Vestalis atropha Lieftinck, 1965
Endemic of Northern Borneo

 

Sub-Order: ZYGOPTERA Super-Family: CALOPTERYGOIDEA Family: CALOPTERYGIDAE

Family: Calopterygidae
Genus: Vestalis
Species: Vestalis amoena  Vestalis atropha


Ovipositor of a female Vestalis atropha ♀50mm

 

 

Segment 9
S8
S10

 

Segment 10 : Anal appendage and Paraproct

Segment 8 and 9 : Ovipositor of a female damselfly consists of :

Ovipositor :
1-Stylus
2- Basal plate  (Lam)

 

2016-03-12 15:40 MINI HYDRO


Identification Guide to female Vestalis amoena
Identification Guide to
Vestalis amoena Vestalis atropha
Common on Borneo forest streams

50mm

body length = 50mm
hind wing = 35mm
 

 

Identification Guide to ♂ Vestalis amoena

Identification Guide to
Vestalis amoena Vestalis atropha
Common on Borneo forest streams

 

♂ 56mm

 

Dorsal View
Ventral View
Lateral View

hind wing = 32mm

metallic green head, thorax and abdomen


Slender and fairly large with long thin legs. Head and body are mainly metallic- green. No pterostigma on the wings

This male Vestalis atropha size measurement :
Whole body length = 60mm
Front wing length = 36mm
 
Rounded seminal vesicle (end of segment 2) fully stored with sperms ready to mate.

Seminal Vesicle is the bulblike structure at the end of segment two of a male for storing sperm. Before mating, all male odonates translocate sperm from the testes (segment 9) to this penis at segment 2 and stored in the seminal vesicles.
Compare with V. amoena and V. amethystina, the inferior anal appendages of this Vestalis atropha are withered and thin.
Superior anal appendage curved inward and terminally expanded.
The inferior anal appendages (the lower pair of appendages) of Vestalis atropha are so shot and thin that could not be seen from top.

INDEX : Damselfly     May 31, 2017 08:53:35 PM