ELACHISINIDAE Ponder, 1985

Coan, Eugene V., Pacaud, Jean-Michel & Kabat, Alan R., 2024, Gérard-Paul Deshayes (1796 - 1875) and his taxa, Geodiversitas 46 (16), pp. 553-930 : 623

Family ELACHISINIDAE Ponder, 1985

Lacunella – Deshayes, 1861-DescrCoqFoss: 383-384. — Type species (M): Lacunella depressa Deshayes, 1861 . Preoccupies Lacunella Dall, 1884 [ Littorinidae ]. Lacunaria Dall, 1885 , was a replacement name for Lacunella Dall, 1884 . However, it too proved to be a junior homonym, non Conrad, 1866 [ Naticidae ]. Haloconcha Dall, 1886 , was the final available replacement. In recent years, Haloconcha has been synonymized with Lacuna in the Littorinidae . — Current status: Lacunella Deshayes, 1861 , is a valid genus.

bulimoides , Lacuna – Deshayes, 1861-DescrCoqFoss: 377-378, 17, pl. 17, figs 19-21. — Type locality: Retheuil. — Type age: Eocene (Ypresian). — Type material: UCBL-EM 32453, syntype. Not to be confused with Lacuna bulimopsis [ Planaxidae ], which was mislabeled as L. bulimoides on one plate. — Current status: Lacunella bulimoides (Deshayes, 1861) ( Le Renard & Pacaud 1995: 102) .

depressa , Lacunella – Deshayes, 1861-DescrCoqFoss: 383-384, 18, pl. 18, figs 9-11. — Type locality: Parnes. — Type age: Eocene (Lutetian). — Type material: UCBL-EM 32458, syntype. — Current status: Lacunella depressa Deshayes, 1861 ( Le Renard & Pacaud 1995: 105; Pacaud 2008: 54).

marginata , Lacuna –Deshayes, 1861-DescrCoqFoss: 379, 17, pl. 17, figs 22-24. — Type localities: Hérouval, Chaumont-en-Vexin, Thiverval-Grignon, Fleury-la-Rivière & Chaussy. — Type age: Eocene (Lutetian). — Type material: UCBL-EM 32454 & 32455, syntypes from Thiverval-Grignon. — Type species (OD) of Cirsope Cossmann, 1888 . — Current status: Cirsope marginata (Deshayes, 1861) ( Le Renard & Pacaud 1995: 105; Pacaud 2008: 54).

minutissima , Lacuna –Deshayes, 1861-DescrCoqFoss: 376-377, 17, pl. 17, figs 1-3. — Type locality: Mouchy-le-Châtel. — Type age: Eocene (Lutetian). — Current status: Elachisina minutissima (Deshayes, 1861) ( Le Renard & Pacaud 1995: 105; Pacaud 2008: 54). nitens , Lacuna – Deshayes, 1861-DescrCoqFoss: 378, 18, pl. 18, figs 15-17. — Type locality: Thiverval-Grignon. — Type age: Eocene (Lutetian). — Current status: Lacunella depressa [Deshayes, 1861] nitens (Deshayes, 1861) ( Le Renard & Pacaud 1995: 101) . solidula , Lacuna – Deshayes, 1861-DescrCoqFoss: 380, 18, pl. 18, figs 21-23, non Lovén, 1846. — Type locality: Hérouval. — Type age: Eocene (Lutetian). Renamed Lacuna loveni Bayan, 1873a ( Bayan 1873a: 95). — Current status: Elachisina loveni (Bayan, 1873) ( Le Renard & Pacaud 1995: 102; Pacaud 2008: 54).

striatissima , Lacuna – Deshayes, 1861-DescrCoqFoss: 16, pl. 16, figs 29-31; 1865-DescrCoqFoss: 666 [pl. expl. should have said Lacuna labiata Sandberger, 1859 (pl. 12, fig. 8; 126-127, 1860), but noting this correction as “pl. 15” in error]. Deshayes thus came to regard his species to be a synonym of what is now Pseudocirsope labiata (Sandberger, 1859) . — Type localities: Jeurre, Etréchy, Morigny-Champigny, Franc & Hackenheim, Germany. — Type age: Oligocene (Rupelian). — Current status: synonym of what is now Pseudocirsope labiata (Sandberger, 1859)