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Zygonyx torridus

Scope: Pan-Africa
Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Odonata Libellulidae

Scientific Name: Zygonyx torridus
Species Authority: (Kirby, 1889)
Regional Assessments:
Common Name(s):
English Ringed Cascader
French Zygonyx du désert
Synonym(s):
Pseudomacromia atlantica Martin, 1900
Zygonyx torrida misspelling
Zygonyx torridus (Kirby, 1899) subspecies insulanus Pinhey, 1981
Zygonyx torridus (Kirbyi, 1899) subspecies isis Fraser, 1924

Assessment Information [top]

Red List Category & Criteria: Least Concern (Regional assessment) ver 3.1
Year Published: 2010
Date Assessed: 2009-05-01
Assessor(s): Clausnitzer, V., Suhling, F., Ferreira, S. & Dijkstra, K.-D.B.
Reviewer(s): Dijkstra, K.-D.B., Clausnitzer, V., Suhling, F., Samways, M., Samraoui, B., Boudot, J.P., Kipping, J. & Allen, D. (IUCN Freshwater Biodiversity Unit) (IUCN Pan Africa Freshwater Biodiversity Assessement workshop, Cairo, 2009).
Justification:
This is a widespread species with no known major widespread threats that is unlikely to be declining fast enough to qualify for listing in a threatened category. It is therefore assessed as Least Concern.

In central, eastern, western, southern and northeastern Africa, the species is also assessed as Least Concern.

In northern Africa, there are between three and five known breeding sites of Zygonyx torridus (three with exuvia, two without) in Morocco, which are not especially isolated from each other, and only a single waterfall site in Tunisia. Up to around 50 adults and 11 exuvia have been seen at one location in Morocco, but they are generally present at much lower numbers. The species can disperse easily. Its area of occupancy in the region is around 6-7 km². There is likely to be movement of adults between the northern African and central and western African populations (as well between the Iberian populations), so despite the low number of breeding sites within the northern African region, and the small range, the species is assessed as Near Threatened for the region (dropping the preliminary Vulnerable assessment down by one category). However, there is a great need for more studies of this species to better understand the population dynamics between the regional distributions, and the threat status of the species may increase with better data.

Geographic Range [top]

Range Description: The species is widespread in Africa, southern Europe, Middle East and southern Asia.

In central Africa, it is known from Angola, Cameroon, Democratic Republic of Congo, Congo, Central African Republic, Zambia.

In eastern Africa, it has been recorded in Kenya, Tanzania, Uganda, Malawi and Burundi: common and widespread in all 5 countries (Burundi assumed).

The species is potentially present in the southern countries of the northern African region (Mauritania and Mali), but, to date, there are no records for these countries.

In northeastern Africa, the species is recorded from Egypt, Ethiopia and Sudan. Its presence in Uganda is assumed.

In southern Africa, the species is widespread in the southern Africa region, except for in the Kalahari.

In western Africa, the species is known from Nigeria to Gambia.
Countries occurrence:
Native:
Afghanistan; Algeria; Angola (Angola); Benin; Botswana; Burkina Faso; Cameroon; Central African Republic; Comoros; Congo; Congo, The Democratic Republic of the; Côte d'Ivoire; Egypt; Ethiopia; Gambia; Ghana; Guinea; India; Iran, Islamic Republic of; Iraq; Israel; Italy (Sardegna, Sicilia); Kenya; Liberia; Malawi; Mauritius; Morocco; Mozambique; Namibia; Nigeria; Oman; Pakistan; Portugal; Réunion; Sierra Leone; South Africa; Spain; Sudan; Tanzania, United Republic of; Togo; Tunisia; Turkey; Uganda; United Arab Emirates; Yemen; Zambia; Zimbabwe
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This is a widespread species. In northern Africa, the species is a vagrant with several potential and recorded breeding sites in Morocco. There is probably an exchange between populations in Iberian and those in central, western and northern Africa. Very small numbers of exuvia have been collected, to a maximum of 50 adults and 11 exuvia at one location. The species forms migrant clouds that may move from location to location.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: It is found in streams and rivers in bush, savannah, woodland and thin forest, often above or near rapids.

In northern Africa,typical habitats of the species are waterfalls and rapids of permanent rivers and brooks in the steppe and arid regions. Suitable sites are frequently successfully settled, even if they are extremely isolated, as in tropical rainforest or in desert (Kunz et al. 2006).
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): There is no much information available on specific threats and the available data give no indication of a decline of the species in this region (Kunz et al. 2006). Water pollution, abstraction and river damming are the key threats. In the Canary Islands, human impacts on the natural freshwater resources are the main threat to the species (Kunz et al. 2006).

Conservation Actions [top]

Conservation Actions: No precise information available but research into trends and monitoring of the species would be valuable. Control of water pollution, and conservation of habitats are also needed.

