Species Account for Unio tumidus
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Unio tumidus Retzius, 1788
Swollen River Mussel
Mollusca: Unionidae
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Taxonomic group: molluscs (Mollusca) - County data
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Essex RDB: Listed
Records: 2
First Record: 2004
Latest Record: 2018
1992-on hectads: 2
Pre-1992 hectads: 0
Total hectads: 2
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Declined in Essex, and in some areas nationally
Habitats
no broad habitat data available
no subhabitat data available
no structural habitat data available
Habitat Detail and Method (based on 2 records with habitat detail and method information)
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