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Pecten actinodes Sowerby 1846 from: Griffin, M..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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Species Pecten actinodes Sowerby 1846

Discussion / Comments:
Griffin & Nielsen (2008):
TYPE MATERIAL. Lectotype: NHM-L27960, a left valve, less complete than suggested by the figure (Sowerby 1846, pl. 3, fig. 33), with a fragment missing from the antero-ventral margin, with two small oysters attached to the disc on the postero-dorsal margin, and with the anterior margin of the anterior auricle sloping strongly forward and almost completely straight, from San José; paralectotype: NHM-L27983, a juvenile right valve from San José; paralecotype: NHM-L27982, a large (height 115 mm, width, 120 mm), complete and well preserved right valve, with the umbo and auricles a little hidden in the soft fawn-weathered sandstone, from San José. The identity of this specimen is doubtful but it certainly belongs in a different genus. REMARKS. Del Río (1992, text fig. 7) illustrated a cast of the left valve labeled NHM-L27960, which she referred to as the “holotype”. Apparently she was unaware of the existence of the other syntypes (see del Río 1992, p. 26). Sowerby’s original description does not clearly imply that there was more than one specimen. Therefore, this “designation by inference of holotype” is valid according to Article 74.6 of the ICZN (1999).
Synonym list:
Griffin & Nielsen (2008):
1846 Pecten actinodes Sowerby. - Sowerby : p.253 pl. 3; fig. 33
1921 Chlamys theresinae Roveretto. - Roveretto : p.27 fig. 27a
1992 Chlamys actinodes Sowerby. - del Rio : 27-30 pl.5, fig. 1-4; pl. 6, fig. 1-2; text-fig. 5-8
2000 "Chlamys" actinodes Sowerby. - del Rio : fig. 10.2
2002 Chlamys actinodes Sowerby. - Martinez & del Rio : fig. 13.1
2008 Zygochlamys actinodes Sowerby. - Griffin & Nielsen : pl. 1; fig. 1

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

Roveretto,G.. (1921):
Studi di geomorfolgia argentina V. La Penisola Valdez . Bollettino della Societa Geologica Italiana Vol. 40 p. 1-47

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.. (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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