ARCIDAE Lamarck, 1809

Coan, Eugene V., Pacaud, Jean-Michel & Kabat, Alan R., 2024, Gérard-Paul Deshayes (1796 - 1875) and his taxa, Geodiversitas 46 (16), pp. 553-930 : 702-705

Family ARCIDAE Lamarck, 1809

Anadara – Deshayes, 1830a-EncyMeth: 37, ex Adanson ms. Republication of an unavailable name (ICZN Code Art. 11.5.2). Eventually made available by J. E. Gray (1847).

Modioliformia – Deshayes, 1860-DescrCoqFoss: 866, 893. — Type species (SD Newell, 1960): Arca obliquaria Deshayes, 1829 . Now considered a synonym of Barbatia J. E. Gray, 1842 .

altera , Arca – Deshayes, 1858-DescrCoqFoss: 69, pl. 69, figs 14- 16. Error in this plate explanation for Arca disjuncta (see below).

amygdaloides , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 66, pl. 66, figs 9-11; 1860-DescrCoqFoss: 882-883. — Type localities: Auvers-sur-Oise, Valmondois & Le Fayel. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) amygdaloides (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 37; Le Renard & Pacaud 1995: 81).

aperta , Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca hians Reeve, 1844a (pl. 9, fig. 62), “ non Braun, 1842”. However, we cannot find any use of this species name prior to that of Reeve. — Type locality: None given. — Type age: Recent. The west African Mosambicarca hians ( Reeve, 1844) ( Huber 2010a: 141, 573). NHMUK 1969179, holotype of Arca hians Reeve, 1844 ( Stevenson 1972: 198). — Current status: Arca hians was treated as a nomen oblitum by Cosel & Gofas (2019: 140-141) and the species recognized as Anadara geissei (Dunker, 1891) . However, there are also other species names involved, as indicated by Huber (2010a: 573).

areolata, Arca – Deshayes, 1858-TraitElem: 349. Replacement name for Arca decussata “ Reeve, 1844 ”, non Nyst & Westendorp, 1839, but actually non Linnaeus, 1758. However, Reeve merely placed Byssoarca decussata G. B. Sowerby I, 1833 (p. 18), in Arca , and Deshayes’ replacement name was unnecessary and was never accepted. — Type localities: Anaa or Chain Island. — Type age: Recent. — Type material: NHMUK 1969232, 3 syntypes of Byssoarca decussata G. B. Sowerby I, 1833 ( Stevenson 1972: 197). — Current status: synonym of the Indo-Pacific Barbatia (Abarbatia) trapezina (Lamarck, 1819) ( Huber 2010a: 134) .

articulata , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 70, pl. 70, figs 7-9 [as figs 6-9 in text]; 1860-DescrCoqFoss: 882; 1865-DescrCoqFoss: 665 [error noted]. — Type localities: Chaumont-en-Vexin, Le Vivray & Hautteville-Bocage. — Type age: Eocene (Lutetian). — Current status: Barbatia (Barbatia) articulata (Deshayes, 1858) ( Le Renard & Pacaud 1995: 81; Pacaud 2008: 79).

asperula , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 66, pl. 66, figs 4-6; 1860-DescrCoqFoss: 883-884. — Type localities: Bouconvillers & Le Fayel. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) asperula (Deshayes, 1858) ( Le Renard & Pacaud 1995: 81) .

auversiensis , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 70, pl. 70, figs 10-11 [in text as figs 10-12]; 1860-DescrCoqFoss: 877-878; 1865-DescrCoqFoss: 665 [error noted]. — Type locality: Auvers-sur-Oise. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) auversiensis (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 38; Le Renard & Pacaud 1995: 81).

aviculina , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 66, pl. 66, figs 15-17; 1860-DescrCoqFoss: 887-888, non Schafhäutl, 1854. — Type localities: Caumont, Chéry-Chartreuve & Verneuil-l’Étang. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) montforti Le Renard, 1994 ( Le Renard 1994: 39), replacement name.

bernayi , Arca (Barbatia) –Deshayes, 1858-DescrCoqFoss: 65, pl. 65, figs 24-26; 1860-DescrCoqFoss: 885. — Type localities: Auvers-sur-Oise, Valmondois & Le Fayel. — Type age: Eocene (Bartoni- an). — Current status: Barbatia (Barbatia) bernayi (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 39; Le Renard & Pacaud 1995: 81).

