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Species Arca bonplandiana d'Orbigny 1842


Discussion / Comments:
Griffin & Nielsen (2008):
TYPE MATERIAL. One syntype in the Typothèque of the Laboratoire de Paléontlogie, MNHN-A13944 (Santa Fé); four syntypes in the Typothèque of the Laboratoire de Géologie, MNHN-Gg2005/2 (Ensenada de Ros and mouth of the Río Negro). REMARKS. There is one syntype remaining in the collection of the MNHN, under number MNHN-A13944. This specimen is a very broken left valve, but might be identified with this widely ranging species. D’Orbigny (1842, p. 130) stated that it was an uncommon taxon, although this is not really the case, as it occurs frequently in many exposures in Entre Ríos and Northern Patagonia. In the Typothèque at the Laboratoire de Géologie in the MNHN, under number MNHN-Gg2005/2 there are four additional syntypes labeled “Arches” from “entre l’Ensenada de Ros et l’embouchure du Río Negro” [between Ensenada Ros and the mouth of the Río Negro]. These specimens are very different from the other syntype and from other material referable to this species that we have seen from Patagonia and Entre Ríos (see synonymy above). They are much larger and with a much thicker shell. D’Orbigny himself already noticed this and considered that most of his material comprised juveniles, as he had “fragments that were at least double in size”. It would probably be necessary to designate a lectotype for Anadara bonplandiana, but we refrain from doing so until further collection of material from Ensenada de Ros allows proper assessment of this taxon. The single syntype from Paraná left in the MNHN (Paléontologie) collection is very poorly preserved and a ruling from the ICZN is probably appropriate in order to set aside the available syntypes and select a neotype for this taxon. At present we can only say that the four syntypes numbered MNHN-Gg2005/2 are possibly a different species.
Synonym list:
Griffin & Nielsen (2008):
1842 Arca bonplandiana d'Orbigny. - d'Orbigny : p.130 pl. 14; fig. 15-18
non 1887 Arca lirata Philippi. - Philippi :
1893 Arca lirata Philippi. - Philippi : p.11 pl. 1; fig. 14
1936 Arca bonplandiana var. chubutensis Feruglio. - Feruglio : 135-136 pl. 2; fig. 11a-11b
1939 Arca bonplandiana d'Orbigny. - Wahnish : p.149 pl. 2; fig. 3a-3b
1987 Anadara (Rasia) lirata Philippi. - del Rio : 483-484 pl. 1; fig. 2
1987 Anadara (Rasia) n sp. bravardi . - del Rio : 484-485 pl. 1; fig. 3
1987 Anadara (Rasia) n sp. plana . - del Rio : p.485 pl. 1; fig. 4
1987 Scapharca (Potiarca) n sp. diamantensis . - del Rio : p.487 pl. 2; fig. 2
1987 Scapharca (Potiarca) frenguellii Jurado. - del Rio : p.488 pl. 2; fig. 3
1988 Anadara (Rasia) lirata Philippi. - del Rio : pl. 1; fig. 4
1988 Anadara (Rasia) bravardi . - del Rio : pl. 1; fig. 8
1991 Anadara (Rasia) lirata Philippi. - del Rio : 31-32 pl. 1; fig. 3; text-fig. 3-4, 7
1991 Anadara (Rasia) bravardi . - del Rio : 32-35 text fig. 3-7
1991 Anadara (Rasia) plana . - del Rio : 35-36 text fig. 3-4, 7-8
1991 Scapharca (Potiarca) bomplandeana d'Orbigny. - del Rio : 37-38 pl. 2; fig. 2; text fig. 10
1991 Scapharca (Potiarca) diamantensis . - del Rio : 38-40 text fig. 9-10
1991 Scapharca (Potiarca) frenguellii Jurado. - del Rio : p.40 pl. 1; fig. 5; text fig. 10
1992 Anadara (Rasia) lirata Philippi. - del Rio : 15-16 pl. 1; fig. 5-6
1992 Anadara (Rasia) bravardi . - del Rio : p.16 pl. 1; fig. 2-4
? 1998 Potiarca camaronesia Ihering. - del Rio & Camacho : 71-72 pl. 5; fig. 2-7
1998 Anadara (Rasia) lirata Philippi. - del Rio & Martinez Chiappara : 49-50 pl. 4, fig. 8-10; pl. 16, fig. 10; pl. 24; fig. 3
1998 Anadara (Rasia) bravardi . - del Rio & Martinez Chiappara : p.50 pl. 6, fig. 3-4; pl. 13, fig. 11; pl. 16, fig. 3-4; pl. 24; fig. 1-2
1998 Anadara (Rasia) plana . - del Rio & Martinez Chiappara : p.50 pl. 16; fig. 17
1998 Scapharca (Potiarca) bomplandeana d'Orbigny. - del Rio & Martinez Chiappara : 50-51 pl. 16, fig. 14-16; pl. 24; fig. 4
1998 Scapharca (Potiarca) diamantensis . - del Rio & Martinez Chiappara : p.51 pl. 16; fig. 7-9
1998 Scapharca (Potiarca) frenguellii Jurado. - del Rio & Martinez Chiappara : p.51 pl. 16; fig. 12-13
2000 Potiarca diamantensis del Rio. - del Rio : fig. 6
2000 Potiarca bomplandeana del Rio. - del Rio : fig. 7
2002 Scapharca bomplandeana d'Orbigny. - Martinez & del Rio : fig. 12.2
2008 Anadara bonplandiana d'Orbigny. - Griffin & Nielsen : pl. 2; fig. 10-11
References:

