The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Pomacea cf. canaliculata/maculata
Pomacea cf. canaliculata/maculata
(an applesnail)
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Pomacea cf. canaliculata/maculata

Common name: an applesnail

Taxonomy: available through www.itis.govITIS logo

Native Range:
US auto-generated map Legend USGS Logo
Alaska auto-generated map
Hawaii auto-generated map
Caribbean auto-generated map
Puerto Rico &
Virgin Islands
Guam auto-generated map
Guam Saipan
Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Pomacea cf. canaliculata/maculata are found here.

StateYear of earliest observationYear of last observationTotal HUCs with observations†HUCs with observations†
Alabama200320192Escatawpa; Mobile-Tensaw
Arizona200720183Lower Gila; Lower Salt; Lower Verde
California199720185Middle Kern-Upper Tehachapi-Grapevine; Middle San Joaquin-Lower Chowchilla; Salton Sea; San Diego; San Joaquin Delta
Florida1978201936Alafia; Apalachee Bay-St. Marks; Big Cypress Swamp; Blackwater; Caloosahatchee; Cape Canaveral; Charlotte Harbor; Chipola; Crystal-Pithlachascotee; Daytona-St. Augustine; Everglades; Florida Southeast Coast; Hillsborough; Kissimmee; Lake Okeechobee; Little Manatee; Lower Ochlockonee; Lower St. Johns; Manatee; Myakka; Northern Okeechobee Inflow; Ochlockonee; Oklawaha; Peace; Pensacola Bay; Santa Fe; Sarasota Bay; St. Andrew-St. Joseph Bays; St. Marys; Tampa Bay; Upper St. Johns; Upper Suwannee; Vero Beach; Western Okeechobee Inflow; Withlacoochee; Withlacoochee
Georgia200520167Cumberland-St. Simons; Lower Flint; Lower Savannah; Satilla; St. Marys; Upper Ochlockonee; Withlacoochee
Hawaii198920196Hawaii; Hawaii Region; Kauai; Lanai; Maui; Oahu
Idaho199120161Upper Snake-Rock
Louisiana2006201914Amite; Atchafalaya; Bayou Teche; Calcasieu-Mermentau; East Central Louisiana Coastal; Eastern Louisiana Coastal; Lake Maurepas; Liberty Bayou-Tchefuncta; Lower Calcasieu; Lower Grand; Lower Pearl; Mermentau; Vermilion; West Central Louisiana Coastal
Mississippi200820143Lower Pearl; Mississippi Coastal; Pascagoula
North Carolina199219921Upper Dan
Puerto Rico200620092Eastern Puerto Rico; Southern Puerto Rico
South Carolina200820184Bulls Bay; Cooper; Middle Savannah; Waccamaw
Texas200020199Austin-Oyster; Buffalo-San Jacinto; Lower Angelina; Lower Brazos; Lower Trinity; Lower West Fork Trinity; South Laguna Madre; Spring; West Galveston Bay

Table last updated 10/12/2019

† Populations may not be currently present.

Revision Date: 5/21/2019

Citation Information:
U.S. Geological Survey, 2019, Pomacea cf. canaliculata/maculata: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=986, Revision Date: 5/21/2019, Access Date: 10/18/2019

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2019]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [10/18/2019].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. For queries involving fish, please contact Matthew Neilson. For queries involving invertebrates, contact Amy Benson.