bilobata, Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca divisa “d’Orbigny ”, actually (M’Coy, in Griffith, 1844: 74, pl. 11, fig. 30) [ Modiola ], non Hagenow, 1842. d’Orbigny (1850a: 134, no. 501) had moved M’Coy’s species to Arca . — Type locality: Ireland. — Type age: Carboniferous. — Current status: taxon inquirendum.

condita, Arca (Barbatia) –Deshayes, 1858-DescrCoqFoss: 66, pl. 66, figs 7-8, 69, as Arca “ geminata ”, pl. 69, figs 28-30; 1860-DescrCoqFoss: 878-879 [mentioning geminata ]; 1865-DescrCoqFoss: 666 [error noted]. — Type localities: Chaumont-en-Vexin, les Groux, Gomerfontaine, Montmirail, Parnes, Thiverval-Grignon, La Ferme de l’Orme, Damery, Fleury-la-Rivière, Chamery, Cumières, Hermonville, Boursault, Saint-Félix, Chambors, Auvers-sur-Oise, Bouconvillers, Caumont & La Ferté-sous-Jouarre. — Type age: Eocene (Lutetian-Bartonian). — Current status: synonym of Barbatia (Barbatia) appendiculata (J. Sowerby, 1820) ( Glibert & Van de Poel 1965a: 37) .

conradi , Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca lima ( Conrad, 1847: 295) [ Byssoarca ], non Reeve, 1844. — Type locality: – Vicksburg, Mississippi. — Type age: Eocene. — Current status: Dall (1898: 624-626) placed Conrad’s species in synonymy with Barbatia (Calloarca) cuculloides (Conrad, 1833) [ Arca ], which would make Deshayes’ replacement a synonym of that species and give it a distribution from the upper Eocene to the lower Oligocene.

contorta , Arca (Acar) – Deshayes, 1858-DescrCoqFoss: 65, pl. 65, figs 29-32; 1860-DescrCoqFoss: 873-874. — Type localities: Auvers-sur-Oise, Valmondois & Le Fayel. — Type age: Eocene (Bartonian). — Current status: synonym of Arca (Acar) lyelli Deshayes, 1829 ( Cossmann 1887: 127).

cordata , Arca – Deshayes, 1858-TraitElem: 349, not preoccupied by Arca cordata Benett, 1831 , a nomem nudum. Replacement name for Arca cardiiformis G. B. Sowerby I, 1833, non Basterot, 1825. — Type age: Recent – Current status: both A. cardiiformis G. B. Sowerby I, 1833 (p. 22), and A. cordata Deshayes, 1858 , are synonyms of the Panamic Anadara bifrons (P. P. Carpenter, 1857) [ Arca ] ( Coan & Valentich-Scott 2012: 172, pl. 54).

crenulata , Arca –Deshayes, 1858-TraitElem: 349. Replacement name for Arca clathrata Reeve, 1844a (pl 7, fig. 48), non Defrance, 1816, nec Lamarck, 1818. However, Nyst (1848: 18-19) had proposed an earlier replacement. — Current status: synonym of the Australian Anadara craticulata ( Nyst, 1848) [ Arca ] ( Huber 2010a: 139; 2015: chapter 5 on CD). — Type age: Recent.

cylindracea , Arca – Deshayes, 1829-DescrCoqFoss: 202, 17, pl. 34, figs 12-14; 1860-DescrCoqFoss: 887, as Arca (Barbatia) . — Type locality: Valmondois. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) cylindracea (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 39; Le Renard & Pacaud 1995: 81).

dichotoma, Arca – Deshayes, 1863: 22, pl. 3, figs 18-19. — Type locality: La Réunion. — Type age: Recent. — Type material: MNHN-IM-2000-3861, 2 syntypes. Synonym of Vitracar sulcata (Lamarck, 1819) [ Arca ] ( Oliver 1992: 34, as Barbatia ; Huber 2010a: 561; 2015: chapter 5 on CD).

disjuncta , Arca – Deshayes, 1858-DescrCoqFoss: 68, pl. 68, figs 30- 32; 69, as Arca “ altera ”, pl. 69, figs 14-16; 1860-DescrCoqFoss: 871-872; 1865-DescrCoqFoss: 666 [error in pl. expl. 69 noted]. — Type localities: Hérouval & Mercin-et-Vaux. — Type age: Eocene (Ypresian). — Type material: MNHN.F.J04155, syntype. — Current status: Arca (Arca) disjuncta Deshayes, 1858 ( Glibert & Van de Poel 1965a: 35; Le Renard & Pacaud 1995: 81).

