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|2=''[[Biomphalaria schrammi]]''
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However, further analysis of the African ''Biomphalaria'' species found only ''B. camerunensis'' and ''B. pfeifferi'' were the only definitive African species, with the remain species being apart (or a sister taxa to) the "Nilotic species complex":<ref>{{Cite journal |last1=Jørgensen |first1=Aslak|last2=Kristensen |first2=Thomas K. |last3=Stothard |first3=J. Russell |date=October 2007 |title=Phylogeny and biogeography of African Biomphalaria (Gastropoda: Planorbidae), with emphasis on endemic species of the great East African lakes |url=http://dx.doi.org/10.1111/j.1096-3642.2007.00330.x |journal=Zoological Journal of the Linnean Society |volume=151 |issue=2 |pages=337–349 |doi=10.1111/j.1096-3642.2007.00330.x |issn=1096-3642}}</ref>
The topology was consistent with the proposed Neotropical origins of the genus, with the oldest ''Biomphalaria'' fossils being dated from approximately 60 million years ago.<ref>{{Citation |last=Jarne |first=Philippe |title=Biosystematics of Biomphalaria spp. with an Emphasis on Biomphalaria glabrata |date=2011 |url=https://doi.org/10.1007/978-1-4419-7028-2_1 |work=Biomphalaria Snails and Larval Trematodes |pages=1–32 |editor-last=Toledo |editor-first=Rafael |access-date=2023-04-02 |place=New York, NY |publisher=Springer |language=en |doi=10.1007/978-1-4419-7028-2_1 |isbn=978-1-4419-7028-2 |last2=Pointier |first2=Jena-Pierre |last3=David |first3=Patrice |editor2-last=Fried |editor2-first=Bernard}}</ref> However, further analysis of the African ''Biomphalaria'' species found only ''B. camerunensis'' and ''B. pfeifferi'' were the only definitive African species, with the remain species being apart of (or a sister taxa to) the "Nilotic species complex":<ref>{{Cite journal |last1=Jørgensen |first1=Aslak|last2=Kristensen |first2=Thomas K. |last3=Stothard |first3=J. Russell |date=October 2007 |title=Phylogeny and biogeography of African Biomphalaria (Gastropoda: Planorbidae), with emphasis on endemic species of the great East African lakes |url=http://dx.doi.org/10.1111/j.1096-3642.2007.00330.x |journal=Zoological Journal of the Linnean Society |volume=151 |issue=2 |pages=337–349 |doi=10.1111/j.1096-3642.2007.00330.x |issn=1096-3642}}</ref>
[[File:Biomphalaria Phylogenetic Tree.png|left|frame|African Biomphalaria phylogenetic tree.png ]]
[[File:Biomphalaria Phylogenetic Tree.png|left|frame|African Biomphalaria phylogenetic tree.png ]]






All of the African ''Biomphalaria'' species have low levels of genetic diversity<ref>{{Cite journal |last=Morgan |first=Jess A. T |last2=DeJong |first2=Randall J |last3=Jung |first3=Younghun |last4=Khallaayoune |first4=Khalid |last5=Kock |first5=Sonja |last6=Mkoji |first6=Gerald M |last7=Loker |first7=Eric S |date=2002-12-01 |title=A phylogeny of planorbid snails, with implications for the evolution of Schistosoma parasites |url=https://www.sciencedirect.com/science/article/pii/S1055790302002804 |journal=Molecular Phylogenetics and Evolution |language=en |volume=25 |issue=3 |pages=477–488 |doi=10.1016/S1055-7903(02)00280-4 |issn=1055-7903}}</ref><ref>{{Citation |last=Van Damme |first=Dirk |title=Freshwater Molluscs of the Nile Basin, Past and Present |date=2009 |url=https://doi.org/10.1007/978-1-4020-9726-3_29 |work=The Nile: Origin, Environments, Limnology and Human Use |pages=585–629 |editor-last=Dumont |editor-first=Henri J. |access-date=2023-04-02 |place=Dordrecht |publisher=Springer Netherlands |language=en |doi=10.1007/978-1-4020-9726-3_29 |isbn=978-1-4020-9726-3 |last2=Van Bocxlaer |first2=Bert}}</ref> , which is likely the result of their relatively recent evolutionary history.







