Bulinus nyassanus

Bulinus nyassanus
Conservation status
	; Least Concern (IUCN 3.1)[1]
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. nyassanus
Binomial name
	Bulinus nyassanus; (E. A. Smith, 1877)[2]
Synonyms
	Physa nyassana E. A. Smith, 1877

Bulinus nyassanus is a species of small air-breathing freshwater snail with a sinistral shell, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ramshorn snails and their allies. This species is endemic to Lake Malawi in Africa, where found both in shallow and relatively deep water.[1] Its shell generally reached a size of up to around 14 mm × 11 mm (0.55 in × 0.43 in).[3]

This detritus-feeder typically burrows slightly into the sediment, no more than 2 cm (0.8 in), unlike some of its relatives like B. globosus, which usually live on rocks or aquatic vegetation.[4] Although only a minority of these snails are infected (generally 2% or less in B. nyassanus), they do play an important role in the spread of bilharzia (schistosomiasis), a parasite that causes "snail fewer" in humans.[4] The snail-eating ciclid fish Trematocranus placodon has a preference for B. nyassanus.[5]

References

Kaunda, E. & Mailosi, A. (2010). "Bulinus nyassanus". The IUCN Red List of Threatened Species. IUCN. 2010: e.T3318A9757549. doi:10.2305/IUCN.UK.2010-3.RLTS.T3318A9757549.en. Retrieved 12 December 2017.
Smith E. A. (1877). "On the shells of Lake Nyasa, and on a few marine species from Mozambique". Proceedings of the Zoological Society of London 1877: 712-722. pages 717-718, plate 75, figure 16-17.
Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance, p. 238. Taylor & Francis. ISBN 0-7484-0026-5.
Madsen, H.; Stauffer, J.R. Jr. (2012). "The burrowing behaviour of Bulinus nyassanus, intermediate host of Schistosoma haematobium, in Lake Malaŵi". African Journal of Aquatic Science. 37 (1): 113–116. doi:10.2989/16085914.2012.666383.
Evers, B.N.; Madsen, H.; McKaye, K.M.; Stauffer, J.R. Jr. (2006). "The schistosome intermediate host, Bulinus nyassanus, is a 'preferred' food for the cichlid fish, Trematocranus placodon, at Cape Maclear, Lake Malawi". Ann Trop Med Parasitol. 100 (1): 75–85. doi:10.1179/136485906X78553. PMID 16417717.

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[iucn-1] Kaunda, E. & Mailosi, A. (2010). "Bulinus nyassanus". The IUCN Red List of Threatened Species. IUCN. 2010: e.T3318A9757549. doi:10.2305/IUCN.UK.2010-3.RLTS.T3318A9757549.en. Retrieved 12 December 2017.

[2] Smith E. A. (1877). "On the shells of Lake Nyasa, and on a few marine species from Mozambique". Proceedings of the Zoological Society of London 1877: 712-722. pages 717-718, plate 75, figure 16-17.

[3] Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance, p. 238. Taylor & Francis. ISBN 0-7484-0026-5.

[Madsen2012-4] Madsen, H.; Stauffer, J.R. Jr. (2012). "The burrowing behaviour of Bulinus nyassanus, intermediate host of Schistosoma haematobium, in Lake Malaŵi". African Journal of Aquatic Science. 37 (1): 113–116. doi:10.2989/16085914.2012.666383.

[5] Evers, B.N.; Madsen, H.; McKaye, K.M.; Stauffer, J.R. Jr. (2006). "The schistosome intermediate host, Bulinus nyassanus, is a 'preferred' food for the cichlid fish, Trematocranus placodon, at Cape Maclear, Lake Malawi". Ann Trop Med Parasitol. 100 (1): 75–85. doi:10.1179/136485906X78553. PMID 16417717.