distans , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 66, pl. 66, figs 18-23; 1860-DescrCoqFoss: 886-887;1865-DescrCoqFoss: 667 [on pl., figs 21-23 mislabeled as 24-26]. — Type localities: Auvers-sur-Oise, Valmondois, Le Fayel & La Ferté-sous-Jouarre. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) distans (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 40; Le Renard & Pacaud 1995: 81).

duchasteli , Arca – Deshayes, 1829-DescrCoqFoss: 217, 19, pl. 39, figs 1-3; 1860-DescrCoqFoss: 889, as Arca (Barbatia) . — Type locality: Thiverval-Grignon. — Type age: Eocene (Lutetian). — Current status: Barbatia (Barbatia) duchasteli (Deshayes, 1858) ( Le Renard & Pacaud 1995: 82; Pacaud 2008: 80).

edwardsi , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 66, pl. 66, figs 24-26; 1860-DescrCoqFoss: 884-885; 1865-DescrCoqFoss: 667 [on pl., figs 24-26 mislabeled as 21-23]. — Type localities: Auvers-sur-Oise, Valmondois, Vendrest & Le Fayel. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) barbatula [ Lamarck, 1805] edwardsi (Deshayes, 1858) ( Le Renard & Pacaud 1995: 82) .

effossa , Arca – Deshayes, 1858-DescrCoqFoss: 67, pl. 67, figs 29-32, as A. efossa ; 1860-DescrCoqFoss: 905. — Type locality: Mercin-et-Vaux. — Type age: Eocene (Ypresian). — Current status: Trigonodesma effossa (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 66; Le Renard & Pacaud 1995: 82).

errata, Arca –Deshayes, 1858-TraitElem: 350. Unnecessary replacement name for Arca sublata d’Orbigny, 1850b (d’Orbigny 1850b: 18, no. 292), itself a replacement for the Jurassic Arca lata Koch & Dunker, 1837 ( Koch & Dunker 1837: 49), non Gmelin, 1791, because Deshayes felt that d’Orbigny’s name was inappropriate (his footnote 1). — Current status: synonym of Arca sublata d’Orbigny, 1850 .

exornata , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 69, pl. 69, figs 1-3; 1860-DescrCoqFoss: 890-891. — Type localities: Laon, Cuise-la-Motte, Hérouval & Carla-Bayle (Ariège, France). — Type age: Eocene (Ypresian). — Type material: MNHN.F.J04144, syntype. — Current status: Barbatia (Rostarca) exornata (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 44-45; Le Renard & Pacaud 1995: 82).

fichteli , Arca –Deshayes, 1858-TraitElem: 350, 360. New species for Arca diluvii Lamarck, 1805 , of Hauer, 1847 ( Hauer 1847: 353). — Type locality: Coroi, Siebenbürgen, Romania. — Type age: Miocene (Burdigalian). — Current status: Anadara fichteli (Deshayes, 1858) ( Hörnes 1870: 329-330, pl. 43, figs 1-2, pl. 44, fig. 1; Glibert & Van de Poel 1965a: 54).

filigrana , Arca – Deshayes, 1829-DescrCoqFoss: 212, 17, pl. 33, figs 15-17; 1835-HistNatAnim2: 482; 1839-HistNatAnim3: 652; 1860-DescrCoqFoss: 875-876, as Arca (Barbatia) . — Type localities: Ferme de l’Orme & Chaumont-en-Vexin. — Type age: Eocene (Lutetian). — Current status: Barbatia (Cucullaearca) filigrana (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 46; Le Renard & Pacaud 1995: 81; Pacaud 2008: 80).

geminata , Arca ; see above under: condita, Arca (Barbatia) .

globulosa , Arca –Deshayes, 1829-DescrCoqFoss: 209-210, 17, pl. 33, figs 4-6; 1860-DescrCoqFoss: 893, as Arca (Anadara) . — Type locality: Cuise-la-Motte. — Type age: Eocene (Ypresian). — Current status: Scapularca globulosa (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 63; Le Renard & Pacaud 1995: 82; Pacaud 2008: 80). gracilis , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 69, pl. 69, figs 22-24; 1860-DescrCoqFoss: 888-889. — Type locality: Chéry-Chartreuve.— Type age:Eocene (Bartonian).— Current status: Barbatia (Barbatia) gracilis (Deshayes, 1858) ( Le Renard & Pacaud 1995: 82) .

