Arca dichotoma M. Hörnes, 1864 † (original description)
Arca hungarica M. Hörnes, 1864 † accepted as Limopsis anomala (Eichwald, 1830) † (original description)
Arca papillifera M. Hörnes, 1864 † (original description)
Arca pisum M. Hörnes, 1864 † (original description)
Arca rollei M. Hörnes, 1864 † accepted as Hoernesarca rollei (M. Hörnes, 1864) † (original description)
Cardilia deshayesi M. Hörnes, 1859 † (original description)
Cardita auingeri M. Hörnes, 1864 † accepted as Carditamera auingeri (M. Hörnes, 1864) † (original description)
Cardita schwabenaui M. Hörnes, 1864 † (original description)
Cardita transylvanica M. Hörnes, 1864 † (original description)
Cardita zelebori M. Hörnes, 1864 † (original description)
Cardium arpadense M. Hörnes, 1861 † accepted as Lymnocardium arpadense (M. Hörnes, 1861) † (original description)
Cardium carnuntinum M. Hörnes, 1861 † accepted as Lymnocardium carnuntinum (M. Hörnes, 1861) † (original description)
Cardium conjungens M. Hörnes, 1861 † accepted as Lymnocardium conjungens (M. Hörnes, 1861) † (original description)
Cardium haueri M. Hörnes, 1861 † accepted as Lymnocardium haueri (M. Hörnes, 1861) † (original description)
Cardium hoernesianum M. Hörnes, 1861 † (original description)
Cardium hungaricum M. Hörnes, 1861 † accepted as Lymnocardium hungaricum (M. Hörnes, 1861) † (original description)
Cardium majeri M. Hörnes, 1861 † accepted as Arpadicardium majeri (M. Hörnes, 1861) † (original description)
Cardium michelottianum M. Hörnes, 1861 † (original description)
Cardium moeschanum M. Hörnes, 1861 † (original description)
Cardium petersi M. Hörnes, 1861 † accepted as Tauricardium petersi (M. Hörnes, 1861) † (original description)
Cardium riegeli M. Hörnes, 1861 † accepted as Lymnocardium riegeli (M. Hörnes, 1861) † (original description)
Cardium schmidti M. Hörnes, 1861 † accepted as Lymnocardium schmidti (M. Hörnes, 1861) † (original description)
Cardium turonicum M. Hörnes, 1861 † accepted as Acanthocardia turonica (M. Hörnes, 1861) † (original description)
Chama austriaca M. Hörnes, 1861 † (original description)
Circe eximia M. Hörnes, 1861 † accepted as Gafrarium eximium (M. Hörnes, 1861) † (original description)
Congeria czjzeki M. Hörnes, 1867 † accepted as Coelogonia czjzeki (M. Hörnes, 1867) † (original description)
Congeria rhomboidea M. Hörnes, 1867 † accepted as Rhombocongeria rhomboidea (M. Hörnes, 1867) † (original description)
Corbula basteroti M. Hörnes, 1859 † (original description)
Crassatella hardeggeri M. Hörnes, 1864 † (original description)
Crassatella moravica M. Hörnes, 1864 † (original description)
Cypricardia transilvanica Hörnes, 1870 † accepted as Coralliophaga transilvanica (Hörnes, 1870) † (original description)
Cytherea raulini M. Hörnes, 1861 † (original description)
Donax intermedia M. Hörnes, 1859 † accepted as Donax intermedius M. Hörnes, 1859 † (original description)
Ensis rollei M. Hörnes, 1859 † (original description)
Erycina austriaca M. Hörnes, 1864 † accepted as Spaniorinus austriacus (M. Hörnes, 1864) † (original description)
Erycina donaciformis M. Hörnes, 1864 † (original description)
Erycina letochai M. Hörnes, 1864 † accepted as Mioerycina letochai (M. Hörnes, 1864) † (original description)
Gastrochaena intermedia M. Hörnes, 1859 † (original description)
Leda reussi M. Hörnes, 1864 † (original description)
Lepton insignis M. Hörnes, 1864 † accepted as Pseudolepton insignis (M. Hörnes, 1864) † (original description)
Lithodomus avitensis M. Hörnes, 1867 † (original description)
Lucina haidingeri M. Hörnes, 1864 † (original description)
Mactra turonica M. Hörnes, 1859 † (original description)
Modiola brocchii M. Hörnes, 1867 † accepted as Modiolus brocchii M. Hörnes, 1867 † (original description)
Modiola condita M. Hörnes, 1867 † accepted as Musculus conditus (M. Hörnes, 1867) † (original description)
Modiola letochae M. Hörnes, 1867 † (original description)
Murex amberus de Gregorio, 1885 accepted as Hexaplex austriacus (Tournouër, 1875) † (additional source)
Murex trunculus f. galippus de Gregorio, 1885 † accepted as Hexaplex austriacus (Tournouër, 1875) † (additional source)
Mytilus (Septifer) superbus M. Hörnes, 1867 † (original description)
Mytilus fuscus M. Hörnes, 1867 † (original description)
Mytilus haidingeri M. Hörnes, 1867 † (original description)
Nucula mayeri M. Hörnes, 1864 † (original description)
Ostrea hoernesi Reuss, 1870 † (original description)
Pecten leythajanus M. Hörnes, 1867 † (original description)
Pecten reussi Hörnes, 1867 † accepted as Manupecten fasciculatus (Millet, 1866) † (original description)
Pecten rollei Hörnes, 1867 † accepted as Pecten hornensis Deperét & Roman, 1902 † (original description)
Pectunculus fichteli (Deshayes, 1850) † accepted as Glycymeris fichteli (Deshayes, 1850) † (basis of record)
Pectunculus obtusatus M. Hörnes, 1864 † (original description)
Perna radiata M. Hörnes, 1867 † accepted as Isognomon radiatus (M. Hörnes, 1867) † (original description)
Perna rollei M. Hörnes, 1867 † accepted as Isognomon rollei (M. Hörnes, 1867) † (original description)
Pholadomya rectidorsata M. Hörnes, 1859 † (original description)
Pleurodesma M. Hörnes, 1859 † (original description)
Pleurodesma mayeri M. Hörnes, 1859 † (original description)
Saxicava dubiosa M. Hörnes, 1859 † accepted as Rzehakia dubiosa (M. Hörnes, 1859) † (original description)
Tapes basteroti M. Hörnes, 1859 † (original description)
Tapes vetula (Basterot, 1825) † accepted as Polititapes vetulus (Basterot, 1825) † (basis of record)
Tellina schoenni M. Hörnes, 1859 † (original description)
Tellina strohmayeri M. Hörnes, 1859 † (original description)
Unio atavus M. Hörnes, 1864 † (original description)
Unio moldaviensis M. Hörnes, 1864 † accepted as Rugunio moldaviensis (M. Hörnes, 1864) † (original description)
Unio moravicus M. Hörnes, 1864 † (original description)
Unio oriovacensis M. Hörnes, 1864 † accepted as Cuneopsidea oriovacensis (M. Hörnes, 1864) † (original description)
Unio slavonicus M. Hörnes, 1864 † accepted as Potomida slavonica (M. Hörnes, 1864) † (original description)
Unio sturi M. Hörnes, 1864 † accepted as Bogatschevia sturi (M. Hörnes, 1864) † (original description)
Unio vukotinovici M. Hörnes, 1864 † accepted as Potomida vukotinovici (M. Hörnes, 1864) † (original description)
Unio wetzleri (Dunker, 1848) † accepted as Pseudunio flabellatus (Goldfuss, 1837) † (basis of record)
Unio zelebori M. Hörnes, 1864 † accepted as Potomida zelebori (M. Hörnes, 1864) † (original description)
Venus dujardini M. Hörnes, 1859 † (original description)
Venus haidingeri M. Hörnes, 1861 † accepted as Dosina burdigalensis (Mayer, 1859) † (original description)
Venus islandicoides (Lamarck, 1818) † accepted as Cordiopsis islandicoides (Lamarck, 1818) † (basis of record)
Venus marginata M. Hörnes, 1852 † accepted as Timoclea marginata (M. Hörnes, 1852) † (additional source)