Revision as of 10:50, 2 April 2023

Biomphalaria
Temporal range: Eocene–Recent
An albino individual of Biomphalaria glabrata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Superorder: Hygrophila
Family: Planorbidae
Subfamily: Planorbinae
Tribe: Helisomatini
Genus: Biomphalaria
Preston, 1910[1]
Type species
Biomphalaria smithi
Preston, 1910
Diversity[2]
34 species
Synonyms

Taphius (H. Adams & A. Adams, 1855) Planorbis (Planorbina) (Haldeman, 1842)

Biomphalaria is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies.[3][4]

Biomphalaria is the type genus of the tribe Biomphalariini.

Both Planorbis and Taphius are synonyms for Biomphalaria.[3][5]

The shell of this species, like all planorbids is sinistral in coiling, but is carried upside down and thus appears to be dextral.

Apical, apertural and umbilical view of the shell of Biomphalaria tenagophila. Scale bar is 3 mm.

Species

As of 2008 there were recognized 34[6] extant species in the genus Biomphalaria in total (22 American species and 12 Old World species). There were also described number of fossil Biomphalaria species.

New World (South American) species include:

  1. Biomphalaria amazonica (Paraense, 1966)
  2. Biomphalaria andecola (d'Orbigny, 1835)
  3. Biomphalaria cousini (Paraense, 1966)[7]
  4. Biomphalaria edisoni (Estrada, Velásquez, Caldeira, Bejarano, Rojas & Carvalho, 2006)[8]
  5. Biomphalaria glabrata (Say, 1818)
  6. Biomphalaria havanensis (L. Pfeiffer, 1839)
  7. Biomphalaria helophila (d'Orbigny, 1835)
  8. Biomphalaria intermedia (Paraense & Deslandes, 1962)[9]
  9. Biomphalaria kuhniana (Clessin, 1883)
  10. † Biomphalaria manya (Cabrera & Martinez, 2018)[10]
  11. Biomphalaria obstructa (Morelet, 1849)
  12. Biomphalaria occidentalis (Paraense, 1981)[9]
  13. Biomphalaria oligoza (Paraense, 1974)[9]
  14. Biomphalaria orbignyi (Paraense, 1975)[9]
  15. Biomphalaria peregrina (d'Orbigny, 1835)[9]
  16. Biomphalaria prona (E. von Martens, 1873)
  17. Biomphalaria schrammi (Crosse, 1864)
  18. Biomphalaria straminea (Dunker, 1848)[9]
  19. Biomphalaria subprona (Martens, 1899)[11]
  20. Biomphalaria temascalensis (Rangel-Ruiz, 1987)
  21. Biomphalaria tenagophila (d'Orbigny, 1835)[9]

Old World (Africa, Madagascar and the Middle East) species include:

Confirmed species using molecular identification methods:

  1. Biomphalaria alexandrina (Ehrenberg, 1831)
  2. Biomphalaria angulosa (Mandahl-Barth, 1957)
  3. Biomphalaria camerunensis (Mandahl-Barth, 1957)
  4. Biomphalaria choanomphala (E. von Martens, 1879)
  5. Biomphalaria pfeifferi (Krauss, 1848)
  6. Biomphalaria smithi (Preston, 1910) - type species
  7. Biomphalaria stanleyi (Smith, 1888)
  8. Biomphalaria sudanica (Martens, 1870)

There is one known hybrid Biomphalaria glabrata × Biomphalaria alexandrina from Egypt.[12]

Suspected species identified using morphological methods:

