Alvania cimex (Linnaeus, 1758)
Mediterranean
G_RISS_003 S. France 4-5mm – Corsica 4-5mm

Alvania cimicoides (Forbes, 1844)
Groenland to Norway, Azores to Mediterranean
Italy 3-3,5mm – S. Spain 3,4mm

Alvania lactea (Michaud, 1830)
Channel islands to Morocco, to Black Sea
G_RISS_009 Italy 4mm – NW. France 5mm

Alvania cancellata (da Costa, 1778)
British Isles to Mediterranean, Azores to W. Africa
G_RISS_001 Italy 3,5mm

Alvania hirta (Monterosato, 1884)
W. & C. Mediterranean
Italy 2,5mm

Alvania hispidula (Monterosato, 1884)
Mediterranean
Italy 3mm

Alvania geryonia (Chiereghini ms. in Nardo, 1847)
Azores to Mediterranean
Turkey 3,1mm

Alvania mamillata Risso, 1826
Mediterranean
Turkey 3mm

Alvania subcalathus (Dautzenberg & Fischer, 1906)
Selvagen to Canarias
Canarias 2mm

Alvania subsoluta (Aradas, 1847)
Norway to Canarias & W. Africa, Mediterranean
Alborán Sea 2,3mm

Alvania electa (Monterosato, 1874)
Canarias to central Mediterranean
Alborán 2mm

Alvania rudis (Philippi, 1844)
Western & central Mediterranean
Spain 2mm

Alvania punctura (Montagu, 1803)
Barents Sea to Canarias & W. Mediterranean
Italy 2,7mm

Alvania beanii (Hanley in Thorpe, 1844)
Norway to Canarias, Azores to Mediterranean
Spain 3,6mm

Alvania settepassii Amati & Nofroni, 1985
Central Mediterranean, Aegean
G_RISS_079 Italy 4mm

Alvania mediolittoralis Gofás, 1989
Azores, Madeira, to Canarias...
Canarias 2,5mm

Alvania lineata Risso, 1826
Mediterranean
Italy 4-4mm

Alvania discors (Allan, 1818)
Mediterranean
G_RISS_006 Italy 3-4mm

Alvania lanciae (Calcara, 1845)
Mediterranean
Turkey 2,9mm

Alvania testae (Aradas & Maggiore, 1844)
Norway to W. Africa, Mediterranean
Italy 1mm

Alvania zylensis Gofas & Waren, 1982
Western & central Mediterranean
S. Spain 2,2m

Alvania scabra (Philippi, 1844)
Mediterranean
S. Spain 2,3mm

Alvania pagodula (Bucquoy, Dautzenberg & Dollfuss, 1884)
W. Mediterranean
S. France 2,35mm

Alvania spinosa (Monterosato, 1890)
W. Mediterranean
S. Spain 2,8mm

Alvania elegantissima (Monterosato, 1875)
W. Mediterranean
Italy 1,3mm

Alvania subcrenulata (Bucquoy, Dautzenberg & Dolfuss, 1884)
Mediterranean
Malta 0,75mm

Alvania zetlandica (Montagu, 1815)
Iceland and Norway to Cabo Verde, to Mediterranean
Italy 3,5mm

Alvania carinata (da Costa, 1778)
British Isles to Mediterranean
S. Spain 3mm

Alvania weinkauffi weinkauffi (Weinkauff, 1868)
Algeria to S. Italy
Italy 2mm

Alvania weinkauffi jacobusi Oliveiro, Amati & Nofroni, 1986
Central Mediterranean
Italy 2,5mm

Alvania fischeri (Jeffreys, 1884)
Alboran to W. Mediterranean
Gibraltar Strait 2,1mm

Alvania subareolata (Monterosato, 1869)
W. & central Mediterranean
Italy 2mm

Alvania clathrella (Seguenza, 1903)
Eastern Sicily, Messina Strait
Messina Strait 2mm

Alvania campanii Tisselli & Giunchi, 2013
E. Aegean
NW. Turkey 2,4mm

Alvania dianiensis Oliverio, 1988
Archipelago Toscano, W. Italy
Isola del Giglio 2,2mm

Alvania parvula (Jeffreys, 1884)
Senegal to W. Mediterranean
S. Spain 3mm

Alvania colossophilus Oberling, 1970
Eastern Aegean, Crete
Dodecanese 4,4mm

Alvania oliverioi Buzzurro, 2003
Eastern Mediterranean
Cyprus 2,3mm

Alvania tenera (Philippi, 1844)
Canarias to Central Mediterranean
S. Spain 1,9mm

Alvania clarae Nofroni & Pizzini, 1991
Ionian Sea, Crete...
NW. Crete 1,75mm

Alvania angioyi van Aartsen, 1982
Azores to Canarias
Canarias 1,5mm

Alvania guancha Moolenbeek & Hoenselaar, 1989
Canarias
Canarias 2,4mm

Alvania multiquadrata van der Linden & Wagner, 1989
Madeira to Canarias
Canarias 1,8mm

Benthonella tenella (Jeffreys, 1869)
Iceland and Norway to E. USA, to Cabo Verde, Mediterranean
Sardinia 2mm

Botryphallus epidauricus (Brusina, 1866)
Cantabrian Sea, Madeira to Mediterranean
S. France 2,25mm

Botryphallus epidauricus (Brusina, 1866)
Cantabrian Sea, Madeira to Mediterranean
NE. Spain 2mm

