Morrison, J.P.E. 1943. Two new Orinoco unionids, with notes on Unio granadensis Lea and U. patulus Lea. Nautilus 57: 14-16 . Available electronically.

Morrison, 1943. Nautilus 57: 14, pl. 5, fig. 5-9.
Type(s): HOLOTYPE USNM_521998, above Munduapo, Venezuela.
‘Conrad’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 598.
Simpson, 1914. Descr. Cat. Naiades: 289 [corrected in corrigenda].
Morrison, 1943. Nautilus 57: 15.
(error for Unio grandensis Conrad, 1855)
Morrison, 1943. Nautilus 57: 15.
(new name for Unio granadensis Lea, 1868)

Morrison, 1943. Nautilus 57: 14, pl. 5, figs. 1-4.
Type(s): HOLOTYPE USNM_522000, Maipures, Orinoco R., Colombia.