  1. Biomphalaria arabica (Melvill & Ponsonby, 1896)
  2. Biomphalaria barthi (Brown, 1973)
  3. Biomphalaria rhodesiensis (Mandahl-Barth, 1957)
  4. Biomphalaria ruppellii (Dunker, 1848) - subspecies: B. ruppellii ruppellii; B. ruppellii katangae Haas[13]
  5. Biomphalaria salinarum (Morelet, 1868)
  6. Biomphalaria tchadiensis (Germain, 1904)

Phylogeny

A cladogram created from mitochondrial and nuclear DNA showing the phylogenic relationships of both New World (16) and Old World (7) species:[14]

Biomphalaria

The topology was consistent with the proposed Neotropical origins of the genus, with the oldest Biomphalaria fossils being dated from approximately 60 million years ago.[15] However, further analysis of the African Biomphalaria species found only B. camerunensis and B. pfeifferi were the only definitive African species, with the remain species being apart of (or a sister taxa to) the "Nilotic species complex":[16]

African Biomphalaria phylogenetic tree.png


All of the African Biomphalaria species have low levels of genetic diversity[17][18] , which is likely the result of their relatively recent evolutionary history.






Distribution

The origin of the genus Biomphalaria is American.[14] The ancestor of Biomphalaria glabrata colonized Africa 2.3–4.5[14] or 2-5[19] millions years ago and speciated into all the African Biomphalaria species.[14]

Natural populations of these snails are usually found in tropical standing water or freshwater in South America and Africa, but they also reach 30° latitude in subtropical areas. Many species of these red-blooded planorbid snails (Gastropoda: Basommatophora) are able to survive a long time when removed from their freshwater habitat. Of the 34 Biomphalaria species, 4 (Biomphalaria glabrata, Biomphalaria pfeifferi, Biomphalaria straminea, and Biomphalaria tenagophila) have recently expanded their native ranges. They have been introduced to areas where other Biomphalaria species are endemic (e.g., Congo and Egypt) or to subtropical zones that have no frost period (Texas, Louisiana, Florida, Hong Kong).[6]

All species in the genus Biomphalaria except of native Biomphalaria obstructa has not yet become established in the US, but they are considered to represent a potentially serious threat as a pest, an invasive species which could negatively affect agriculture, natural ecosystems, human health or commerce. Therefore, it has been suggested that this species be given top national quarantine significance in the USA.[20]

Parasites

This genus of snails is medically important, because the snails can carry a parasite of humans which represents a serious disease risk: the snails serve as an intermediate host (vector) for the human parasitic blood fluke, Schistosoma mansoni, that infects about 83 million people.[21]

The human disease schistosomiasis (aka snail fever) caused by all Schistosoma species (transmitted also by other snails) infects 200 million people.[22] The fluke, which is found primarily in tropical areas, infects mammals (including humans) via contact with water that contains schistosome larvae (cercariae) which have previously been released from the snail. Infection occurs via penetration of cercariae through the skin.[23]

Eighteen species of Biomphalaria are intermediate hosts for Schistosoma mansoni; seven species of the genus have not been tested for this susceptibility and nine species are resistant.[24] Altogether about 30 species of parasites from Africa and at least 20 species from the Neotropics are known to parasitize Biomphalaria.[24]

References

This article incorporates public domain text from the Majoros et al. reference.[2]