granulosa , Arca –Deshayes, 1829-DescrCoqFoss: 208-209, 16, pl. 32, figs 17-18; 1860-DescrCoqFoss: 892, as Arca (Anadara) . — Type localities: Parnes, Châteaurouge & Ully-Saint-Georges. — Type age: Eocene (Lutetian). — Current status: Lunarca granulosa (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 59; Le Renard & Pacaud 1995: 82; Pacaud 2008: 80).

heberti , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 70, pl. 70, figs 4-6 [as figs 3-5 in text]; 1860-DescrCoqFoss: 884; 1865-DescrCoqFoss: 665 [error noted], “ non Cotteau, 1855”. — Type locality: Mercin-et-Vaux. — Type age: Eocene (Ypresian). — Type material: MNHN.F.J04173, holotype. Arca gervaisi Bayan, 1873a ( Bayan 1873a: 130), unnecessary replacement name. — Current status: Arca (Barbatia) heberti Deshayes, 1858 , is not a homonym of Arca hebertiana Cotteau, 1855 , now Barbatia (Barbatia) heberti (Deshayes, 1858) .

hyantula, Arca –Deshayes, 1829-DescrCoqFoss: 199-200, 17, pl. 34, figs 7-8. — Type localities: Valmondois, Acy-en-Multien. — Type age: Eocene (Bartonian); Touraine, Dax & Bordeaux. However, the Miocene material from the latter three localities is instead Arca biangulina d’Orbigny, 1852 (Deshayes, 1860-DescrCoqFoss: 868, “ La variété provenant des faluns de Touraine et de Dax que nous admettions dans notre hyantula, constitue une espèce distincte”). — Current status: synonym of Arca biangula Lamarck, 1805 (Deshayes 1860-DescrCoqFoss: 867).

inaspecta , Arca ; see below under: obliquaria , Arca .

insignis , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 65, pl. 65, figs 27-28; 1860-DescrCoqFoss: 876. — Type locality: Chaumont-en-Vexin. — Type age: Eocene (Lutetian). — Current status: synonym of Barbatia (Cucullaearca) sculptata (Deshayes, 1858) ( Le Renard & Pacaud 1995: 81; Pacaud 2008: 80).

interposita , Arca (Anadara) – Deshayes, 1858-DescrCoqFoss: 67, pl. 67, figs 11-13; 1860-DescrCoqFoss: 892-893. — Type locality: Hérouval. — Type age: Eocene (Ypresian). — Current status: Scapularca interposita (Deshayes, 1858) ( Le Renard & Pacaud 1995: 82; Pacaud 2008: 80).

intersecta , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 69, pl. 69, figs 25-27; 1860-DescrCoqFoss: 889-890. — Type locality: Aizy-Jouy. — Type age: Eocene (Ypresian). — Type material: MNHN.F.J04144, syntype. — Current status: Barbatia (Rostarca) intersecta (Deshayes, 1858) ( Le Renard & Pacaud 1995: 82) .

irregularis , Arca – Deshayes, 1829-DescrCoqFoss: 208, 16, pl. 32, figs 9-10; 1860-DescrCoqFoss: 880-881, as Arca (Barbatia) . — Type localities: Chaumont-en-Vexin & Valmondois. — Type age: Eocene (Lutetian-Bartonian). — Current status: Barbatia (Barbatia) irregularis (Deshayes, 1829) ( Le Renard & Pacaud 1995: 81; Pacaud 2008: 80).

lamellosa , Arca (Acar) – Deshayes, 1858-DescrCoqFoss: 69, pl. 69, figs 4-9; 1860-DescrCoqFoss: 872-873. — Type localities: Parnes, Chaumont-en-Vexin, Mouchy-le-Châtel, Chaussy, Le Fayel & Hautteville-Bocage. — Type age: Eocene (Lutetian-Bartonian). — Current status: Acar lamellosa (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 47; Le Renard & Pacaud 1995: 81; Pacaud 2008: 80; Leroy et al. 2014: 27, pl. 7, fig. 3a-b).

laudunensis , Arca –Deshayes, 1858-DescrCoqFoss: 69, pl. 69, figs 10- 13; 1860-DescrCoqFoss: 870-871. — Type locality: Laon. — Type age: Eocene (Ypresian). — Current status: Arca (Arca) laudunensis Deshayes, 1858 ( Le Renard & Pacaud 1995: 81).

lucida , Arca (Barbatia) –Deshayes, 1858-DescrCoqFoss: 67, pl. 67, figs 26-28; 1860-DescrCoqFoss: 891-892. — Type localities: Parnes & Fontenay-Saint-Père. — Type age: Eocene (Lutetian). — Current status: Barbatia (Rostarca) lucida (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 45; Le Renard & Pacaud 1995: 82; Pacaud 2008: 80).

