101 025 Proischnura rotundipennis Round winged Bluet Male Ezomvhelo MP March 2016 1

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Round-winged Bluet.    Rondevlerkbloutjie.

(Ris, 1921)

Short Description:

Very small, bright blue and black with rounded wings, distinctive round black pterostigmas with blue margins.

Key identification features:

The face is light blue and black. The labrum is blue and the postclypeus black. The top of the head is black. Postocular spots are bright blue crescent-shaped. The eyes are blue with black cap. The synthorax is blue. The middorsal stripes of the synthorax are black with thin blue antihumeral stripes and thick black humeral stripes on either side. Sides of the synthorax are light blue. The wings are clear with round wingtips and the round pterostigmas with black centre and bright blue border (sides and hind margin). The abdomen is long and slim. S1 and S2 have a black pattern above and bright blue below. S3–S7 is light blue to light brown with continuous black stripe. Black stripe ends squarely at the end of S7. The S8 is all bright blue and first half of S9 is bright blue. S 10 is black above.
Female is greenish blue to light brown. Very small postocular spots. Grey to black abdomen with the same markings as the male. The black pterostigmas have a pale blue border.

Compared with other species:

Africallagma sapphirinum has a more distinctive bright sapphire blue colour. Africallagma glaucum is paler and has linear postocular spots while the Africallagma fractum has bigger wedge like postocular spots.  The first half of S9 of the Proischnura rotundipennis is bright blue, but it is all blue in most of the other bluet species, except Mauve Bluet Proischnura rotundipennis has round black with blue rimmed pterostigmas and round wingtips.

Distribution and habitat:

Endemic to South Africa.
This specie is found in the upland grassland from Eastern Cape up to Mpumalanga, Gauteng and KZN. Frequents still water habitats like pools, dams and still parts of small streams with an abundance of tall grasses, reeds and sedges.

Behaviour:

Perch high on plant stems.

Further reading:

Books"
A guide to Dragonflies and Damselflies of South Africa .   p. 97

Dragonflies and Damselflies of South Africa.    p. 100
Dragonfly Biotic Index p. 92

Websites of interest:
A Visual Guide to the Damselflies and Dragonflies of South Africa

Odonata Atlas of Africa - VMU Number 663170
African Dragonflies and Damselflies Online
The IUCR Red List of Threatened Species
Other Information:
Size Comparison Diagram: Dragonflies and Damselflies
Morphology of a Dragonfly Sketch 1 and Sketch 2 and Damselfly
Map of South Africa

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