Aciagrion approximans

Aciagrion approximans,[2] Indian violet dartlet,[3] is a species of damselfly in the family Coenagrionidae. It is found in east[1][4] and south[5][3][4] of India. The range extends to Thailand, China and Cambodia.[4][5][3][4]

Aciagrion approximans
A. a. approximans
A. a. krishna

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Odonata
Suborder: Zygoptera
Family: Coenagrionidae
Genus: Aciagrion
Species:
A. approximans
Binomial name
Aciagrion approximans
(Selys, 1876)
Synonyms
  • Pseudagrion approximans Selys, 1876
  • Aciagrion tillyardi Laidlaw, 1919
  • Enallagma assamica Fraser, 1919
  • Aciagrion krishna Fraser, 1921

Subspecies

Fraser considered the specimen found in northeast as Aciagrion approximans and in south as Aciargion hisopa race krishna.[6][5] A recent study revealed that the subspecies krishna found in south is not conspecific with A. hisopa and found to be very close to A. approximans found in northeast; but differing at the level of subspecies.[4][3]

Description and habitat

It is a small, slim, slender damselfly with violet and black colors. Its thorax is black with lateral violet stripes. Segments 2 to 7 of the abdomen are black on dorsum and violet in the ventral half. Segments 8 and 9 are violet without any marks. Segment 10 is black on dorsum. The lower half of segment 8 is marked with black in A. a. krishna. Female is similar to the male; but paler in colors. Segments 8 and 9 are black and 10 is blue on dorsum.[5][4]

It breeds in ponds, lakes or in slow moving streams.[5][4]

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See also
  • List of odonates of India
  • List of odonata of Kerala

References
  1. Sharma, G. (2010). "Aciagrion approximans". IUCN Red List of Threatened Species. 2010: e.T167347A6332229. doi:10.2305/IUCN.UK.2010-4.RLTS.T167347A6332229.en.
  2. Martin Schorr; Dennis Paulson. "World Odonata List". University of Puget Sound. Retrieved 12 Oct 2018.
  3. "Aciagrion approximans Selys, 1876 – Indian Violet Dartlet". Odonata of India, v. 1.00. Indian Foundation for Butterflies. Retrieved 2017-02-25.
  4. Shantanu Shrikant Joshi; Oleg Kosterin; Krushnamegh Kunte (2016). "New status for Fraser's forgotten Aciagrion approximans krishna, stat. nov. (Odonata: Zygoptera: Coenagrionidae) from theWestern Ghats of India". International Journal of Odonatology. researchgate. 19 (1–2): 41–51. doi:10.1080/13887890.2016.1166463. Retrieved 25 February 2017.
  5. 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. pp. 340–342.
  6. Fraser, F C (1921). "A list of dragonflies from Mahabaleshwar". The Journal of the Bombay Natural History Society. 27: 543.
  7. K.A., Subramanian; K.G., Emiliyamma; R., Babu; C., Radhakrishnan; S.S., Talmale (2018). Atlas of Odonata (Insecta) of the Western Ghats, India. Zoological Survey of India. pp. 130–131. ISBN 9788181714954.

Data related to Aciagrion approximans at Wikispecies

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