: close at base, then diverging, curved
(as opposed to separated at the base, then straight),
3. S1: the yellow spot sits at the bottom edge
(as opposed to the upper segment portion), and
4. anal triangle: typically five (as opposed to three) cells.

Sombre Goldenring (Cordulegaster bidentata)
Male abdomen in dorsal view
Drawing by Ruth Ilka Nüß
© 2013 Lehmann & Nüß and DragonflyPix.com

Sombre Goldenring (Cordulegaster bidentata)
Male head, thorax and abdomen in lateral view
Drawing by Ruth Ilka Nüß
© 2013 Lehmann & Nüß and DragonflyPix.com

Click on a thumbnail to display the photograph (at 1200 x 800 pixels) in a new window.

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Cordulegaster bidentata

1 / 20; PhotoID: Dr666 19/07/2013 16:07 Italy F8 1/350 180mm ISO400 Canon7D -Crop -Flash MF
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Cordulegaster bidentata

2 / 20; PhotoID: Dr695 16/06/2011 13:14 Austria F8 1/80 180mm ISO400 Canon7D -Crop -Flash MF
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Cordulegaster bidentata

3 / 20; PhotoID: Dr696 12/07/2014 15:08 Italy F8 1/250 180mm ISO800 Canon7D -Crop -Flash MF
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Cordulegaster bidentata

4 / 20; PhotoID: Dr935 05/07/2016 17:47 Italy F8 1/400 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

5 / 20; PhotoID: Dr936 05/07/2016 18:02 Italy F8 1/200 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

6 / 20; PhotoID: Dr1211 07/07/2016 18:06 Italy F8 1/250 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

7 / 20; PhotoID: Dr1212 09/07/2016 11:06 Italy F8 1/640 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

8 / 20; PhotoID: Dr1213 09/07/2016 11:55 Italy F8 1/250 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

9 / 20; PhotoID: Dr1214 10/07/2016 18:07 Italy F8 1/250 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

10 / 20; PhotoID: Dr1215 19/07/2016 16:40 Italy F8 1/250 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

11 / 20; PhotoID: Dr1216 26/06/2014 14:03 Austria F8 1/125 180mm ISO400 Canon7D -Crop -Flash MF
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Cordulegaster bidentata

12 / 20; PhotoID: Dr1217 10/07/2016 17:13 Italy F8 1/800 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

13 / 20; PhotoID: Dr1218 26/06/2017 17:01 Italy F8 1/500 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

14 / 20; PhotoID: Dr1219 27/07/2015 17:03 Italy F8 1/640 180mm ISO400 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

15 / 20; PhotoID: Dr1220 12/07/2012 15:40 Italy F8 1/800 180mm ISO400 Canon7D -Crop -Flash MF
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Cordulegaster bidentata

16 / 20; PhotoID: Dr1221 08/07/2014 14:25 Italy F9.5 1/250 180mm ISO200 Canon7D -Crop -Flash MF
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Cordulegaster bidentata

17 / 20; PhotoID: Dr1222 10/07/2016 16:24 Italy F8 1/500 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

18 / 20; PhotoID: Dr1223 19/07/2013 17:12 Italy F8 1/350 180mm ISO400 Canon7D -Crop -Flash MF
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Cordulegaster bidentata

19 / 20; PhotoID: Dr1224 27/07/2015 17:09 Italy F8 1/200 180mm ISO200 Canon7D2 -Crop -Flash MF
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Cordulegaster bidentata

20 / 20; PhotoID: Dr1225 08/07/2014 12:54 Italy F8 1/180 180mm ISO1600 Canon7D -Crop -Flash MF