  1. ^ Preston H. B. (1910) "Addition to the non-Marine Molluscan Fauna of British and German East Africa and Lake Albert Edward". The Annals and Magazine of Natural History including zoology, botany, and geology 6(8 series, 35): 526-. 535, plate IX figure 26, 26A.
  2. ^ a b Majoros, G. B.; Fehér, Z.; Deli, T.; Földvári, G. (2008). "Establishment of Biomphalaria tenagophila Snails in Europe". Emerging Infectious Diseases. 14 (11): 1812–1814. doi:10.3201/eid1411.080479. PMC 2630743. PMID 18976582.
  3. ^ a b "WoRMS - World Register of Marine Species - Biomphalaria Preston, 1910". www.marinespecies.org. Retrieved 2 April 2023.
  4. ^ Preston, H.B. (November 1910). "LX.—Additions to the non-Marine molluscan fauna of British and German East Africa and Lake Abert Edward". Annals and Magazine of Natural History. 6 (35): 526–536. doi:10.1080/00222931008692885. ISSN 0374-5481.
  5. ^ Bouchet P.; Rocroi J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2): 167–168.
  6. ^ a b Majoros, G. B.; Fehér, Z.; Deli, T.; Földvári, G. (2008). "Establishment of Biomphalaria tenagophila Snails in Europe". Emerging Infectious Diseases. 14 (11): 1812–1814. doi:10.3201/eid1411.080479. PMC 2630743. PMID 18976582.
  7. ^ Teodoro, T. M.; Janotti-Passos, L. K.; Carvalho, O. D. S.; Caldeira, R. L. (2010). "Occurrence of Biomphalaria cousini (Mollusca: Gastropoda) in Brazil and its susceptibility to Schistosoma mansoni (Platyhelminths: Trematoda)". Molecular Phylogenetics and Evolution. 57 (1): 144–151. doi:10.1016/j.ympev.2010.05.019. PMID 20580934.
  8. ^ Estrada, V. E.; Velásquez, L. E.; Caldeira, R. L.; Bejarano, E. E.; Rojas, W.; Carvalho, O. S. (2006). "Phylogenetics of South American Biomphalaria and description of a new species (Gastropoda: Planorbidae)". Journal of Molluscan Studies. 72 (3): 221–228. doi:10.1093/mollus/eyl003.
  9. ^ a b c d e f g Rumi A., Gregoric D. E. G., Núñez V. & Darrigran G. A. (2008). "Malacología Latinoamericana. Moluscos de agua dulce de Argentina". Revista de Biología Tropical 56(1): 77–111. HTM.
  10. ^ Cabrera & Martinez (2018). "A new species of Biomphalaria Preston, 1910, Gastropoda Planorbidae, from the Upper Cretaceous of Uruguay". Revista Brasileira de Paleontologia.
  11. ^ Paraense, W Lobato (1996). "Biomphalaria subprona (Martens, 1899) (Gastropoda: Planorbidae)". Memórias do Instituto Oswaldo Cruz. 91 (2): 187–190. doi:10.1590/S0074-02761996000200011. PMID 8736087.
  12. ^ Yousif, F.; Ibrahim, A.; Abdel Kader, A.; El-Bardicy, S. (1998). "Invasion of the Nile Valley in Egypt by a hybrid of Biomphalaria glabrata and Biomphalaria alexandrina, snail vectors of Schistosoma mansoni". Journal of the Egyptian Society of Parasitology. 28 (2): 569–582. PMID 9707685.
  13. ^ Brown, David S (26 May 1994). Freshwater Snails Of Africa And Their Medical Importance. CRC Press. ISBN 978-1-4822-9518-4.
  14. ^ a b c d DeJong, Randall J.; Morgan, Jess A. T.; Paraense, W. Lobato; Pointier, Jean-Pierre; Amarista, Manuel; Ayeh-Kumi, Patrick F. K.; Babiker, Ahmed; Barbosa, Constança S.; Brémond, Philippe; Pedro Canese, Andrés; de Souza, Cecilia Pereira; Dominguez, Claudio; File, Sharon; Gutierrez, Alfredo; Incani, R. Nino (1 December 2001). "Evolutionary Relationships and Biogeography of Biomphalaria (Gastropoda: Planorbidae) with Implications Regarding Its Role as Host of the Human Bloodfluke, Schistosoma mansoni". Molecular Biology and Evolution. 18 (12): 2225–2239. doi:10.1093/oxfordjournals.molbev.a003769. ISSN 1537-1719.
