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Data last updated
Mon 1 Dec 2025
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Publication Conrad (1840): summarypublication summary
Full CitationConrad, T.A. 1840. Monography of the Family Unionidae, or naiades of Lamarck, (fresh water bivalve shells) or North America, illustrated by figures drawn on stone from nature 2(13): 111-118, pls. 61-65. Available electronically.
Attributed Nominal Species
‘Say’ Conrad, 1834. New Fresh-Water Shells: ??.
‘Say’ Conrad, 1840. Monogr. Fam. Unionidae 2(13): 115, pl. 64.
(misidentified reference to Unio cicatricosus Say, 1829)
‘Rafinesque’ of Authors.
Say, 1834. Amer. Conch. 6: pl. 53.
Conrad, 1840. Monogr. Fam. Unionidae 2(13): 112, pl. 62.
(reference to Obliquaria (Quadrula) quadrula Rafinesque, 1820)
Taxonomic OpinionsUnio cardium (Rafinesque, 1820) = Lampsilis cardium
+ Unio ventricosus Barnes, 1823
+ Unio occidens Lea, 1829 Unio cicatricosus Say, 1829 = Plethobasus cicatricosus
+ Unio varicosus Lea, 1831 Unio cyphius [sic] (Rafinesque, 1820) = Plethobasus cyphyus
+ Unio aesopus Green, 1827 Unio plicata Say, 1819 = Amblema plicata
+ Unio rariplicata Lamarck, 1819 Unio quadrulus (Rafinesque, 1820) = Quadrula quadrula
+ Unio quadrulus Say, 1834
+ Unio rugosus Barnes, 1823
+ Unio lacrymosus Lea, 1828
+ Unio asperrimus Lea, 1831 Unio tetralasmus Say, 1831 = Uniomerus tetralasmus
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