lyelli , Arca – Deshayes, 1829-DescrCoqFoss: 200-201, 17, pl. 34, figs 9-11; 1860-DescrCoqFoss: 873, as Arca (Acar) . — Type locality: Valmondois. — Type age: Eocene (Bartonian). — Current status: Acar lyelli (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 48; Le Renard & Pacaud 1995: 81).

magellanoides , Arca – Deshayes, 1829-DescrCoqFoss: 213, 16, pl. 32, figs 7-8; 1860-DescrCoqFoss: 895-896. — Type locality: Valmondois. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) magellanoides (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 40; Le Renard & Pacaud 1995: 82).

marceauxiana , Arca – Deshayes, 1858-DescrCoqFoss: 67, pl. 67, figs 3-5;1860-DescrCoqFoss: 897-898. — Type localities: Hermonville, Boursault, Damery, Le Guépelle, Auvers-sur-Oise, Valmondois & Ludes. — Type age: Eocene (Lutetian-Bartonian-Priabonian). — Current status: Barbatia (Barbatia) marceauxiana (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 41; Le Renard & Pacaud 1995: 82; Pacaud 2008: 80).

minuata , Arca – Deshayes, 1858-DescrCoqFoss: 65, pl. 65, figs 20- 23; 1860-DescrCoqFoss: 869-870. — Type localities: Parnes, Thiverval-Grignon, Les Groux, Mouy, Coincourt, Hérouval, Chambors, Beaugrenier, Beauval & Auvers-sur-Oise. — Type age: Eocene (Lutetian-Bartonian). — Current status: Arca (Arca) minuata Deshayes, 1858 ( Le Renard & Pacaud 1995: 81; Pacaud 2008: 79).

minuta , Arca – Deshayes, 1833b: 231, “pl. 7, figs 4-6”, nomen nudum; 1835b: 110-111, pl. 24, figs 4-6, non O. F. Müller, 1776, nec J. Adams, 1797, nec Brocchi, 1814. — Type locality: Peloponnese Peninsula, Greece. — Type age: Recent. Subapennine Formation, Pliocene. Arca pumila Nyst, 1848 ( Nyst 1848: 58-59), replacement name for Arca minuta Deshayes, 1835 , as non (J. de C. Sowerby, 1824) [ Cucullaea ]. — Current status: taxon inquirendum.

modioliformis , Arca – Deshayes, 1829-DescrCoqFoss: 214-215, 16, pl. 32, figs 5-6; 1835-HistNatAnim2: 482; 1839-HistNatAnim3: 652; 1860-DescrCoqFoss: 896-897. — Type localities: Cuise-la-Motte & Maule. — Type age: Eocene (Ypresian-Lutetian); Valmondois (material from this locality is more likely to be Barbatia rigaultiana (Deshayes, 1858) from the Bartonian Eocene – Pacaud herein). — Type species (OD) of Obliquarca Sacco, 1898 , which is now regarded as a synonym of Barbatia J. E. Gray, 1842 . — Current status: Barbatia (Barbatia) modioliformis (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 41; Le Renard & Pacaud 1995: 82; Pacaud 2008: 80; Berezovsky 2015a: 1022-1024, pl. 11, figs 6-7; Nevesskaja et al. 2013: 201-203, fig. 69-2, with generic name misspelled as “ Obliguiarca ”).

mollis, Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca minuta Reeve, 1844a (pl. 17, fig. 112), non Deshayes, 1835. However, both of the latter are non Arca minuta O. F. Müller, 1776 , non J. Adams, 1797, nec Arca minuta Brocchi, 1814 . The first replacement name for Reeve’s species was Arca minima Nyst, 1848 ( Nyst 1848: 44); however, it is a junior homonym of Arca minima Turton, 1819 . — Type locality: Philippine Islands. — Type age: Recent. — Current status: Reeve’s species remains a taxon inquirendum and if recognized would require another replacement name.

morieri , Arca (Barbatia) –Deshayes, 1858-DescrCoqFoss: 65, pl. 65, figs 18-19; 1860-DescrCoqFoss: 874-875 [said to be named for a Mr. “Morière”]; 1865-DescrCoqFoss: 665, 666 [name should have been Arca morlieri , but this change would not be permitted – ICZN Code Art. 32.5]. — Type localities: Pierrefonds, Cuise-la-Motte & Hérouval. — Type age: Eocene (Ypresian). — Current status: Barbatia (Cucullaearca) morieri (Deshayes, 1858) ( Le Renard & Pacaud 1995: 81; Pacaud & Le Renard 1995: 187, as “ morlieri ”).

