Oncomelania

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Oncomelania
Oncomelania hupensis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Pomatiopsidae
Subfamily: Pomatiopsinae
Genus: Oncomelania
Gredler, 1881[1]
Diversity[2]
2 species

Oncomelania is a

mollusks in the family Pomatiopsidae
.

These Oncomelania snails are distantly related to the marine

marine snails of the family Rissoidae
.

Species

Oncomelania minima

There are two[2] species in the genus Oncomelania:

Woodruff et al. (1999) recognized also the following species:

Japanese Red List Data Book (2006) recognizes also the following additional species:

Distribution

This genus has not yet become established in the USA, but it is 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.[7]

Evolution

About the origin and evolution history of Oncomelania, Davis (1979)

Indian Craton after break-up of Gondwanan and colonization of South-East Asia and China. It is hypothesized that Oncomelania snails, arrived in southwestern China from Indian before the second (major) Tibetan orogeny (2.5 Ma), then evolved and spread down their respective river systems, to mainland of China, Indonesia and Philippines. Although mutation rate calibrations using fossil data is impossible here, many studies have demonstrated the confidence that molecular data can provide reasonable estimates of divergence time.[8] Data by Zhao et al. (2010)[8] suggested that the two subspecies of Oncomelania hupensis began to diverse as early about 2–6 Ma based on the invertebrate ITS substitution rate range. Zhao et al. (2010)[8] did not find any strong molecular and fossil evidences about Oncomelania evolution, but the reported Oncomelania fossil found in Guangxi (1 Ma) by Nils Hjalmar Odhner in 1930 and geological movement make this diversification time reasonable. It provides a new insight into the Oncomelania evolution history although the substitution rate needs to be verified with new fossil and molecular data in future study.[8]

Parasites

Various Oncomelania species are significant medically, because they can serve as

parasite, and the paragonimus
lung fluke parasites.

The

cercariae.[9]

References

This article incorporates

CC-BY-2.0 text from the reference[9] and CC-BY-2.5 text from the reference[8]

  1. ^ Gredler V. M. (1881). Jahrb. dtsch. malak. Ges. 8: 120.
  2. ^
    doi:10.1186/1471-2148-11-118
    .
  3. ^
    ISBN 978-1-4223-1926-0. at Google Books
    .
  4. doi:10.1093/mollus/65.1.21
    .
  5. ^ (in Japanese) "ヨナクニカタヤマガイ" Archived 2011-10-04 at the Wayback Machine. 日本のレッドデータ検索システム [Japanese Red List Data Book], accessed 17 July 2011.
  6. ^ (in Japanese) "サクヤマカワツボ" Archived 2011-10-04 at the Wayback Machine. 日本のレッドデータ検索システム [Japanese Red List Data Book], accessed 17 July 2011.
  7. ^ 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 2016-06-16 at the Wayback Machine.
  8. ^
    doi:10.1371/journal.pntd.0000611
    .
  9. ^
    doi:10.1371/journal.pmed.0050018
    .
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