Cingula trifasciata (J. Adams, 1800)
Norway & Azores to Mediterranean
Spain 3,5mm

Cingula trifasciata (J. Adams, 1800)
Norway & Azores to Mediterranean
NW. France 3-4mm

Crisilla chiarelli (Cecalupo & Quadri, 1995)
Eastern Mediterranean, Cyprus
Cyprus 1,5mm

Crisilla beniamina (Monterosato, 1884)
Mediterranean
Messina Strait 1-1,75mm

Crisilla semistriata (Montagu, 1808)
Norway to E. Mediterranean
Corsica 1,75mm

Crisilla gagliniae (Amati, 1985)
W. Mediterranean
S. France 2mm

Crisilla maculata (Monterosato, 1869)
Mediterranean
NE. Spain 1,5mm

Crisilla aartseni (Verduin, 1984)
Gibraltar Strait
S. Spain 1mm

Manzonia crassa (Kanmacher in J. Adams, 1798)
Norway to Mediterranean, to Black Sea
S. Spain 2,5-3mm

Obtusella intersecta (Wood, 1857)
Iceland & Norway to Azores, to eastern Mediterranean
NE. Spain 0,8mm

Obtusella intersecta (Wood, 1857)
Iceland & Norway to Azores, to eastern Mediterranean
NE. Italy 1mm

Obtusella macilenta (Monterosato, 1880)
W. Mediterranean, Adriatic
NE. Italy 1mm

Onoba semicostata (Montagu, 1803)
Norway to Mediterranean
Turkey 3mm

Peringiella elegans (Locard, 1892)
Mediterranean
NE. Spain 1,7-1,9mm

Plagyostila asturiana Fischer in Folin & Périer, 1872
N. Spain to Cabo Verde, W. Alborán
S. Spain 2,3-2,5mm

Pusillina radiata (Philippi, 1836)
British Isles to Mediterranean
Cyprus 4mm

Pusillina inconspicua (Alder, 1844)
Arctic to Azores, to Mediterranean
Spain 1,5mm

Pusillina lineolata (Michaud, 1830)
Mediterranean to Black Sea
NE. Spain 2mm

Pusillina munda (Monterosato, 1884)
Western Mediterranean
Canale di Sicilia 2mm

Pusillina philippi (Aradas & Maggiore, 1844)
Mediterranean
NE. Spain 1,8mm

Rissoa guerinii Récluz, 1843
British Isles to Canaries, to Mediterranean
Spain 5-6mm

Rissoa ventricosa Desmarest, 1814
W. Mediterranean
G_RISS_023 Italy 5-6mm

Rissoa decorata Philippi, 1846
Mediterranean
NW. Corsica 5,5mm

Rissoa splendida Eichwald, 1830
E. Mediterranean, Black Sea
Krasnodar 7mm

Rissoa similis Scacchi, 1836
Algarve to Mediterranean
Corsica 3-3,5mm

Rissoa violacea Desmarest, 1814
Arctic to Mediterranean
Turkey 5mm

Rissoa membranacea (J. Adams, 1797)
Norway to Mediterranean
Portugal 6-6,4mm

Rissoa lilacina Récluz, 1843
Arctic to Mediterranean
Spain 5mm

Rissoa monodonta Philippi, 1836
Mediterranean
G_RISS_055 Spain 5,5mm

Rissoa auriformis Pallary, 1904
Central Mediterranean
W. Crete 3,4mm

Rissoa parva (da Costa, 1778)
White Sea to W. morocco, to W. Mediterranean
NW. France 3mm

Rissoa lia (Monterosato, 1884)
Canaries to Mediterranean
S. Spain 4mm

Rissoa variabilis (von Mühlfeldt, 1824)
Mediterranean
Spain 9mm

Rissoa variabilis (von Mühlfeldt, 1824)
Mediterranean
Corsica 7mm

Rissoa paradoxa (Monterosato, 1884)
Southern Central Mediterranean
Tunisia 6,5mm

Rissoa aartseni Verduin, 1985
Tunisia
Tunisia 6,5mm

Rissoa angustior (Monterosato in Dautzenberg, 1917)
Mediterranean
G_RISS_049 Algeria 13mm

Rissoa auriscalpium (Linnaeus, 1758)
W. Mediterranean & Adriatic
Italy 7mm

Rissoa alleryi Nordsieck, 1972
South & central Mediterranean
G_RISS_060 Greece 5,5-6mm

Rissoa rodhensis (Verduin, 1985)
Eastern Mediterranean
Cyprus 5,5mm

Rissolina bertholleti (Issel, 1869)
Indian Ocean, Red Sea to E. Mediterranean
Israel 5,5mm

Setia fusca (Philippi, 1841)
Mediterranean to Canarias
Sicily 1mm

Setia bruggeni (Verduin, 1984)
Alboran Sea, W. Mediterranean
NE. Spain 0,8mm

Setia antipolitana (van der Linden & Wagner, 1987)
Western and central Mediterranean
Corsica 2,4mm

Setia ambigua (Brugnone, 1873)
Mediterranean
NW. Corsica 1,8mm

Setia slikorum (Verduin, 1984)
Galicia to W. Mediterranean
Immature – S. France 1,5mm

Zebina maxima Bozzetti, 2007
SW. Mascarenhas...
Comores 11,5mm