Arca dariensis A. P. Brown & Pilsbry, 1911 † accepted as Scapharca (Scapharca) dariensis A. P. Brown & Pilsbry, 1911 † (original description)
Cancellaria decaptyx A. P. Brown & Pilsbry, 1911 † accepted as Narona decaptyx (A. P. Brown & Pilsbry, 1911) † (original description)
Cardium (Trachycardium) stiriatum A. P. Brown & Pilsbry, 1911 † accepted as Phlogocardia stiriata (A. P. Brown & Pilsbry, 1911) † (original description)
Conus aemulator A. P. Brown & Pilsbry, 1911 † (original description)
Conus gaza C. W. Johnson & Pilsbry, 1911 † accepted as Conus multiliratus Böse, 1906 † (original description)
Glycymeris canalis A. P. Brown & Pilsbry, 1911 † (original description)
Leda balboae A. P. Brown & Pilsbry, 1911 † accepted as Saccella peruviana (Dall, 1898) † (original description)
Murex (Phyllonotus) gatunensis A. P. Brown & Pilsbry, 1911 † accepted as Calotrophon gatunensis (A. P. Brown & Pilsbry, 1911) (original description)
Murex polynematicus A. P. Brown & Pilsbry, 1911 † accepted as Vokesimurex polynematicus (A. P. Brown & Pilsbry, 1911) † (original description)
Pecten (Aequipecten) effossus A. P. Brown & Pilsbry, 1911 † accepted as Lepidopecten scissuratus (Dall, 1898) † (original description)
Pecten (Amusium) toulae A. P. Brown & Pilsbry, 1911 † accepted as Amusium toulae (A. P. Brown & Pilsbry, 1911) † (original description)
Terebra gausapata A. P. Brown & Pilsbry, 1911 † (original description)
Turritella altilira Conrad, 1857 † (additional source)
Turritella sapotensis A. P. Brown & Pilsbry, 1911 † (original description)

Costa Rica for Turritella sapotensis A. P. Brown & Pilsbry, 1911 † 
Panama for Cancellaria decaptyx A. P. Brown & Pilsbry, 1911 † 
Panama for Murex polynematicus A. P. Brown & Pilsbry, 1911 † 
Panama for Pecten (Aequipecten) effossus A. P. Brown & Pilsbry, 1911 † 
Panama for Pecten (Amusium) toulae A. P. Brown & Pilsbry, 1911 †