| Page last updatedSun 07 Sep 2025
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  | The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win! This page documents data for Conrad (1838), such as genera and species attributed to that publication (including known misspellings, misidentifications, and other unavailable names) as well as taxonomic opinions, if available. Taxonomic opinions refer to uses of genera and species as valid and invalid in that work. The MUSSEL Project Database has moved to a new server, with a new URL! The new address for this page is: https://musselpdb.org/db.php?ty=publ&id=1366 Search the database pages:
 
 |  | Publication information Conrad, T.A. 1838. Monography of the Family Unionidae, or naiades of Lamarck, (fresh water bivalve shells) or North America, illustrated by figures drawn on stone from nature 1(10): 81-94, pls. 46-51. Click here for online access. Attributed Species Names
  | Unio stramineus Conrad, 1834
    Conrad, 1834, Amer. J. Sci. 25(2): 339, pl. 1, fig. 6.
 Conrad, 1834, New Fresh-Water Shells: pl. 7, fig. 1.
 Conrad, 1838, Monogr. Fam. Unionidae 1(10): 91, pl. 50, fig. 1.
 Conrad, 1853, Proc. Acad. Nat. Sci. 6: 258.
 |  | Unio stegarius Say, 1834
   ‘Rafinesque’  of Authors.
 Say, 1834, Amer. Conch. 6: ??.
 Ferussac, 1835, Mag. Zool. 5: 28.
 Conrad, 1838, Monogr. Fam. Unionidae 1(10): 83, pl. 46, fig. 1.
 Reeve, 1864, Conch. Icon. 16: pl. 12, sp. 45.
 (reference to Obovaria stegaria Rafinesque, 1820)
 |  | Unio interruptus Conrad, 1834
   ‘Rafinesque’  of Authors.
 Conrad, 1834, New Fresh-Water Shells: 69.
 Say, 1834, Amer. Conch. 6: ??.
 Ferussac, 1835, Mag. Zool. 5: 28.
 Conrad, 1838, Monogr. Fam. Unionidae 1(10): 88, pl. 48.
 Reeve, 1864, Conch. Icon. 16: pl. 14, sp. 56.
 (misidentified reference to Obliquaria (Plagiola) interrupta Rafinesque, 1820)
 |  | Unio bullatus Conrad, 1838
  ‘Rafinesque’  of Authors.
 Conrad, 1838, Monogr. Fam. Unionidae 1(10): 82, pl. 45, fig. 2.
 Lapham, 1852, Trans. WI Agri. Soc. 2: 369.
 Reeve, 1864, Conch. Icon. 16: pl. 12, sp. 43.
 (reference to Obliquaria (Quadrula) bullata Rafinesque, 1820)
 |  | Unio patulus Conrad, 1838
    ‘Lea’ Conrad, 1838, Monogr. Fam. Unionidae 1(10): 92, pl. 50, fig. 2.
 (misidentified reference to Unio patulus Lea, 1829)
 |  | Unio plexus Conrad, 1838
  Conrad, 1838, Monogr. Fam. Unionidae 1(10): 89, pl. 49, figs. 1-2.
 Conrad, 1853, Proc. Acad. Nat. Sci. 6: 255.
 Type(s): LECTOTYPE ANSP_129923, Vera Cruz, Mexico.
 |  | Unio hembeli Conrad, 1838
    Conrad, 1838, Monogr. Fam. Unionidae 1(10): 93, pl. 51.
 Type(s): HOLOTYPE ANSP_56529, no locality, but sent from New Orleans, Louisiana.
 |  | Unio lienosus variety constrictus Conrad, 1838
  Conrad, 1838, Monogr. Fam. Unionidae 1(10): 91, pl. 49, fig. 4.
 Conrad, 1838, Monogr. Fam. Unionidae 2(11): back cover correginda [as ‘Unio constrictus’].
 Conrad, 1853, Proc. Acad. Nat. Sci. 6: 247 [as ‘Unio constrictus’].
 (intro'd as intra-sp. of Unio lienosus Conrad, 1834)
 Type(s): HOLOTYPE ANSP_56465A, North River, Rockbridge Co., Va.
 |  | Unio conradius Conrad, 1838
    ‘Lea’ Conrad, 1838, Monogr. Fam. Unionidae 1(10): 87, pl. 47, fig. 3.
 (error for Unio conradicus Lea, 1834)
 |  Taxonomic Opinions| 
	 Unio acutissimus Lea, 1831
	 Unio bullatus (Rafinesque, 1820)
	+ Unio verrucosus albus Hildreth, 1828
 + Unio pustulosus Lea, 1831
 Unio conradius [sic] Lea, 1834
	 Unio constrictus Conrad, 1838
	 Unio dromas Lea, 1834
	 Unio hembeli Conrad, 1838
	 Unio heterodon Lea, 1829
	 Unio interrupta (Rafinesque, 1820)
	+ Unio brevidens Lea, 1831
 Unio patulus Lea, 1829
	 Unio plexus Conrad, 1838
	 Unio stegarius (Rafinesque, 1820)
	+ Unio irroratus Lea, 1828
 + Unio stegarius Say, 1834
 Unio stramineus Conrad, 1834
	 Unio subtentus Say, 1825
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 |  | Page updated: 08:40:59 Sun 07 Sep 2025 |  |