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Mesocnemis dupuyi

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA INSECTA ODONATA PLATYCNEMIDIDAE

Scientific Name: Mesocnemis dupuyi
Species Authority: Legrand, 1982
Common Name/s:
English Gambia Riverjack

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2010
Date Assessed: 2006-07-05
Assessor/s: Dijkstra, K.-D.B.
Reviewer/s: Amakye, J.S., Ogbogu, S.S., Tchibozo, S. & Smith, K. (IUCN Freshwater Biodiversity Unit)
Justification:
This is species is short-listed by Dijkstra and Vick (2004) as western African odonate requiring special attention. It is known from a few sites along the upper course of the Gambia river, below the site of the proposed dam. It has an extent of occurrence of less than 20,000 km², possibly less than 5,000 km². Despite being a conspicuous insect occurring in what seems a widespread habitat, it has not been found elsewhere. Even though there appear to be no threats to the species as deforestation is not thought to have any impact  as it prefers open areas, the proposed dam will regulate flow regime and therefore irregular discharge (daily release of large quantities of water), which could impact negatively the species, is not expected. As there are no specific threats to the species it is listed as Near Threatened as it is close to meeting criteria under B1. If the habitat proves to be imperilled (maybe predictions regarding the dam and deforestation rates are proved wrong), then species could be assessed as Vulnerable or Endangered.
History:
2009 Near Threatened
2006 Near Threatened (IUCN 2009.2)

Geographic Range [top]

Range Description: The species is only known from the Upper The Gambia River in Senegal and Gambia. Dumont (1978) recorded 'small M. singularis' from a site in Senegal where later part of the type material of M. dupuyi was collected. Presumably these were all M. dupuyi.
Countries:
Native:
Gambia; Senegal
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: No information available.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Perched on tufts of Cyperacea along the river (Dumont 1978) in the Gambia River.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): There is a proposal of construction of a dam in The Gambia river in Senegal, near the border with Guinea, which will regulate the flow regime of the river. It is believed that this will not have a severe negative impact upon the species, but its real future impact is unknown. Deforestation is occurring along the river, but this is not thought to be a threat to the species as it prefers open land.

Conservation Actions [top]

Conservation Actions: Part of the species range is within the Niakola-Koba National Park in Senegal. Research into population numbers and range, biology and ecology, habitat status, threats, and trends/monitoring of this species would be valuable.
Citation: Dijkstra, K.-D.B. 2010. Mesocnemis dupuyi. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 20 April 2014.
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