Austria for Arca hungarica M. Hörnes, 1864 † 
Austria for Cardium carnuntinum M. Hörnes, 1861 † 
Austria for Cardium conjungens M. Hörnes, 1861 † 
Austria for Congeria czjzeki M. Hörnes, 1867 † 
Austria for Corbula basteroti M. Hörnes, 1859 † 
Austria for Cytherea raulini M. Hörnes, 1861 † 
Austria for Gastrochaena intermedia M. Hörnes, 1859 † 
Austria for Lepton insignis M. Hörnes, 1864 † 
Austria for Pecten leythajanus M. Hörnes, 1867 † 
Austria for Pecten rollei Hörnes, 1867 † 
Austria for Pholadomya rectidorsata M. Hörnes, 1859 † 
Austria for Pleurodesma mayeri M. Hörnes, 1859 † 
Austria for Saxicava dubiosa M. Hörnes, 1859 † 
Austria for Tellina schoenni M. Hörnes, 1859 † 
Austria for Tellina strohmayeri M. Hörnes, 1859 † 
Austria for Unio atavus M. Hörnes, 1864 † 
Croatia for Unio oriovacensis M. Hörnes, 1864 † 
Croatia for Unio slavonicus M. Hörnes, 1864 † 
Croatia for Unio sturi M. Hörnes, 1864 † 
Croatia for Unio vukotinovici M. Hörnes, 1864 † 
Croatia for Unio zelebori M. Hörnes, 1864 † 
Czech Republic for Cardium conjungens M. Hörnes, 1861 † 
Czech Republic for Unio moravicus M. Hörnes, 1864 † 
Hungary for Cardium arpadense M. Hörnes, 1861 † 
Hungary for Cardium haueri M. Hörnes, 1861 † 
Hungary for Cardium hungaricum M. Hörnes, 1861 † 
Hungary for Cardium majeri M. Hörnes, 1861 † 
Hungary for Cardium petersi M. Hörnes, 1861 † 
Hungary for Cardium riegeli M. Hörnes, 1861 † 
Hungary for Cardium schmidti M. Hörnes, 1861 † 
Hungary for Congeria rhomboidea M. Hörnes, 1867 † 
Hungary for Pecten leythajanus M. Hörnes, 1867 † 
Moldova for Unio moldaviensis M. Hörnes, 1864 † 