  15. ^ Jarne, Philippe; Pointier, Jena-Pierre; David, Patrice (2011), Toledo, Rafael; Fried, Bernard (eds.), "Biosystematics of Biomphalaria spp. with an Emphasis on Biomphalaria glabrata", Biomphalaria Snails and Larval Trematodes, New York, NY: Springer, pp. 1–32, doi:10.1007/978-1-4419-7028-2_1, ISBN 978-1-4419-7028-2, retrieved 2 April 2023
  16. ^ Jørgensen, Aslak; Kristensen, Thomas K.; Stothard, J. Russell (October 2007). "Phylogeny and biogeography of African Biomphalaria (Gastropoda: Planorbidae), with emphasis on endemic species of the great East African lakes". Zoological Journal of the Linnean Society. 151 (2): 337–349. doi:10.1111/j.1096-3642.2007.00330.x. ISSN 1096-3642.
  17. ^ Morgan, Jess A. T; DeJong, Randall J; Jung, Younghun; Khallaayoune, Khalid; Kock, Sonja; Mkoji, Gerald M; Loker, Eric S (1 December 2002). "A phylogeny of planorbid snails, with implications for the evolution of Schistosoma parasites". Molecular Phylogenetics and Evolution. 25 (3): 477–488. doi:10.1016/S1055-7903(02)00280-4. ISSN 1055-7903.
  18. ^ Van Damme, Dirk; Van Bocxlaer, Bert (2009), Dumont, Henri J. (ed.), "Freshwater Molluscs of the Nile Basin, Past and Present", The Nile: Origin, Environments, Limnology and Human Use, Dordrecht: Springer Netherlands, pp. 585–629, doi:10.1007/978-1-4020-9726-3_29, ISBN 978-1-4020-9726-3, retrieved 2 April 2023
  19. ^ Morgan, J. A. T.; Dejong, R. J.; Snyder, S. D.; Mkoji, G. M.; Loker, E. S. (2003). "Schistosoma mansoni and Biomphalaria: Past history and future trends". Parasitology. 123 (7): S211–28. doi:10.1017/S0031182001007703. PMID 11769285. S2CID 23030603./
  20. ^ Cowie R. H., Dillon R. T., Robinson D. G. & Smith J. W. (2009). "Alien non-marine snails and slugs of priority quarantine importance in the United States: A preliminary risk assessment". American Malacological Bulletin 27: 113-132. PDF Archived 16 June 2016 at the Wayback Machine.
  21. ^ Crompton, D. W. (1999). "How much human helminthiasis is there in the world?" (PDF). The Journal of Parasitology. 85 (3): 397–403. doi:10.2307/3285768. JSTOR 3285768. PMID 10386428. Archived from the original (PDF) on 23 February 2010.
  22. ^ The Carter Center "Schistosomiasis Control Program". Accessed 20 November 2009.
  23. ^ Colley, Daniel G; Bustinduy, Amaya L; Secor, W Evan; King, Charles H (June 2014). "Human schistosomiasis". The Lancet. 383 (9936): 2253–2264. doi:10.1016/s0140-6736(13)61949-2. ISSN 0140-6736.
  24. ^ a b Dejong, R. J.; Morgan, J. A.; Paraense, W. L.; Pointier, J. P.; Amarista, M.; Ayeh-Kumi, P. F.; Babiker, A.; Barbosa, C. S.; Brémond, P.; Pedro Canese, A.; De Souza, C. P.; Dominguez, C.; File, S.; Gutierrez, A.; Incani, R. N.; Kawano, T.; Kazibwe, F.; Kpikpi, J.; Lwambo, N. J.; Mimpfoundi, R.; Njiokou, F.; Noël Poda, J.; Sene, M.; Velásquez, L. E.; Yong, M.; Adema, C. M.; Hofkin, B. V.; Mkoji, G. M.; Loker, E. S. (2001). "Evolutionary relationships and biogeography of Biomphalaria (Gastropoda: Planorbidae) with implications regarding its role as host of the human bloodfluke, Schistosoma mansoni". Molecular Biology and Evolution. 18 (12): 2225–2239. doi:10.1093/oxfordjournals.molbev.a003769. PMID 11719572., text.

Further reading

External link

Media related to Biomphalaria at Wikimedia Commons

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