Classifications [top]

5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
suitability: Suitable  
2. Land/water management -> 2.1. Site/area management

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
2. Agriculture & aquaculture -> 2.1. Annual & perennial non-timber crops -> 2.1.3. Agro-industry farming
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

7. Natural system modifications -> 7.2. Dams & water management/use -> 7.2.8. Abstraction of ground water (unknown use)
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

7. Natural system modifications -> 7.2. Dams & water management/use -> 7.2.11. Dams (size unknown)
♦ timing: Future    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.1. Domestic & urban waste water -> 9.1.1. Sewage
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.1. Domestic & urban waste water -> 9.1.3. Type Unknown/Unrecorded
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.2. Industrial & military effluents -> 9.2.3. Type Unknown/Unrecorded
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.3. Agricultural & forestry effluents -> 9.3.4. Type Unknown/Unrecorded
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.2. Population size, distribution & trends
3. Monitoring -> 3.1. Population trends

Bibliography [top]

Dijkstra, K.-D and Lewington, R. 2006. Field Guide to the Dragonflies of Britain and Europe. British Wildlife Publishing, Gillingham, Dorset, UK.

Dijkstra, K.-D.B. and Clausnitzer, V. 2005. An annotated checklist of the dragonflies (Odonata) of eastern Africa, with critical lists for Ethiopia, Kenya, Malawi, Tanzania and Uganda, new records, taxonomic notes and descriptions of new species. Tijdschrift voor Entomologie in prep.

Dijkstra, K.-D.B. and Clausnitzer, V. 2014. The Dragonflies and Damselflies of Eastern Africa: Handbook for all Odonata from Sudan to Zimbabwe. Studies in Afrotropical Zoology 298: 1-264.

IUCN. 2006. 2006 IUCN Red List of Threatened Species. Gland, Switzerland and Cambridge, UK Available at: www.iucnredlist.org. (Accessed: 05 June).

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).

Kipping, J. 2006. The Odonata of Botswana - an annotated checklist. Cimbebasia Memoirs 5: In press.

Kunz, B., Ober, S. and Jödicke, R. 2006. The distribution of Zygonyx torridus in the Palaearctic (Odonata: Libellulidae). Libellula 25(1/2): 89-108.

Longfield, C. 1947. The Odonata of South Angola. Arquivos do Museu Bocage, Lisboa 16: 1-31.

Longfield, C. 1955. The Odonata of North Angola. Part I. Publicações culturais Companhia de Diamantes de Angola 27: 11-64.

Longfield, C. 1959. The Odonata of North Angola. Part II. Publicações culturais Companhia de Diamantes de Angola 45: 15-41.

Martens, A. Jödicke, R. and Suhling, F. 2003. Annotated checklist of the Odonata of Namibia. Cimbebasia 18: 139-160.

Pinhey, E. 1961. A collection of Odonata from Dundo, Angola. With the descriptions of two new species of Gomphids. Publiçacões culturais Companhia de Diamantes de Angola Lisboa 56: 71-76.

Pinhey, E. 1964. Dragonflies (Odonata) of the Angola-Congo borders of Rhodesia. Publiçacões culturais Companhia de Diamantes de Angola Lisboa 63: 97-129.

Pinhey, E. 1965. Odonata from Luanda and the Lucala River, Angola. Revista de Biologia, Lisboa 5: 159-164.

Pinhey, E. 1967. Odonata of Ngamiland. Arnoldia 15: 1-17.

Pinhey, E. 1975. A collection of Odonata from Angola. Arnoldia 23: 1-16.

Pinhey, E. 1976. Dragonflies (Odonata) of Botswana, with ecological notes. Occasional papers of the national Museums and Monuments of Rhodesia, Series B 5: 524-601.

Pinhey, E. 1981. Checklist of the Odonata of Mozambique. Occasional papers of the national Museums and Monuments of Rhodesia, Series B 6: 557-631.

Pinhey, E. 1984. A check-list of the Odonata of Zimbabwe and Zambia. Smithersia 3: 1-64.

Pinhey, E. 1984. A survey of the dragonflies (Odonata) of South Africa. Part 1. Journal of the Entomological Society of South Africa 47: 147-188.

Pinhey, E. 1985. A survey of the dragonflies (Odonata) of South Africa. Part 2. Anisoptera. Journal of the Entomological Society of South Africa 48: 1-48.

Ris, F. 1931. Odonata aus Süd-Angola. Revue Suisse de Zoologie 38: 97-112.

Samways, M.J. 1999. Diversity and conservation status of South African dragonflies (Odonata). Odonatologica 28: 13-62.

Samways, M.J. 2002. A strategy for national red listing invertebrates based on experiences with Odonata in South Africa. African Entomology 10: 43-52.

Suhling, F., Sahlén, G., Martens, A., Marais, E. and Schütte, C. 2006. Dragonfly assemblages in arid tropical environments: a case study from western Namibia. Biodiversity and Conservation 15: 311-332.

Tarboton, W. and Tarboton, M. 2002. A field guide to the dragonflies of South Africa. Tarboton and Tarboton, Nylstroom.

Tarboton, W. and Tarboton, M. 2005. A fieldguide to the damselflies of South Africa. Tarboton and Tarboton, Nylstroom.


Citation: Clausnitzer, V., Suhling, F., Ferreira, S. & Dijkstra, K.-D.B. 2010. Zygonyx torridus. The IUCN Red List of Threatened Species 2010: e.T60078A12225431. . Downloaded on 06 May 2016.
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