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.
| Bulinus nasutus | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Superorder: | Hygrophila |
| Family: | Planorbidae |
| Genus: | Bulinus |
| Species: | B. nasutus
|
| Binomial name | |
| Bulinus nasutus (von Martens, 1879)[2]
| |
| Synonyms[3][4] | |
| |
Subspecies edit
- Bulinus nasutus nasutus
- Bulinus nasutus productus Mandahl-Barth, 1960[3]
Distribution edit
The distribution of Bulinus nasutus includes three countries in East Africa:
Type locality is Bagamoyo,[4] now in Tanzania.
Description edit
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 edit
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 has much 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 edit
- ^ a b c d Van Damme, D.; Lange, C. (2017). "Bulinus nasutus". IUCN Red List of Threatened Species. 2017: e.T184537A110775340. doi:10.2305/IUCN.UK.2017-1.RLTS.T184537A110775340.en. Retrieved 18 November 2021.
- ^ 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.
- ^ a b Van Damme, D.; Lange, C. (2017). "Bulinus productus". IUCN Red List of Threatened Species. 2017: e.T184779A110775829. doi:10.2305/IUCN.UK.2017-1.RLTS.T184779A110775829.en. Retrieved 18 November 2021.
- ^ a b c d e f g h i j k l m n o p q r 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 Organization 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 Organization 33: 147-153.
External links edit
- 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.