Bulinus nasutus
| Bulinus nasutus | |
|---|---|
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia clade Euthyneura clade Panpulmonata clade Hygrophila |
| Superfamily: | Planorboidea |
| Family: | Planorbidae |
| Subfamily: | Bulininae |
| Tribe: | Bulinini |
| Genus: | Bulinus |
| Species: | B. nasutus |
| Binomial name | |
| Bulinus nasutus (von Martens, 1879)[2] | |
| Synonyms[3][4] | |
| |
Bulinus nasutus is a species of tropical freshwater snail with a sinistral shell, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails and their allies.
Subspecies
- Bulinus nasutus nasutus
- Bulinus nasutus productus Mandahl-Barth, 1960[3]
Distribution
The distribution of Bulinus nasutus includes three countries in East Africa:
Type locality is Bagamoyo,[4] now in Tanzania.
Description
The width of the shell is 12 mm.[4] The height of the shell is 25 mm.[4]
The diploid chromosome number is 2n = 36.[4]
Ecology
Bulinus nasutus lives in temporary pools, ditches and burrow-pits.[4]
High concentration of chloride (468-2220 ppm Cl) have been found in pools inhabited by Bulinus nasutus in Tanzania.[4]
Bulinus nasutus can aestivate in the dry mud for about 5-8 months.[4] Respiration of Bulinus nasutus during aestivation is probably aerobic.[4] They aestivate on margins of pools, and thus stop aestivation only in optimal conditions, when the pool is full of water.[4]
Webbe (1962, 1965)[5][6] described population dynamics of Bulinus nasutus in Tanzania.[4]
Mature snails lay eggs during the whole life span,primarily immediately after the main rainfall.[4] Snails 8 weeks old, whose shell is about 8 mm in height, are mature and can lay eggs.[4] However they require more than 12 months of life and 1-2 aestivation periods in order to reach their full size.[4]
This species is an intermediate host for:
- Schistosoma bovis[4]
- Schistosoma haematobium - it is the main intermediate host of Schistosoma haematobium in northwestern Tanzania[4]
- Echinostome spp.[4]
References
- ↑ 1.0 1.1 1.2 1.3 Lange C. N. (2004). Bulinus nasutus. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.1. <www.iucnredlist.org>. Downloaded on 21 June 2011.
- ↑ Martens E. (1879). "Ubersicht der von 1843 bis 1847 in Mossambique gesammelten Mollusca". Monatsberichte der Königlichen Preussischen Akademie der Wissenschaft zu Berlin 44: 727-749.
- ↑ 3.0 3.1 Kyambadde R. (2004). Bulinus nasutus ssp. productus. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.1. <www.iucnredlist.org>. Downloaded on 21 June 2011.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. ISBN 0-7484-0026-5.
- ↑ Webbe G. (1962). "The transmission of Schistosoma haematobium in an area of Lake Province, Tanganyika". Bulletin of the World Health Organisation 27: 59-85.
- ↑ Webbe G. (1965). "Transmission of bilharziasis. 1. Some essential aspects of snail population dynamics and their study". Bulletin of the World Health Organisation 33: 147-153.
External links
- Bulinus nasutus at National Center for Biotechnology Information (NCBI)
- Coles G. C. (1969). "Observations on weight loss and oxygen uptake of aestivating Bulinus nasutus, an intermediate host of Schistosoma haematobium". Annals of Tropical Medicine and Parasitology 63: 393-398.
- Harris R. A., Preston T. M. & Southgate V. R. (1993). "Purification of an agglutinin from the haemolymph of the snails Bulinus nasutus and demonstration of related proteins in other Bulinus spp." Parasitology 106: 127-136.
- Matovu D. S. & Nditi H. P. (1978). "Laboratory experiments on the effect of aestivation on oviposition in Bulinus (Physopsis) nasutus". Proceedings of the International Congress on Schistosomiasis, Cairo, Egypt, 1975: 515-519. Cairo: Ministry of Health.
- McClelland W. F. (1965). "Development of S. haematobium in Bulinus (P.) nasutus. Reports of the East African Institute for Medical Research 1963–64: 15.
- Pringle G., Otieno L. H. & Chimtawi M. B. (1971). "Notes on the morphology, susceptibility to S. haematobium and genetic relationships of Bulinus (P.) globosus and B. (P.) nasutus from north-eastern Tanzania". Annals of Tropical Medicine and Parasitology 65: 211-219.
- Stothard J. R. & Rollinson D. (1997). "Partial DNA sequences from the mitochondrial cytochrome oxidase subunit I (COI) gene can differentiate the intermediate snail hosts Bulinus globosus and B. nasutus (Gastropoda: Planorbidae)". Journal of Natural History 31(5): 727-737. doi:10.1080/00222939700770361.
- Sturrock B. M. (1967). "The effect of infection with Schistosoma haematobium on the growth and reproduction rates of Bulinus (P.) nasutus productus. Annals of Tropical Medicine and Parasitology 61: 321-325.
- Sturrock B. M. (1968). "Resistance of B. (P.) nasutus productus to infection by S. haematobium". Annals of Tropical Medicine and Parasitology 62: 393-397.