nystii , Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca pusilla Nyst, 1845a ( Nyst 1845a: 261-262), non (G. B. Sowerby I, 1833) [ Byssoarca ] when Deshayes placed them both in Arca . In fact, Nyst had described his taxon somewhat earlier (1835: 14, pl. 3, fig. 55), as Arca (Cucullaea) pusilla . — Type locality: Anvers [Antwerp], Belgium. — Type age: – Miocene. — Current status: Deshayes replacement is a synonym of Nyst’s species.

obliquaria , Arca – Deshayes, 1829-DescrCoqFoss: 215-216, 17, pl. 34, figs 18-19; 1860-DescrCoqFoss: 893-894, 67, as Arca inaspecta , pl. 67, figs 8-10, 10 bis. — Type localities: Cuise-la-Motte & Ferme de l’Orme. — Type age: Eocene (Ypresian-Lutetian). He considered naming an additional species based on some figured specimens but changed his mind. — Current status: Barbatia (Barbatia) obliquaria (Deshayes, 1829) ( Le Renard & Pacaud 1995: 82; Pacaud 2008: 80; Hickman 2021: 16, fig. 5A-H).

ornata , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 70, pl. 70, figs 18-20; 1860-DescrCoqFoss: 886. — Type locality: Chaussy. — Type age: Eocene (Lutetian). — Current status: Barbatia (Barbatia) ornata (Deshayes, 1858) ( Le Renard & Pacaud 1995: 81; Pacaud 2008: 80).

planicosta , Arca – Deshayes, 1829-DescrCoqFoss: 204-205, 16, pl. 32, figs 1-2; 1835-HistNatAnim2: 480; 1839-HistNatAnim3: 631; 1860-DescrCoqFoss: 878, as Arca (Barbatia) . — Type localities: Mouchy-le-Châtel, Parnes, Senlis & Valmondois. — Type age: Eocene (Lutetian-Bartonian). Barbatia (Barbatia) appendiculata [J. Sowerby, 1821] planicosta (Deshayes, 1829) ( Le Renard & Pacaud 1995: 81) . — Current status: Barbatia (Barbatia) planicosta (Deshayes, 1829) ( Pacaud 2008: 80) .

portlocki, Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca transversa Portlock, 1843 ( Portlock 1843: 428, pl. 34, fig. 4), non Say, 1822. However, Arca transversalis Nyst, 1848 ( Nyst 1848: 74), was an earlier replacement name. — Type locality: Tyrone, Northern Ireland. — Type age: Silurian.

pretiosa , Arca – Deshayes, 1858-DescrCoqFoss: 70, pl. 70, figs 16- 17; 1860-DescrCoqFoss: 901. — Type localities: Etréchy, Alzey, Mayence & Kassel. — Type age: Oligocene (Rupelian). Striarca (Galactella) pretiosa (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 62) . — Current status: Striarca pretiosa (Deshayes, 1858) (R. Janssen 1979: 29; Lozouet & Maestrati 2012a: 246, 248, fig. 156: 11-14; Berezovsky 2015a: 1045-1046, pl. 16, fig. 7).

profunda , Arca – Deshayes, 1829-DescrCoqFoss: 207-208, 16, pl. 32, figs 3-4; 1860-DescrCoqFoss: 880-881, as synonym of Arca irregularis Deshayes, 1829 . — Type locality: Chaumont-en-Vexin. — Type age: Eocene (Lutetian). — Current status: synonym of Arca irregularis Deshayes, 1829 .

punctifera , Arca – Deshayes, 1829-DescrCoqFoss: 202-203, 16, pl. 32, figs 13-14; 1860-DescrCoqFoss: 890. — Type locality: Mouchy-le-Châtel. — Type age: Eocene (Lutetian). — Current status: Barbatia (Rostarca) punctifera (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 45; Le Renard & Pacaud 1995: 82; Pacaud 2008: 80).

radians , Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca radiata Reeve, 1844a (pl. 6, fig. 40), non J. de C. Sowerby, 1840, nec Schroeter, 1802, nec G. Fischer, 1807, nec Münster, in Goldfuss, 1837. — Type locality: Japan. — Type age: Recent. However, an earlier replacement name was Arca tricenicosta Nyst, 1848 ( Nyst 1848: 74).– Current status: the Japanese Anadara tricenicosta ( Nyst, 1848) ( Huber 2010a: 140) .