d'Orbigny,A. (1842):
Voyage dans l'Amerique méridionale.
In: Paléontologie Vol. 3(4) p. 187

Philippi,R.A.. (1887):
Die tertiären und quartären Versteinerungen Chiles.. p. 266

Philippi,R.A.. (1893):
Fósiles terciarios de la República Argentina . Anales del Museo Nacional de Chile p. 11

Feruglio,E.. (1936):
Nuevas especies de Moluscos supracretáceos y terciarios de la Patagonia. Nota preliminar . Boletín de Informaciones Petroleras Vol. 139 p. 121-136

Wahnish,E.. (1939):
Perforación Riachuelo Nº 5 Buenos Aires, perfil geológico y descripción de los fósiles . Revista del Centro de Estudiantes de Ciencias Naturales Vol. 2 p. 141-156

del Rio,C.J.. (1987):
Revisión dela Familia Arcidae (Mollusca: Bivalvia) en el Mioceno de la Provincia de Entre Ríos, República Argentina . Decimo Congresso Brasileiro de Paleontologia, Acais p. 479-493

del Rio,C.J.. (1988):
Bioestratigrafía y Cronoestratigrafía de la Formación Puerto Madryn (Mioceno medio) - Provincia del Chubut, Argentina . Anales de la Academia Nacional de Ciencias Exactas, Físicas y Naturales, Buenos Aires Vol. 40 p. 231-254

del Rio,C.J.. (1991):
Revisión sistemática de los bivalvos de la Formación Paraná (Mioceno medio) - Provincia de Entre Ríos - Argentina . Monografía de la Academia Nacional de Ciencias Exactas, Físicas y Naturales, Buenos Aires Vol. 7 p. 1-97

del Rio,C.J.. (1992):
Middle Miocene Bivalves of the Puerto Madryn Formation, Valdés Peninsule, Chubut Province, Argentina. Part I : Nuculidae - Pectinidae . Palaeontographica A Vol. 225 p. 1-58

del Rio,C.J.. and Camacho,H.H.. (1998):
Tertiary nuculoids and arcoids of eastern Patagonia (Argentina) . Palaeontographica A Vol. 250 p. 47-88

del Rio,C.J.. and Martinez Chiappara,S.A.. (1998):
Clase Bivalvia.
In: Moluscos marinos Miocenos de la Argentina y del Uruguay Vol. 15 Eds: del Rio, C.J.. p. 48-83

del Rio,C.J.. (2000):
Malacofauna de las Formaciones Paraná y Puerto Madryn (Mioceno marino, Argentina): su origen, composición y significado bioestratigráfico.
In: El Neógeno de Argentina, Serie Correlación Geológica Vol. 14 Eds: Aceñolaza, F.G..Herbst, R.. p. 77-101

Martinez,S.. and del Rio,C.G.. (2002):
Late Miocene molluscs from the southwestern Atlantic Ocean (Argentina and Uruguay): a palaeobiogeographic analysis. . Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 188 p. 167-187

Griffin,M.. and Nielsen,S.N.. (2008):
A revision of the type specimens of Tertiary molluscs from Chile and Argentina described by d’Orbigny (1842), Sowerby (1846), and Hupé (1854) . Journal of Systematic Palaeontology
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