Pila occidentalis
Authors/Creators
- 1. Botswana National Museum, 331 Independence Avenue, Gaborone, Botswana School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA, Australia
Description
15. Pila occidentalis (Mousson, 1888)
Distribution and year: “Nausche or Nausib” (Nossob) River, Bokspits N/A (Connolly 1912; 1939); Kwando
River, Lizauli [SMWN75897] 1986 (Brown et al. 1992); western Chobe River at Linyanti channel [SMWN76304] 1986 (Brown et al. 1992); Boro River channel opposite Nxaraga Lagoon [ETD4280] 1984 (Brown et al. 1992); Thamalakane River opposite Okavango River Lodge near Maun [ETD4279] 1984 (Brown et al. 1992); Upper panhandle, Okavango Delta 2000 (Appleton et al. 2003); Guma Lagoon, Okavango Delta 2000 (Appleton et al. 2003); Xugana, Okavango Delta [USNM755123, 755124] 1975 (GBIF 2023 b); “ Okavango Marshes” (Okavango Delta) (Connolly 1912; 1939); Okavango Delta 1999 (Jansen van Rensburg 2001), 2018, 2020, 2021, 2022 (GBIF 2023 b); Lake Ngami 1970 (NMSA 2023); Boteti River channel opposite Nxaraga Lagoon; Moremi Game Reserve, approx. 65 km NW of Maun [NHMR993000187266] 2006 (GBIF 2023 b); Thamalakane River, Maun 1930 (NMSA 2023); Shorobe 1930 (NMSA 2023).
Geographic range: Angola, Botswana, Namibia, Zambia.
Habitat: Freshwater.
Notes: This Southern African species is more common in the Okavango Delta and East Caprivi (Brown et al. 1992). The snails can aestivate for long periods (Kristensen et al. 2010 a), their colourless egg clusters are laid on top of rocks above the water line (Appleton & Miranda 2015).
Type locality: Southern edge of the Kunene River, Angola (Mousson 1888).
Sources: Connolly (1912: 257, as Ampullaria occidentalis; 1939: 553); van Bruggen (1966 a: 109); Brown & Kristensen (1989: 11); Brown et al. (1992: 16); Appleton (1996: 19); Brown (1994: 62); Jansen van Rensburg (2001: 29); Appleton (2002: 72); Appleton et al. (2003: 58–68); Appleton & Miranda (2015: 126); GBIF (2023 b).
Conservation status: Least Concern.
Notes
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Scientific name authorship
- Mousson
- Kingdom
- Animalia
- Phylum
- Mollusca
- Order
- Architaenioglossa
- Family
- Ampullariidae
- Genus
- Pila
- Species
- occidentalis
- Taxon rank
- species
- Type status
- holotype
- Taxonomic concept label
- Pila occidentalis (Mousson, 1888) sec. Rapalai, 2024
References
- MOUSSON, A. 1888. Coquilles recueillies dans le Sud-Ouest de l'Afrique par M. le Dr. H. Schinz, determinee par Alb. Mousson. Journal de Conchyliologie 35 (4): 291-301. https://www.biodiversitylibrary.org/page/15921538
- CONNOLLY, M. W. K. 1912. A revised reference list of South African non-marine Mollusca; with descriptions of new species in the South African Museum. Annals of the South African Museum 11 (3): 59-306. https://www.biodiversitylibrary.org/item/43652#page/7
- CONNOLLY, M. W. K. 1939. A monographic survey of South African non-marine Mollusca. Annals of the South African Museum 33: 1-660.
- BROWN, D. S., CURTIS, B. A., BETHUNE, S. & APPLETON, C. C. 1992. Freshwater snails of East Caprivi and the lower Okavango River basin in Namibia and Botswana. Hydrobiologia 246: 9-40. https://doi.org/10.1007/BF00005620
- APPLETON, C. C., CURTIS, B. A., ALONSO, L. E. & KIPPING, J. 2003. Freshwater invertebrates of the Okavango Delta, Botswana. In: Alonso, L. E. & Nordin, L. A. (Eds), A rapid biological assessment of the aquatic ecosystems of the Okavango Delta, Botswana: High Water Survey. RAP Bulletin of Biological Assessment. Vol. 27. Washington, DC:
- GBIF. 2023 b. Occurrence download. The Global Biodiversity Information Facility. https://www.gbif.org/occurrence/download/0257952-
- JANSEN VAN RENSBURG, C. 2001. Snail borne larval trematodes of the Okavango Delta, Botswana. MSc Thesis. Bloemfontein: University of the Free State. http://hdl.handle.net/11660/7458
- KRISTENSEN, T. K., STENSGAARD, A. - S. & CURTIS, B. 2010 a. Pila occidentalis. The IUCN Red List of Threatened Species 2010: e. T 17278 A 6916407. https://www.iucnredlist.org/species/17278/6916407
- APPLETON, C. C. & MIRANDA, N. 2015. Molluscs. In: Griffiths, C., Day, J. A. & Picker, M. (Eds), Freshwater life: A field guide to the plants and animals of Southern Africa. Cape Town: Struik Nature, pp. 124-137.
- VAN BRUGGEN, A. C. 1966 a. Notes on non-marine molluscs from Mozambique and Bechuanaland, with a checklist of Bechuanaland species. Annals of the Transvaal Museum 25 (6): 99-111, pl. 10. https://hdl.handle.net/10520/AJA00411752_297
- BROWN, D. S. & KRISTENSEN, T. K. 1989. A field guide to African freshwater snails. 8. Southern African species. Charlottenlund, Denmark: Danish Bilharziasis Laboratory.
- APPLETON, C. C. 1996. Freshwater molluscs of Southern Africa: With a chapter on Bilharzia and its snail hosts. Pietermaritzburg: University of Natal Press. https://www.researchgate.net/publication/316609957
- BROWN, D. S. 1994. Freshwater snails of Africa and their medical importance. London, Taylor and Francis.
- APPLETON, C. C. 2002. Mollusca. In: Day, J. A. & de Moor, I. J. (Eds), Guides to the freshwater invertebrates of Southern Africa. Vol. 6: Arachnida and Mollusca. Pretoria: Water Research Commission, pp. 42-125. https://www.wrc.org.za/wp-content/uploads/mdocs/TT-