revelata , Arca – Deshayes , 1863: 23, pl. 3, figs 20-21. — Type locality: La Réunion. — Type age: Recent. — Type material: MNHN-IM-2000-3922, syntype ; MNHN-IM-2000-3954, syntype. — Current status: Barbatia (Barbatirus) revelata (Deshayes, 1863) ( Huber 2010a: 134, 564).

rigaultiana , Arca – Deshayes, 1858-DescrCoqFoss: 67, pl. 67, figs 6-7; 1860-DescrCoqFoss: 896. — Type localities: Caumont, Le Guépelle, La Ferté-sous-Jouarre, Le Fayel & Auvers-sur-Oise. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) rigaultiana (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 42; Le Renard & Pacaud 1995: 82).

rudis , Arca – Deshayes, 1829-DescrCoqFoss: 210-211, 17, pl. 33, figs 7-8, non Arca rudis (J. de C. Sowerby, 1824) [ Cucullaea ]; 1835-HistNatAnim2: 481-482;1839-HistNatAnim3: 652;1860-DescrCoqFoss: 874, as Arca (Barbatia) . — Type localities: Valognes & Valmondois. — Type age: Eocene (Lutetian-Bartonian) &Touraine, Angers; Miocene (Tortonian). Material from the latter locality is more likely Barbatia (Cucullaearca) bohemica Reuss, 1860 ) (Pacaud herein). Arca scabrosa Nyst, 1848 ( Nyst 1848: 64-65), replacement name. Arca subrudis d’Orbigny, 1850b (d’Orbigny 1850b: 424, no. 1630), unnecessary additional replacement name. — Current status: Barbatia (Cucullaearca) scabrosa ( Nyst, 1848) ( Le Renard & Pacaud 1995: 81) .

sabuletorum , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 70, pl. 70, figs 1-3 [fig. 3 not mentioned in text]; 1860-DescrCoqFoss: 877; 1865-DescrCoqFoss: 665 [error noted]. — Type localities: Auvers-sur-Oise & Mary-sur-Marne. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) sabuletorum (Deshayes, 1858) ( Le Renard & Pacaud 1995: 81) .

sandbergeri , Arca – Deshayes, 1858-DescrCoqFoss: 68, pl. 68, figs 1-3; 1860-DescrCoqFoss: 868-869. — Type localities: Romainville, Château-Landon, Mayence, Kassel & Magdeburg. — Type age: Oligocene (Rupelian). — Type material: MNHN.F.J04138, syntype. — Current status: Arca (Arca) sandbergeri Deshayes, 1858 ( Glibert & Van de Poel 1965a: 36; R. Janssen 1979: 23; Lozouet & Maestrati 2012a: 446-447, fig. 156: 7-10; Berezovski 2015a: 999- 1003, pl. 2, figs 1-4, pl. 3, figs 1-4, pl. 4, figs 1, 6).

sculptata , Arca – Deshayes, 1829-DescrCoqFoss: 211, 17, pl. 33, figs 12-14; 1860-DescrCoqFoss: 876, as Arca (Barbatia) . — Type locality: Chaumont-en-Vexin. — Type age: Eocene (Lutetian). Barbatia (Barbatia) sculptata (Deshayes, 1829) ( Glibert & Van de Poel 1965a: 42) . — Current status: Barbatia (Cucullaearca) sculptata (Deshayes, 1829) ( Le Renard & Pacaud 1995: 81; Pacaud 2008: 80).

semidentata, Arca –Deshayes, 1839-TraitElem: 23, pl. 36, figs 8-9. — Type locality: none given. — Type age: Recent. — Current status: synonym of the western Atlantic Lunarca ovalis (Bruguière, 1789) [ Arca ] ( Mikkelsen & Bieler 2007: 52-53; Huber 2010a: 42; 2015: chapter 5 on CD).

setosa, Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca obliqua Reeve, 1844a (pl. 6, fig. 41), non Portlock, 1843, nec Philippi, 1844. However, an earlier replacement was Arca setigericosta Nyst, 1848 ( Nyst 1848: 68). — Type locality: west coast of Africa. — Type age: Recent. — Current status: the Asian Anadara setigericosta ( Nyst, 1848) ( Huber 2010a: 136) .

