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Lost in Time: Re-description and Ecological Re-assessment of two Indian Endemic Elattoneura Cowley, 1935 (Platycnemididae) Damselflies

  • Written by Pankaj Koparde, Sridhar Halali, Ashish Tiple, Parag Ranganekar, Amol Sonawane, Arajush Payra, Prosenjit Dawn, Ashwini Raju, K. A. Subramanian
  • International Journal of Odonatology
  • volume: 24/2021
  • Discription Article
  • PDF
  • 82–94 pp.
  • Release date: 2021-08-13
  • doi: 10.23797/2159-6719_24_6

Odonata, dragonfly, citizen science, conservation, Morphometry, re-description, Peninsular India, threadtails

Description Article (Koparde)

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International Journal of Odonatology 24 (2021)

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Description

The Indian Elattoneura are a difficult group to identify due to their extreme morphological similarity and sparse information in identification keys and on geographical distribution. The ambiguity is prominent among two Peninsular Indian Elattoneura species, E. nigerrima (Laidlaw, 1917) and E. tetrica (Laidlaw, 1917), described a hundred years ago. Both species were described based on male specimens with scant information on their females. The species are IUCN Red-listed, E. nigerrima (Data Deficient) and E. tetrica (Least Concern). Hitherto it was thought that E. nigerrima was smaller than E. tetrica and both have non-overlapping geographical distribution. Here, we re-described both sexes of E. nigerrima; E. tetrica along with morphometric data and geospatial analysis. We found that E. nigerrima is significantly larger than E. tetrica. The species are largely allopatric in distribution, with the former having a much wider spatial distribution than previously thought. Based on our geospatial analysis, we provide occurrence data useful for the future IUCN assessments of E. nigerrima and E. tetrica. We highlight the importance of updating taxonomic status information and data on spatiotemporal distribution to proceed with the conservation of endemic insects such as Elattoneura damselflies. Our study indicates reassessments of Indian Odonata species are urgently needed.  

Pankaj Koparde

School of Ecology & Environmental Management, Faculty of Sustainability Studies, MIT World Peace University, Kothrud, Pune, Maharashtra, India

pankajkoparde@gmail.com

ORCID: 0000-0002-7418-8814

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Sridhar Halali

Department of Zoology, University of Cambridge, Cambridge, CB23EJ, UK

ORCID: 0000-0002-9960-3682

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Ashish Tiple

PG Department of Zoology, Vidyabharati College, Seloo, Wardha, Maharashtra, India

ORCID: 0000-0002-6372-7376

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Parag Ranganekar

Foundation for Environment Research Conservation, No. 407, III-A, Susheela Seawinds, Alto-Vaddem, Vasco-da-Gama, Goa, India

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Amol Sonawane

Jijamata Mahavidyalaya, Sarati, Indapur, Pune, Maharashtra, India

ORCID: 0000-0002-2490-1191

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Arajush Payra

Ramnagar, Purba Medinipur, West Bengal, India

ORCID: 0000-0003-0858-7339

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Prosenjit Dawn

Ashwini Raju

Kalap Trust, G-207, Doon Trafalgar Extension, Dhoran Road, Village Dhorankhas, Pargana Parwadoon, Dehradun, Uttarakhand, India

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