DragonflyPix

Ischnura saharensis

• English name: Sahara Bluetail
• German name: Sahara-Pechlibelle
• French name: N/A
• Dutch name: Saharalantaarntje
• Swedish name: N/A
• Norwegian name: N/A
• Finnish name: N/A
• Danish name: N/A
• Italian name: N/A
• Czech name: N/A
• Slovenian name: N/A
• Bulgarian name: N/A

Ischnura saharensis

Distribution map Ischnura saharensis

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


General ➤ a small species, very similar to I. elegans, which in Europe occurs only on the Canary Islands
Classification • suborder: Zygoptera (damselflies); family: Coenagrionidae
Scientific name Ischnura saharensis Aguesse, 1958
Distribution • click or tap the Map button above
Notes • belongs to the elegans group, together with I. elegans, I. genei and I. graellsii
  • not known to co-occur in Europe with I. elegans, I. genei or I. graellsii, but may co-occur with I. senegalensis on the Canary Islands
  violacea and rufescens are immature female colour forms, which with age develop into one of the three mature forms: violacea (with its antehumeral stripe) into either typica or infuscans; rufescens (without an antehumeral stripe) into infuscans-obsoleta; see below for details
Habitat • any still or slow-flowing water with a rich vegetation
Dimensions • typical body length: 26-31 mm; hindwing: 12-17 mm
Both sexesWings• the pterostigma in the forewing is the same size as that in the hindwing
MaleThorax• the lower side of the thorax and the antehumeral stripe (which may be narrow or even absent) are green
  ➤ the pronotum does not bear an upright projection
  • compared to I. senegalensis the black line on the interpleural suture tends to be much thicker, longer and more clearly visible
 Abdomen• the abdomen is black on top, but S8 is sky blue
  ➤ the black upper part of S2 is separated from the green lower part in a straight line
  • compared to I. senegalensis the tubercle on S10 is much larger and more clearly visible
 Wings• the pterostigma in the forewing is bicoloured: black on the inside, white on the outside; the pterostigma in the hindwing is uniformly beige/brown
FemaleThorax• the side of the thorax is either green (in the form typica), pale lilac (in the form violacea), orange/pink (in the form rufescens), or green-orange-brown (in the forms infuscans and infuscans-obsoleta)
  • the antehumeral stripe is of the same colour as the side of the thorax (see above) but is absent in the forms rufescens and infuscans-obsoleta
 Abdomen• the abdomen is black on top, but S8 is sky blue in the forms typica, violacea and rufescens or brown in the forms infuscans and infuscans-obsoleta; this tail-light is usually uninterrupted
  • the abdomen has a vulvar spine underneath S8
 Wings• the pterostigma is uniformly beige/brown in both wings
Photographs • nearly all of our photos below were made on the Canary Islands in May-June 2014

Ischnura saharensis (left) and I. senegalensis (right); thorax, male
Note: in I. saharensis the black line on the interpleural suture is much thicker and longer.

Ischnura saharensis (left) and I. senegalensis (right); abdomen, male
Note: in I. saharensis the green and black portions of S2 are separated in a straight line.

Ischnura saharensis (left) and I. senegalensis (right); abdomen, male
Note: in I. saharensis the tubercle on S10 is much larger.

Ischnura saharensis (left, centre) and I. senegalensis (right); abdomen, female
Note: in I. saharensis S8 is either blue or brown on top; in the gynochrome form of I. senegalensis it is black.

Males in the elegans group; pronotum
I. elegans (1), I. genei (2), I. graellsii (3), I. sahrensis(4)
Note the upright projection in I. elegans; it is absent in the other species.

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

Ischnura saharensis, thumbnail 1 / 20
1 / 20; PhotoID: Da881 04/06/2014 10:59 Spain F8 1/125 180mm ISO200 Canon7D -Crop -Flash MF
Ischnura saharensis, thumbnail 2 / 20
2 / 20; PhotoID: Da882 06/10/2009 11:40 Tunisia F8 1/200 180mm ISO100 Canon50D -Crop -Flash MF
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3 / 20; PhotoID: Da883 06/10/2009 11:41 Tunisia F5.6 1/320 180mm ISO100 Canon50D -Crop -Flash MF
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4 / 20; PhotoID: Da884 04/06/2014 11:43 Spain F8 1/125 180mm ISO400 Canon7D -Crop -Flash MF
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5 / 20; PhotoID: Da885 04/06/2014 14:44 Spain F8 1/180 180mm ISO400 Canon7D -Crop -Flash MF
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6 / 20; PhotoID: Da886 04/06/2014 15:49 Spain F8 1/180 180mm ISO200 Canon7D -Crop -Flash MF
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7 / 20; PhotoID: Da887 04/06/2014 15:54 Spain F9.5 1/125 180mm ISO200 Canon7D -Crop -Flash MF
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8 / 20; PhotoID: Da888 04/06/2014 15:59 Spain F8 1/125 180mm ISO400 Canon7D -Crop -Flash MF
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9 / 20; PhotoID: Da889 07/06/2014 12:10 Spain F8 1/180 180mm ISO200 Canon7D -Crop -Flash MF
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10 / 20; PhotoID: Da890 26/05/2014 11:40 Spain F8 1/90 180mm ISO400 Canon7D -Crop -Flash MF
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11 / 20; PhotoID: Da891 26/05/2014 11:47 Spain F8 1/180 180mm ISO200 Canon7D -Crop -Flash MF
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12 / 20; PhotoID: Da892 27/05/2014 14:09 Spain F8 1/250 180mm ISO200 Canon7D -Crop -Flash MF
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13 / 20; PhotoID: Da893 27/05/2014 15:32 Spain F8 1/180 180mm ISO200 Canon7D -Crop -Flash MF
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14 / 20; PhotoID: Da894 27/05/2014 15:52 Spain F8 1/180 180mm ISO200 Canon7D -Crop -Flash MF
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15 / 20; PhotoID: Da915 02/06/2014 15:22 Spain F8 1/250 180mm ISO400 Canon7D -Crop -Flash MF
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16 / 20; PhotoID: Da916 02/06/2014 16:49 Spain F8 1/180 180mm ISO200 Canon7D -Crop -Flash MF
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17 / 20; PhotoID: Da917 02/06/2014 17:12 Spain F8 1/250 180mm ISO200 Canon7D -Crop -Flash MF
Ischnura saharensis, thumbnail 18 / 20
18 / 20; PhotoID: Da918 04/06/2014 10:11 Spain F8 1/180 180mm ISO200 Canon7D -Crop -Flash MF
Ischnura saharensis, thumbnail 19 / 20
19 / 20; PhotoID: Da919 04/06/2014 10:45 Spain F8 1/350 180mm ISO400 Canon7D -Crop -Flash MF
Ischnura saharensis, thumbnail 20 / 20
20 / 20; PhotoID: Da920 04/06/2014 10:55 Spain F8 1/180 180mm ISO400 Canon7D -Crop -Flash MF