sicula , Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca obliqua R. A. Philippi, 1844b ( Philippi 1844b: 43-44, 299, pl. 15, fig. 2, 2c), non Portlock, 1843. However, an earlier replacement was Arca philippiana Nyst, 1848 ( Nyst 1848: 54) ( Coan & Kabat 2017: 54, who discussed related nomenclatural complexities). — Type locality: Lamati, Calabria, Italy. — Type age: Recent. — Current status: the eastern Atlantic Bathyarca philippiana ( Nyst, 1848) ( Huber 2010a: 142) .

smithi, Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca subrostrata “Smith”, actually G. B. Sowerby I, in J. Smith, 1847 ( Smith 1847: 418, pl. 15, figs 8-9), non Anton, 1838, nec Conrad, 1841. — Type locality: near Lisbon, Portugal. — Type age: early Miocene. — Current status: taxon inquirendum.

spathulata , Arca – Deshayes, 1858-DescrCoqFoss: 70, pl. 70, as A. spatulata , figs 12-15 [in text as figs 13-15]; 1860-DescrCoqFoss: 895; 1865-DescrCoqFoss: 665 [error in spelling on plate explanation noted]. — Type localities: Auvers-sur-Oise, Jaignes & Le Fayel. — Type age: Eocene (Bartonian). The correction in spelling would be allowed because it is evident that it was a typographical error (ICZN Code Art. 32.5.1). — Current status: Barbatia (Barbatia) spathulata (Deshayes, 1858) ( Glibert & Van de Poel 1965a: 42; Le Renard & Pacaud 1995: 82; Tréguier & Pacaud 2018: 211).

sphaeroidalis, Arca – Deshayes, 1858-TraitElem: 350. Replacement name for Arca globosa Reeve, 1844a (pl. 8, fig. 52), non Dubois de Montpéreux, 1837, but the latter was a nomen nudum, so Deshayes name was an unnecessary replacement. — Type locality: Catbalonga, Samar, Philippine Islands. — Type age: Recent. — Current status: the Indo-Pacific Anadara globosa ( Reeve, 1844) ( Huber 2010a: 137, 569).

textiliosa , Arca (Barbatia) – Deshayes, 1858-DescrCoqFoss: 66, pl. 66, figs 12-14 [text in captions 12 & 13 reversed]; 1860-DescrCoqFoss: 881; 1865-DescrCoqFoss: 666 [error noted]. — Type localities: Auvers-sur-Oise & Caumont. — Type age: Eocene (Bartonian). — Current status: Barbatia (Barbatia) textiliosa (Deshayes, 1858) ( Le Renard & Pacaud 1995: 81) .

trapezia , Arca –Deshayes, 1839d: 358;1840: 2, pl. 21. — Type locality: “San Blas, Mexico ” [actually Australia]. — Type age: Recent. — Type material: MNHN unnumbered, 2 probable syntypes. — Current status:the Australian-New Zealand Anadara trapezia (Deshayes, 1839) ( Powell 1979: 363-364, pl. 71, fig. 5; Beu 2004: 134-139, fig. 6; Huber 2010a: 137; Poppe 2010: 476, pl. 929, figs 1-3).

trigona , Arca –Deshayes, 1858-TraitElem: 350, non J. E. Gray, 1825. Replacement name for Arca obliquata Zieten,1833 (Zieten 1833:93–94, pl. 70, fig. 2a-b), non “Gray”, actually non W. Wood, 1828. — Type locality: Nattheim, near Heidenheim, Germany. — Type age: Jurassic (Kimmeridgian). Unfortunately, Deshayes created another junior homonym and therefore synonym. A still later Arca obliquata Locard, 1899 , is a synonym of Bathyarca philippiana ( Nyst, 1848) [ Arca ]. — Current status: Zieten’s species remains a taxon inquirendum.

turgidula , Arca – Deshayes, 1844d: 2, pl. 84. — Type locality: none given. — Type age: Recent. Barbatia (Ustularca) ? – Current status: taxon inquirendum (Huberg 2015: chapter 5 on CD).

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scapulina, Scapularca – Listed by Pacaud (2008: 80) as “Deshayes, 1805”, an error for Lamarck, 1805.

striatularis , Arca –Deshayes, 1858-DescrCoqFoss: 67, pl. 67, figs 1-2; 1860-DescrCoqFoss: 894-895. Made available byMelleville (1843: 84 [37-38, 82], pl. 2, figs 12-14). Ciry Salsogne. — Type age: Eocene (Ypresian). Glibert & Van de Poel (1965a: 42) had as “Deshayes” .