Pomacea diffusa
| Pomacea diffusa | |
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| Pomacea diffusa shell | |
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| Species: | P. diffusa
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| Pomacea diffusa Blume, 1957
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Pomacea diffusa, common name the spike-topped apple snail, is a species of freshwater snail, an aquatic gastropod mollusk in the family Ampullariidae, the apple snails.
Taxonomy
Pomacea diffusa was originally described as a subspecies of Pomacea bridgesii.[1] Pain (1960)[2] argued that Pomacea bridgesii bridgesii was a larger form with a restricted range, with the smaller Pomacea bridgesii diffusa being the common form throughout the Amazon Basin (Brazil, Peru, Bolivia).[1] Cowie and Thiengo (2003)[3] suggested that the latter might deserve full species status, and the two taxa have been confirmed as distinct species by genetic analyses.[1]
Distribution
The type locality of Pomacea diffusa is in the city of Santa Cruz de la Sierra, Bolivia, although the species is widespread throughout the Amazon Basin.[1]
Non-indigenous distribution of Pomacea diffusa include:
- Thompson[4] recorded this species (as Pomacea bridgesii) in Florida in Monroe, Miami-Dade, Broward, Palm Beach, and Pinellas Counties.[1] The FLMNH electronic database also lists samples from Alachua County, but records cited from the FLMNH database for Brevard County are in fact from Broward County.[1] Rawlings et al. (2007)[1] also collected this species in Hillsborough and Collier Counties.
- Pomacea diffusa was first recorded in Florida (as Pomacea bridgesii) by William J. Clench.[1][5] The FLMNH has specimens collected in Palm Beach County in 1967 (FLMNH 20295) and Miami-Dade and Broward Counties in the early 1970s (FLMNH 22175, 222247).[1] Howells et al. (2006)[6] reported its establishment in Mobile, Alabama in 2003.[1]
- Cuba[7]
Description
Pomacea diffusa is known as the spike-topped apple snail, because of its relatively raised spire.[1] It lacks a channeled suture, and overlaps in size with the Pomacea paludosa.[1]
The egg masses have an irregular honeycombed appearance, like those of Pomacea haustrum, but are smaller and have a tan to salmon color, although the egg masses are white when freshly laid.[1]
References
This article incorporates CC-BY-2.0 text from the reference.[1]
- ^ a b c d e f g h i j k l m n Rawlings T. A., Hayes K. A., Cowie R. H. & Collins T. M. (2007). "The identity, distribution, and impacts on non-native apple snails in the continental United States". BMC Evolutionary Biology 7: 97 doi:10.1186/1471-2148-7-97.
- ^ Pain T. (1960). "Pomacea (Ampullariidae) of the Amazon River system". Journal of Conchology 24: 421-432.
- ^ Cowie R. H & Thiengo S. C. (2003). "The apple snails of the Americas (Mollusca: Gastropoda: Ampullariidae: Asolene, Felipponea, Marisa, Pomacea, Pomella): a nomenclatural and type catalog". Malacologia 45: 41-100.
- ^ Thompson F. G. (1984). Freshwater snails of Florida: A manual for identification. Gainesville: University of Florida Press.
- ^ Clench W. J. (1966). "Pomacea bridgesi (Reeve) in Florida". Nautilus 79: 105.
- ^ Howells R. G., Burlakova L. F., Karatayev A. Y., Marfurt R. K. & Burks R. L. (2006). "Native and introduced Ampullariidae in North America: History, status, and ecology. In Global Advances in the Ecology and Management of Golden Apple Snails". In: Joshi R. C., Sebastian L. S., Muñoz N. E. (2006). Philippine Rice Research Institute. 2006: 73-112.
- ^ Vázquez A. A. & Perera S. (2010). "Endemic Freshwater molluscs of Cuba and their conservation status". Tropical Conservation Science 3(2): 190-199. HTM, PDF.
External links
- Applesnails of Florida on the UF / IFAS Featured Creatures Web site
- [1] [The apple snail website species page]