Specimen Information

Pyganodon grandis
Pyganodon grandis
(giant floater)
Mollusks-Bivalves
Native Transplant

Specimen ID1757702
GroupMollusks-Bivalves
GenusPyganodon
Speciesgrandis
Common Namegiant floater
StateTX
CountyHidalgo
LocalityCanals from Rio Grande
Mapping AccuracyAccurate
HUC8 NameLower Rio Grande
HUC8 Number13090002
HUC10 NameLake Tropicana-Rio Grande
HUC10 Number1309000203
HUC12 NameBentsen Rio Grande Valley State Park-Rio Grande
HUC12 Number130900020305
Map
Collection Year1931
Year AccuracyEstimated
Reference 1
Ref. Number:44851
Author:Johnson, R.I.
Date:1999
Title:Unionidae of the Rio Grande (Rio Bravo Del Norte) system of Texas and Mexico
Journal:Occasional Papers on Mollusks
Volume:6
Issue:77
Pages:1-67
Commentsfalls in updated native range
Record TypeLiterature


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Citation information: U.S. Geological Survey. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [4/11/2025].

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