 Nomenclature

 for Arca pisum M. Hörnes, 1864 †

Attributed to Partsch by Hörnes, but described by the latter. [details]

 Nomenclature

 for Cardium michelottianum M. Hörnes, 1861 †

Attributed to Mayer (who supplied specimens) by Hörnes, but described by the latter. [details]

 Nomenclature

 for Cardium moeschanum M. Hörnes, 1861 †

Attributed to Mayer (who provided a specimen) by Hörnes, but described by the latter. [details]

 Nomenclature

 for Cardium turonicum M. Hörnes, 1861 †

Attributed to Mayer by Hörnes, but described by the latter. [details]

 Nomenclature

 for Lithodomus avitensis M. Hörnes, 1867 †

Attributed to Mayer by Hörnes, but first described by the latter. [details]

 Nomenclature

 for Mactra turonica M. Hörnes, 1859 †

Attributed to Mayer (who provided specimens) by Hörnes, but described by the latter. [details]

 Nomenclature

 for Modiola brocchii M. Hörnes, 1867 †

Attributed to Mayer (who supplied a specimen) by Hörnes, but described by the latter. [details]

 Nomenclature

 for Ostrea hoernesi Reuss, 1870 †

The last part of the monograph, pp. 431-479, was finalized by Reuss after Hörnes' passing. [details]

 Nomenclature

 for Pecten leythajanus M. Hörnes, 1867 †

Attributed to Partsch by Hörnes, but described by the latter. [details]

 Nomenclature

 for Pectunculus obtusatus M. Hörnes, 1864 †

Attributed to Partsch by Hörnes, but described by the latter. [details]

 Nomenclature

 for Tapes basteroti M. Hörnes, 1859 †

Attributed to Mayer (who provided specimens) by Hörnes, but described by the latter. [details]

 Type locality

 for Cardium conjungens M. Hörnes, 1861 †

Hörnes listed numerous localities from the Vienna Basin in and around Vienna and Burgenland (Austria) as well as S ... [details]

 Type locality

 for Unio atavus M. Hörnes, 1864 †

Brunn, Moosbrunn, Matzleinsdorf, Austria [details]