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Species Venus meridionalis Sowerby 1846


Discussion / Comments:
Griffin & Nielsen (2008):
TYPE MATERIAL. Lectotype (designated herein): NHM-L27980 (Santa Cruz); paralectotypes: NHM-L27973 (Santa Cruz), NHM-L27981 (Santa Cruz), NHM-L27999 (Navidad). The status of the specimen from Navidad is uncertain and it is probably not conspecific with the three syntypes from Santa Cruz. Del Río (1994) apparently assumed that the illustrated specimen was the “holotype”, not being aware that Sowerby’s figure is a composite. Her statement is not valid as a lectotype designation (ICZN 1999, Art. 74.5). However, in order to stabilize the nomenclature of this species, we follow common usage and designate specimen NHM-L27980 as lectotype. REMARKS. Sowerby (1846) also noted Navidad as locality, although remarking that the best specimens came from Santa Cruz. According to Philippi (1887), this species resembles more closely Venus discrepans Sowerby (living off the Chilean coast) than Venus exalbida Dillwyn, 1817 (=Samarangia =Retrotapes), to which it had been compared by d’Orbigny (1852). Del Río (1994, p. 120) showed that it belongs in Ameghinomya Ihering, 1907 [type species Venus volckmanni var. argentina Ihering, 1897].
Synonym list:
Griffin & Nielsen (2008):
1846 Venus meridionalis Sowerby. - Sowerby : p.250 pl. 2; fig. 13
1887 Venus meridionalis Sowerby. - Philippi : p.115 pl. 15; fig. 5
1902 Chione meridionalis Sowerby. - Ortmann : p.137 pl. 27; fig. 11a, b
1907 Chione meridionalis Sowerby. - Ihering : p.309 pl. 12; fig. 79
1974 Chione meridionalis Sowerby. - Frassinetti : p.48 fig. 8
1994 Ameghinomya meridionalis Sowerby. - del Rio : p.120 pl. 3; fig. 6-10
1999 Chione cf. meridionalis Sowerby. - Frassinetti & Covacevich : p.39 pl. 7; fig. 7-8
2008 Ameghinomya meridionalis Sowerby. - Griffin & Nielsen : pl. 8; fig. 4
References:

Sowerby,G.B.. (1846):
Descriptions of Tertiary fossil shells from South America..
In: Geological observations on South America. Eds: Darwin, C.. p. 249-264

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

Ortmann,A.E.. (1902):
Tertiary invertebrates: Reports of the Princeton Expedition to Patagonia, 1896–1899. Vol. 4(2) p. 45-332

Ihering,H.. (1907):
Les mollusques fossiles du Tertiaire et du Crétacé Supérieur de l’Argentine . Anales del Museo Nacional de Buenos Aires 3/7 p. 611

Frassinetti,D.. (1974):
El género Venus en la colección de fósiles Terciarios y Cuartarios de R.A. Philippi (1887) . Boletín del Museo Nacional de Historia Natural, Chile Vol. 33 p. 43-51

del Rio,C.J.. (1994):
Middle Miocene Bivalves of the Puerto Madryn Formation, Valdés Peninsule, Chubut Province, Argentina. Part II : Lucinidae - Pholadidae . Palaeontographica A Vol. 231 p. 93-132

Frassinetti,D.. and Covacevich,V.. (1999):
Invertebrados fosiles marinos de la Formacion Guadal (Oligoceno superior-Mioceneo inferior) en Pampa Castillo, region de Aisen, Chile Translated Title: Invertebrate marine fossils from the Guadal Formation (upper Oligocene-lower Miocene) at Pampa Castillo, Aisen region, Chile.. Vol. 51 p. 96

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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