Pomacea diffusa

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Pomacea diffusa
Pomacea diffusa 01.JPG
Pomacea diffusa 02.JPG
Pomacea diffusa shell
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda

informal group Architaenioglossa

Superfamily: Ampullarioidea
Family: Ampullariidae
Subfamily: Ampullariinae
Tribe: Ampullariini
Genus: Pomacea
Species: P. diffusa
Binomial name
Pomacea diffusa
Blume, 1957

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.


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]


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:


Two views of a shell of Pomacea diffusa

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]

An egg cluster of Pomacea diffusa

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]


This article incorporates CC-BY-2.0 text from the reference.[1]

  1. ^ a b c d e f g h i j k l m n Rawlings, Timothy A.; Hayes, Kenneth A.; Cowie, Robert H.; Collins, Timothy M. (2007). "The identity, distribution, and impacts of non-native apple snails in the continental United States". BMC Evolutionary Biology. 7: 97. doi:10.1186/1471-2148-7-97. ISSN 1471-2148. PMC 1919357Freely accessible. PMID 17594487. 
  2. ^ Pain, T. (1960). "Pomacea (Ampullariidae) of the Amazon River system". Journal of Conchology. 24: 421–443. 
  3. ^ 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. 
  4. ^ Thompson, F. G. (1984). Freshwater snails of Florida: A manual for identification. Gainesville: University of Florida Press. 
  5. ^ Clench, W. J. (1966). "Pomacea bridgesi (Reeve) in Florida". Nautilus. 79: 105. 
  6. ^ 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.
  7. ^ Perera, Antonio Alejandro Vázquez; Valderrama, Susana Perera (2010). "Endemic Freshwater Molluscs of Cuba and Their Conservation Status". Tropical Conservation Science. 3 (2): 190–199. doi:10.1177/194008291000300206. 

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