Ischnura rubilio

Western golden dartlet
male
female
Scientific classification
Kingdom:Animalia
Clade:Euarthropoda
Class:Insecta
Order:Odonata
Suborder:Zygoptera
Family:Coenagrionidae
Genus:Ischnura
Species: I. rubilio
Binomial name
Ischnura rubilio
Selys, 1876
Synonyms
  • Ischnura aurora rubilio Selys, 1876

Ischnura rubilio,[1] western golden dartlet,[2] is a species of damselfly in the family Coenagrionidae.[2]

It is a small apple green damselfly with black thoracic stripes and blue tipped yellow tail.[3][4][2]

Earlier it was considered as a subspecies of Ischnura aurora, distributed from Australia and Pacific Islands.[5] There are strong differences in DNA between the Asian forms of the species and specimens from the Pacific.[5] There is also some morphological differences; dorsal side of segment 8 and 9 are entirely blue in Asian forms compared to only 1/3 of length of segment 8 is blue in specimens from the Pacific.[6] The form found in Indian subcontinent and Iran is Ischnura aurora rubilio Selys, 1876 and is now considered as a good species, Ischnura rubilio.[7]

Description

Its a small damselfly with grass green thorax with bronzed black color on dorsal side with narrow grass-green antehumeral stripes. The wing spots are different in fore and hindwings. It is rose-red for its proximal half, hyaline for the distal, inner and posterior borders in forewings and uniform pale grey in hindwings. Abdomen is citron-yellow, except segments 8 to 10, which are azure blue in color. There is a large sub-apical diamond-shaped spot on dorsum side of segment 6. Segment 7 is broadly bronzed black except at sides. Segments 8 to 10 entirely azure blue and in the last segment, there is a broad quadrate black dorsal spot. Anal appendages are pale ochreous, tipped with black or suffused with reddish-brown.[3]

The female is a stouter and less conspicuously marked insect than the male. Its abdomen is with a broad black dorsal stripe extending the whole length, but interrupted by narrow yellow annules on segment 1, base of segment 8, and apical borders of segments 9 and 10. The sides of the abdomen is broadly yellow, paling to greenish beneath.[3]

See also

References

  1. ↑ "World Odonata List". Slater Museum of Natural History. Retrieved 2017-03-03.
  2. 1 2 3 "Ischnura rubilio Selys, 1876 – Western Golden Dartlet". Odonata of India, v. 1.00. Indian Foundation for Butterflies. Retrieved 2017-03-03.
  3. 1 2 3 C FC Lt. Fraser (1933). The Fauna of British India, including Ceylon and Burma, Odonata Vol. I. Red Lion Court, Fleet Street, London: Taylor and Francis.
  4. ↑ Subramanian, K. A. (2005). Dragonflies and Damselflies of Peninsular India - A Field Guide.
  5. 1 2 Dow, R.A., Rowe, R. & Marinov, M. (2013). "Ischnura aurora". IUCN Red List of Threatened Species. IUCN. 2013: e.T167375A1177456. doi:10.2305/IUCN.UK.2013-1.RLTS.T167375A1177456.en. Retrieved 2017-03-03.
  6. ↑ Rj, Rowe (2010-08-13). "Ischnura aurora (Brauer 1865) (Zygoptera: Coenagrionidae), an Australo-Pacific species". New Zealand Journal of Zoology. 37, 2010 - Issue 2: 189–192 – via Taylor & Francis.
  7. ↑ DUMONT, H.J. (December 2013). "PHYLOGENY OF THE GENUS ISCHNURA, WITH EMPHASIS ON THE OLD WORLD TAXA (ZYGOPTERA: COENAGRIONIDAE)" (PDF). Odonatologica. 42(4): 301–308.
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